Leser Compact Performance 6f576x
This document was ed by and they confirmed that they have the permission to share it. If you are author or own the copyright of this book, please report to us by using this report form. Report r6l17
Overview 4q3b3c
& View Leser Compact Performance as PDF for free.
More details 26j3b
- Words: 15,583
- Pages: 64
Compact performance Threaded Safety Relief Valves Series 437 Type 437 · 438 · 439 Series 459 Type 459 · 462
CATALOG The Safety Valve
Series 459 Packed lever H4
Series 459 Balanced bellows design
Frontview 462 H4 GG 4c
Frontview 462 H2 GG SB 4c
Series 459 Cap H2
Series 459 Flanged version
Frontview 462 H2 GG 4c
Series 459 Plain lever H3 Frontview 462 H3 GG 4c
Threaded Safety Relief Valves Spring Loaded Contents
Contents
General Applications
5
Features and Benefits
5
Codes and Standards
5
Overview
6
Series 459
33
Materials
10
Materials
34
How to Order • Numbering System • Article Numbers • Available Connections
12 14 15
How to Order • Numbering System • Article Numbers • Available Connections
40 42 43
Dimensions and Weights
16
Dimensions and Weights
44
Pressure Temperature Ratings
18
Pressure Temperature Ratings
46
Accessories and Options • Caps and Levers • Metal Seat • Soft Seal • Heating Jacket
20 21 22 24
Spare Parts
25
Approvals Series 437
27
Accessories and Options • Caps and Levers • Balanced Bellows • Metal Seat • Soft Seal • Heating Jacket • Lift Indicator
48 50 51 52 54 55
Capacities Type 437
28
Spare Parts
56
Capacities Type 438 / 439
30
Approvals Series 459
58
Specification Sheet
32
Capacities Series 459
59
Specification Sheet
62
Series 437
9
Series 437 Cap H2
Series 437 Packed lifting device H4 LWN 471.01
Series 437 Flanged version
3
Threaded Safety Relief Valves Spring Loaded General
LESER´ s compact performance valves are spring loaded
LESER´ s compact performance valves are designed and
safety relief valves of specially com-
manufactured to highest standards and
pact design, developed in close coop-
compliant with and approved accord-
eration with plant engineers and ser-
ing to ASME (Sec. VIII, Div. 1), the
vice specialists to protect special
Canadian CRN, the European PED
processes and installations against
standard (CE), the German AD 2000-
overpressure.
Merkblatt A2 and those of many other
Extensive testing at the LESER ASME-
countries, covering requirements from
certified test lab together with up to
end-s, OEM´ s and engineering
date manufacturing processes ensure
companies worldwide.
the reliability of these state of the art products.
Type 437 / 438 / 439
Type 459 / 462
4
LWN 471.02
Threaded Safety Relief Valves Spring Loaded Applications · Features and Benefits · Codes and Standards
Applications
Features and Benefits
Codes and Standards
LESER´ s compact performance valves represent the ultimate solution for critical applications such as
LESER´ s compact performance valves cover a large variety of types, materials and options to fit any application: Scope of Design ● Four valve sizes from 1/2” through 11/2” ● Four orifice sizes from 0.3*D through F ● Threaded or flanged connections ANSI or DIN, Inlet rating: class 150# to 2500# ● Standard metal sealing: Type 437 and Type 459 or ● Soft seal: Type 438, 439 and 462 ● Optional stainless steel bellows for back pressure compensation ● Packed or plain lifting lever or gastight cap ● Heating jacket available for high viscosity fluids
LESER´ s compact performance valves comply with the following codes and standards:
● ● ● ● ● ● ●
Air/gas compressors and pumps Technical gases and CO2 plants Chemical equipment and piping Pressure vessels and piping systems containing gas, air, liquid or steam LPG/LNG terminals, carriers etc. Cryogenic systems and oxygen application Thermal relief
●
● ● ● ● ● ●
●
ASME Section VIII – National Board certified capacities (single trim for steam, gas and liquid service): UVstamp ASME Section II - materials ASME B 16.34 and ASME B16.5 API 527, NACE MR 0175 CRN EN ISO 4126-1 PED 97 / 23 / EC (CE-marking), VdTUEV-SV 100, AD 2000-Merkblatt A2 Others
Compact design and High Performance ● Single trim for steam, gas and liquid for less spare parts and easier maintenance ● Broad set pressure range up to 11600 psig ● Self-draining body design, avoids residues and reduces corrosion ● One-piece spindle reduces friction ● Unobstructed seat bore for maximum capacity compared to nominal size ● Heavy duty design Type 459M ● Various materials: chrome steel, stainless steel, Monel®‚ or Hastelloy® ● All parts machined from bar stock for complete valves from special materials within short time ● Variety of capacities and versions, multiple choice of connections to fit any application Ease of plant design, installation, operation and maintenance ● Replaceable nozzle and disc ● Hardened or optional stellited metal sealing for longer product life ● Soft seat for superior tightness ● Ringless design, no adjustments
LWN 471.03
5
Threaded Safety Relief Valves Spring Loaded General · Overview
Overview
Series 437 ● ● ●
Series 459
Type 437: Metal to metal seat Type 438: Soft seal, o-ring Type 439: Soft seal, vulcanized
Common Features ● Very compact design ● Medium capacity ● Two standard body materials: chrome steel, stainless steel ● All parts machined from bar stock – various material options available ● Various connections
● ●
Type 459: Metal to metal seat Type 462: Soft seal, o-ring
Common Features ● Compact design ● High capacity compared to nominal sizes: for most common valve size 3/4” x 1” up to 1.5 D-orifice capacity * ● Four different orifice sizes available ● Wide range of set pressures ● Optional balanced bellows ● Three body materials: cast iron, carbon steel, stainless steel ● Various connections
The diagram gives a quick overview about the main features of LESER’s compact performance valves: capacity and tightness.
Tightness
Series 437
Series 459
Type 439 Vulcanized soft seal Type 438 O-ring disc Type 437 Sealing plate
Type 462 O-ring disc Type 459 Sealing plate
Type 437 Metal to metal
Type 459 Metal to metal
Capacity / Orifice
Selection of Threaded Safety Relief Valves Criteria
Series Type
Set Pressure
> 2700psig > 6000psig
High Flow Capacity is required
≥ D Orifice ≥ F Orifice
Thermal Expansion application Soft Seats Metal Seats Temperature > 536 °F Temperature < -50 °F Variable Back Pressure occurs Threaded Connections are required Flanged Connections are required Note: 6
1
437 437 – – – – ✓ –1 ✓ – ✓ – ✓ ✓
Flanged SRV
459
438 – – – – ✓ ✓
439 – – – – ✓ ✓
– – – – ✓ ✓
– – – – ✓ ✓
459 ✓ ✓ ✓
462 ✓
e.g. 526 ✓
– ✓
– – –1 ✓ ✓ ✓ ✓ ✓ ✓
– – ✓
– ✓ ✓
– – – ✓ ✓ ✓
– ✓ ✓ ✓ ✓ ✓ – ✓
Disc with sealing plate (e.g. PTFE) is available. LWN 471.04
Threaded Safety Relief Valves Spring Loaded General · Overview
Metal to metal seat
Type 437 and 459 provide for the protection of installations where the metal to metal seat with its wide temperature range and good chemical resistance is suitable.
Set Pressure [psig]
Type 437 and 459 can be equipped with an optional sealing plate disc for low temperature soft seat applications. 459 0.044 inch2 459 0.099 inch2
437 Long Version 0.122 inch2 437 Standard Version 0.122 inch2
459 0.206 inch2 459 0.373 inch2
Capacity / Orifice
Metal to metal seat
Type 437 Capacity Set pressure Sealing Design
LWN 471.05
Orifice 0.5*D up to 2610 psig metal to metal very compact
Type 459 Capacity Set pressure Sealing Design
Orifice 0.3*D through F up to 11600 psig metal to metal compact, optional bellows, heavy duty design 459M
Schnitt 459 H2 male 4c
7
Threaded Safety Relief Valves Spring Loaded General · Overview
Soft seal
Type 438, 439 and 462 provide for the protection of installations where a soft seat for superior tightness is required like for hard to hold gases.
Set Pressure [psig]
Type 439 allows maintained tightness close to the set pressure especially at lower set pressures due to the advanced design of the vulcanized soft seat.
462 0.099 inch2
438 Long Version 0.122 inch2 438 Standard Version 0.122 inch2
462 0.206 inch2 462 0.373 inch2
439 0.122 inch2
Capacity/ Orifice
Soft seal
Type 438 Capacity Set pressure Sealing Design
8
Orifice 0.5*D up to 2610 psig soft seal, O-ring very compact
Type 439 Capacity Set pressure Sealing Design
Orifice 0.5*D up to 232 psig vulcanized soft seal very compact
Type 462 Capacity
Schnitt 439 H2 3 4x1 male 4c
Set pressure Sealing Design
Orifice 0.75*D through F up to 5075 psig soft seal, O-ring compact, optional bellows
Schnitt 462 H2 male 4c
LWN 471.06
Threaded Safety Relief Valves Spring Loaded Series 437
Series 437
Type 437 / 438 / 439
Type 437 / 438 / 439 Flanged Version LWN 471.07
9
Series 437
Threaded Safety Relief Valves Spring Loaded Materials Type 437
Materials Type 437 Item
Part Name
40
Type 4373 Chrome Steel
Type 4374 Stainless Steel SA 479 316L SA 479 316L
1 2
Inlet body Outlet body
SA 479 316L SA 479 430
7
Disc
12 16 / 17
Spindle Spring plate
Hardened stainless steel AISI 420 AISI 430F
18 19 40 54 57
Adjusting screw with bushing Lock nut Cap H2 Spring Pin
AISI 430F PTFE Steel Steel Stainless steel Stainless steel
316L PTFE 316L 316L Stainless steel Stainless steel
61
Ball
Hardened stainless steel
316
18 19 16 12
316L
54
316L 316L
2 17 57 61 7 1
Flanged Version 1 2 2.1 2.2 48
Inlet body Outlet body Outlet adaptor Outlet flange Inlet flange
SA 479 316L SA 479 430 316L 316L 316L
SA 479 316L SA 479 316L 316L 316L 316L
Type 437
40 18 19 16 2.2
2.1
12 54 2 17 57 61 7 1 48
Type 437 Flanged version 10
LWN 471.08
Threaded Safety Relief Valves Spring Loaded Materials Type 438 · Type 439
Materials Type 438 · Type 439
40
Item
Part Name
Type 4383 Type 4393 Chrome Steel
Type 4384 Type 4394 Stainless Steel
1 2
Inlet body Outlet body
SA 479 316L SA 479 430
SA 479 316L SA 479 316L
19
7
Disc with soft seal 1 Spindle Spring plate
316L
316L
16
AISI 420 AISI 430F
316L 316L
12
18
Adjusting screw with bushing
AISI 430F PTFE
316L PTFE
54
19 40 54 57
Lock nut Cap H2 Spring Pin
Steel Steel Stainless steel Stainless steel
316L 316L Stainless steel Stainless steel
61
Ball
Hardened stainless steel
316
12 16 / 172
18
2
7
1
Flanged Version 1 2 2.1 2.2 48 Notes:
Inlet body Outlet body Outlet adaptor Outlet flange Inlet flange CR NBR EPDM FPM FFKM
1
2
– – – – – –
SA 479 316L SA 479 430 316L 316L 316L
SA 479 316L SA 479 316L 316L 316L 316L
Type 438 O-ring seal
Neoprene Nitrile Ethylene / Propylene Fluorocarbon Kalrez® (Type 438) ISOLAST® (Type 439)
Schnitt 438 H2 3 4x1 male 4c
40
18
Item 17 only Type 439
16 2.2
2.1 12
54
2 2
17 7
57 1
61 48
7
1
Type 439 Vulcanized soft seal
Type 438 Flanged version
LWN 471.09
11 Schnitt 438 H2 Flansch
Series 437
Threaded Safety Relief Valves Spring Loaded How to Order – Numbering System
How to Order Numbering System
1
Article Number 1
2
3
Set Pressure
Please state unit (in gauge)!
4
Please do not exceed pressure range mentioned in the spring charts.
437 4 . 314 2 1
2
3
Connections
Please refer to table “Available Connections” on page 15. Please state one option code for each, inlet and outlet.
Type 437 / 438 / 439 Type
Types of sealing 437 Metal seat Metal-to-metal Metal-to-metal stellited Soft seat EPDM NBR CR FFKM (Kalrez®) FKM (Viton®) Plastic seat SP PCTFE PTDE-FDA
12
Vespel-SP1 Kel-F Teflon
438
439
✓ ✓ ✓ ✓ ✓
✓ ✓ ✓ ✓ ✓
✓ ✓
✓ ✓ ✓
2
Material Code 3 – Body Material Chrome Steel 4 – Body Material Stainless Steel
3
Valve Code Identifies valve size, body material and orifice, refer to page 14.
4
Code for lifting device 2 – Screwed cap H2 4 – Packed lever H4
4374.3142
100 psig
Article No.
Set Pressure
V62
V71 Connections
LWN 471.10
Threaded Safety Relief Valves Spring Loaded How to Order – Numbering System
4
Options
Type 437 / 438 / 439
Option Code
• Inlet body stellited (Type 437 only) • Soft seal material (Type 438 / 439 only) NBR EPDM CR FKM FFKM • Heating jacket
L20
“N” “F” “K” “L” “C”
J30 J22 J21 J23 J20
Documentation
6
Code and Medium
Please select requested documentation:
1
Material test certificate DIN EN 10204-3.1 Parts Inlet body Outlet body Bonnet Cap / lever cover Disc
Option Code H 01 L 34 L 30 L 31 L 23
H29
H01 Options
LWN 471.11
L20
5
2
1 . 1 1
Code 1. ASME Section VIII 2. CE / VdTUEV 3. ASME Section VIII + CE / VdTUEV
2
Medium .1 Gases .2 Liquids .3 Steam .0 Steam / Gases / Liquids (valid only for CE / VdTUEV)
L30
1.1
Documentation
Code and Medium
13
Series 437
Threaded Safety Relief Valves Spring Loaded How to order · Article Numbers
How to order
Article Numbers Type 437 Type
Orifice [Inch2 ]
Type 437 standard version
Body Material Chrome Steel SA 479 430
Body Material Stainless Steel SA 479 316L
Set Pressure Range [psig]
Cap H2
Packed Lever H4
Set Pressure Range [psig]
Cap H2
Packed Lever H4
1.5 - 1348
4373.2602
4373.2604
1.5 - 986
4374.3142
4374.3144
1349 - 2610
4373.2612
4373.2614
987 - 2610
4374.3152
4374.3154
0.122 Type 437 long version 1
Article Numbers Type 438 Type
Orifice [Inch2 ]
Body Material Chrome Steel SA479 430
Body Material Stainless Steel SA 479 316L
Set Pressure Range [psig]
Cap H2
Packed Lever H4
Set Pressure Range [psig]
Cap H2
Packed Lever H4
7 - 1348
4383.2862
4383.2864
7 - 986
4384.2982
4384.2984
1349 - 2610
4383.2872
4383.2874
987 - 2610
4384.2992
4384.2994
Type 438 standard version 0.122 Type 438 long version1
Article Numbers Type 439 Type
Orifice [Inch2 ]
Type 439 standard version
0.122
Note:
14
1
Body Material Chrome Steel SA479 430
Body Material Stainless Steel SA 479 316L
Set Pressure Range [psig]
Cap H2
Packed Lever H4
Set Pressure Range [psig]
Cap H2
Packed Lever H4
1.5 - 232
4393.2882
4393.2884
1.5 - 232
4394.2892
4394.2894
The “long version” is a high pressure version with extended outlet body.
LWN 471.12
Threaded Safety Relief Valves Spring Loaded How to Order · Available Connections
Available Connections – Threaded ASME ANSI B1.20.1 Inlet
Size
Male NPT Option Code
Outlet Female NPT Option Code Size
Female NPT Size Option Code
1
V61
1
V58
1
V70
3
/4”
V62
3
/4”
V59
3
/4”
V77
1”
V63
1”
V60
1”
V71
/2”
/2”
/2”
Male thread
Available Connections – Flanged ASME ANSI B16.5 Inlet Size
1
/2”
3
/4”
1”
Notes:
1 2
Outlet
ANSI-Class
Option Code
150
Size
ANSI-Class
Option Code
V01
150
V24
300 600
V02
300 600
V13
900 1500
V03
900
V14
2500 150
V04 V05
– 150
– V15
300 600
V06
300 600
V16
900 1500
V07
900
V17
2500 150
V08 V09
– 150
– V18
300 600
V10
300 600 1
V19
900 1500
V11
900 2
V20
2500
V12
–
–
1
/2”
3
/4”
1”
Female thread
Maximum inlet flange class: #1500 Extended center to face dimension outlet: 4 3/4” (120 mm)
Different sizes and flange classes inlet and outlet can be combined. Standard flange facing is raised face (RF) according to ASME ANSI B16.5. RJ flange facing as well as other facings are available. Flanged version LWN 471.13
15
Series 437
Threaded Safety Relief Valves Spring Loaded Dimensions and Weights Threaded / Flanged Connections US Units
a
s s b
Male thread
Female thread
Flanged version
Dimensions and Weights Threaded Connections US Units Center to Face [Inch] Connection Size [Inch]
Orifice [Inch2 ] Male
1
1
/2” x /2” 1 ”x 3 ” /2 /4 3 ”x 3 ” /4 /4 3 ” x 1” /4
0.122
1” x 1” Note:
1
1 1 1 1 1
19
/64 19 /64 19 /64 25 /64 23 /64
c 55
Standard
Long Version
Female a
b
3
3
Hmax. 8 35/64 8 35/64 8 35/64 8 21/32 8 13/16
Hmax.1 9 3/8 9 3/8 9 3/8 9 31/64 9 41/64
1 /4 1 3/4 1 3/4 1 53/64 1 53/64
/64 55 /64 55 /64 55 /64 1 1/8
Weight [lbs]
Outlet
Inlet
a
Height [Inch]
1 1 1 1 1
/16 7 /16 7 /16 7 /16 7 /16
m
3.5
only Type 437 / 438
Dimensions and Weights Flanged Connections US Units Center to Face [Inch] Connection Size [Inch]
Orifice [Inch2 ]
Class 150 inlet a
outlet b
1
/2” 3 ” /4 1 2
16
only Type 437 / 438 for 1/2” ANSI 150: 3
s 11
0.122
1” Notes:
Flange Thickness [Inch]
4
31
/642 3 15/16
/16 11 /16 3 /4
Height [Inch]
Weight [lbs]
Class 300 / 600 s
Class 900/ 1500 s
Class 2500
Standard
Long Version
s
Hmax.
Hmax.1
m
1 1
1 5/16 1 1/4 1 9/16
1 7/16 1 9/16 1 5/8
10 7/16
17
15.5
1
1 /8
11
/64
15/16
LWN 471.14
Threaded Safety Relief Valves Spring Loaded Dimensions and Weights Threaded / Flanged Connections Metric Units
Dimensions and Weights Threaded Connections Metric Units Center to Face [mm] Connection Size [Inch]
Orifice [mm2 ]
Inlet Male
1
1
/2” x /2” 1 /2” x 3/4” 3 ”x 3 ” /4 /4 3 ” x 1” /4
78.5
1” x 1” Note:
1
Height [mm]
Weight [kg]
Outlet
Standard
Long Version
a
c
Female a
b
Hmax.
Hmax.1
m
33 33 33 36 35
22 22 22 22 27
44.5 44.5 44.5 46.5 46.5
30 37 37 37 37
195 195 195 198 197
216 216 216 219 218
1.6
only Type 437 / 438
Dimensions and Weights Flanged Connections Metric Units Center to Face [mm] Connection Size [Inch]
Orifice [mm2 ]
Class 150 inlet a
outlet b
1032
100
1
/2” /4”
3
78.5
1” Notes:
1 2
Flange Thickness [mm]
Height [mm]
Weight [kg]
Class 900 / 1500 s
Class 2500
Standard
Long Version
s
Class 300 / 600 s
s
Hmax.
Hmax.1
m
17 17 19
25 25 28
33 32 39
37 39 42
265
286
7
only Type 437 / 438 for 1/2” ANSI 150: 100 mm
LWN 471.15
17
Series 437
Threaded Safety Relief Valves Spring Loaded Pressure Temperature Ratings Type 437 / 438 / 439 US Units
Pressure Temperature Ratings Type 437 – US Units1 Valve Size
Orifice [Inch2 ]
Set Pressure Range [psig] Body Material
Standard Version
Long Version
Temperature Range according to ASME [°F]
min.
max.
min.
max.
min.
max.
/2” – 1”
0.122
Chrome Steel
1.5
1348
1349
2610
- 20
+ 428
/2” – 1”
0.122
Stainless Steel
1.5
986
987
2610
- 450
+ 536
1
1
Pressure Temperature Ratings Type 438 – US Units1 Valve Size
Orifice [Inch2 ]
Set Pressure Range [psig] Body Material
Standard Version
Long Version
Temperature Range according to ASME [°F ]2
min.
max.
min.
max.
min.
max.
/2” – 1”
0.122
Chrome Steel
15
1348
1349
2610
- 20
+ 356
/2” – 1”
0.122
Stainless Steel
15
986
987
2610
- 49
+ 356
1
1
Pressure Temperature Ratings Type 439 – US Units1 Valve Size
2
18
Standard Version min.
max.
min.
max.
0.122
Chrome Steel
1.5
232
- 20
+ 356
/2” – 1”
0.122
Stainless Steel
1.5
232
- 49
+ 356
1
1
Body Material
Temperature Range according to ASME [°F ]2
/2” – 1”
1
Notes:
Orifice [Inch2 ]
Set Pressure Range [psig]
For flanged versions the pressure temperature rating acc. to ANSI B 16.34 may supersede these limits The temperature is limited by the soft seal material, please refer to soft seal selection table on page 23.
LWN 471.16
Threaded Safety Relief Valves Spring Loaded Pressure Temperature Ratings Type 437 / 438 / 439 Metric Units
Pressure Temperature Ratings Type 437 – Metric Units1 Valve Size
Orifice [mm 2 ]
Set Pressure Range [bar] Body Material
Standard Version
Long Version
Temperature Range according to ASME [°C]
min.
max.
min.
max.
min.
max.
/2” – 1”
78.5
Chrome Steel
0.1
93
93
180
- 29
+ 220
/2” – 1”
78.5
Stainless Steel
0.1
68
68
180
- 268
+ 280
1
1
Pressure Temperature Ratings Type 438 – Metric Units1 Valve Size
Orifice [mm 2 ]
Set Pressure Range [bar] Body Material
Standard Version
Long Version
Temperature Range according to ASME [°C]2
min.
max.
min.
max.
min.
max.
/2” – 1”
78.5
Chrome Steel
1
93
93
180
- 29
+ 180
/2” – 1”
78.5
Stainless Steel
1
68
68
180
- 45
+ 180
1
1
Pressure Temperature Ratings Type 439 – Metric Units1 Valve Size
2
Standard Version min.
max.
min.
max.
78.5
Chrome Steel
0.1
16
- 29
+ 180
/2” – 1”
78.5
Stainless Steel
0.1
16
- 45
+ 180
1
1
Body Material
Temperature Range according to ASME [°C]2
/2” – 1”
1
Notes:
Orifice [mm 2 ]
Set Pressure Range [bar]
For flanged versions the pressure temperature rating acc. to ANSI B 16.34 may supersede these limits. The temperature is limited by the soft seal material, please refer to soft seal selection table on page 23.
LWN 471.17
19
Series 437
Threaded Safety Relief Valves Spring Loaded Accessories and Options · Caps and Levers
Accessories and Options Caps and Levers Series 437 is available with the following lever designs ● ●
Materials – subassembly Item 40 Body Material Chrome Steel
Cap H2 Packed lever H4, threaded design
The packed lever H4 provides some special features: ● operation by turning the knob anticlock wise ● remains in open position until the knob is screwed down again ● open and closed position is indicated
Item 1 2 2 12 13 14 16 19 22 23 24 25
Component Lever cover Cap Knob Spindle cap Bolt ring Pin O-ring Stopper Seal Seal wire Sealing nose
Cap H2 – Steel – – – – – – – Plastic 316SS 316L
Packed lever H4 AISI 430F – AISI 430F AISI 420 316SS 316SS Stainless Steel Viton AISI 430F Plastic 316SS 316L
Body Material Stainless Steel Cap H2 – 316L – – – – – – – Plastic 316SS 316L
Packed lever H4 316L – 316L 316L 316SS 316SS Stainless Steel Viton 316L Plastic 316SS 316L
22 16
2
14
12
2
19
1 Open
25
13
24
25
23
24 23
Closed
Cap H2
20
Packed lever H4
LWN 471.18
Threaded Safety Relief Valves Spring Loaded Accessories and Options · Metal Seat
Metal Seat (Type 437)
The LESER metal seats (disc and nozzle) are lapped to optical flatness to ensure a tight shut off. LESER safety relief valves are supplied with a standard leak tightness according to API 527. Type 4373 Standard material for the disc is a hardened stainless steel. The combination of a hard disc material and a softer seat material (316L) provides for improved wear resistance and longer product life. Type 4374 Disc and seat are provided in 316L material for highest corrosion resistance. Any other material which is available from bar stock can be supplied as well (e.g. Hastelloy®, Monel®, Alloy20,…).
57
57
7.3
7.3
7.1
7.1
7.2
7.2
1
1
Metal seat
Stellited sealing surfaces
Disc Materials subassembly Item 7 Item
Part Name
Type 4373 Body Material Chrome Steel
Type 4374 Body Material Stainless Steel
7.1
Disc
Hardened stainless steel Hardness 40 – 50 HRC
316L
7.2 7.3 57
Lifting aid Nut Pin
AISI 430F Steel 316
316L 316L 316
Item
Part Name
Optional stellited sealing surfaces
7.1
Disc
316L stellited Hardness 40 – 45 HRC
1
Inlet Body
316L stellited Hardness 40 – 45 HRC
LWN 471.19
Stellited sealing surfaces For high temperature applications, or applications with abrasive fluids wear resistant sealing surfaces are recommended. The sealing surfaces of the disc, seat or nozzle can be stellited by build-upwelding. The minimum thickness of the stellite is 0.06 inch. In addition to the corrosion resistance, the stellited surface also offers a high resistance to impact and sudden changes in temperature.
21
Series 437
Threaded Safety Relief Valves Spring Loaded Accessories and Options · Soft Seal
Soft Seal O-ring disc (Type 438) Vulcanized soft seal (Type 439) Disc with sealing plate (Type 437, optional)
57
Code letter 1
7.2
7.3
7.1
7.1 Code letter1
7.3
57 7.1
Code letter1
7.2
7.2
7.3
O-ring disc Type 438
Vulcanized soft seal disc Type 439
Disc with sealing plate Type 437
Application Type 437, 438 and 439 are provided with a soft seal disc for ● superior tightness ● maintained tightness close to the set pressure
Disc with vulcanized soft seal Type 439 with a vulcanized soft seat allows maintained tightness close to the set pressure especially at lower set pressures.
Disc with sealing plate For applications, where the increased tightness of a soft seal is required but the temperature is too low or too high for an o-ring-disc, e.g. liquefied gases.
Note:
Features and Benefits ● three different designs for extended application range ● minimized leakage and product loss ● large selection of soft seal materials ● simple replacement of soft seal ● standard ARP o-ring sizes ● one standard durometer per o-ring material ● reduced maintenance costs
Code letter: Please refer to soft seal selection table
1
For temperature limits and medium resistance refer to the soft seal selection table.
Materials – subassembly Item 7 Type 438 O-ring disc Item
22
Type 439 Vulcanized soft seal disc
Type 437 Disc with sealing plate
Part Name
Material
Part Name
Material
Part Name
Material
7.1
Disc
316L
Disc
316L with vulcanized soft seal, refer to soft seal selection table
Disc
316L
7.2
Lifting aid
316L
Lifting aid
316L
Lifting aid
7.3
O-ring
57
Pin
Refer to soft seal selection table –
Nut
316L
Sealing plate
Pin
316
Pin
316L Refer to soft seal selection table 316
LWN 471.20
Threaded Safety Relief Valves Spring Loaded Accessories and Options · Soft Seal
Type 437 Sealing plate Type 438 O-ring, Type 439 Vulcanized soft seal
Soft Seal Selection Abbrevation ASTM 1418
Designation Trade name
CR
Neoprene® (Chloroprene)
K
NBR
Buna - N® (Nitrile-Butadiene)
EPDM
Tmin Code- Option letter1 Code
Tmax Application 2
[ °F]
[ °C]
[ °F]
[ °C]
J21
-40
-40
212
100
Paraffin oil, silicone oil and grease, water and waterbased solvents, refrigerants, ozone
N
J30
-13
-25
230
110
Hydraulic oil, vegetable and animal grease and oil
Buna - EP® (Ethylene-Propylene Diene)
D
J22
-49
-45
302
150
Hot water and superheated steam up to 302°F, several organic and inorganic acids, silicone oil and grease, FDA compliant
FPM (FKM)
Viton® (Fluorocarbon)
L
J23
-4
-20
356
180
For high temperature service (no superheated steam), mineral oil and grease, silicone oil and grease, vegetable and animal grease and oil, ozone, FDA compliant compound available on request
FFKM3
Kalrez ® (Perfluoro)
C
J20
32
0
482
250
Nearly all chemicals, standard compound is Kalrez® 6375 with steam resistance, FDA compliant compound available on request
SP
VESPEL SP-1® (Polyimide)
T
J49
-454
-270
572
300
High temperature and high pressure applications (no steam), for chemical resistance refer to manufacturers guide
PCTFE
Kel-F® (Polychlorotrifluoroethylene)
G
J48
-454
-270
400
204
Cryogenic and refrigeration application, flammable media, gaseous oxygene application up to 725 psig at 140 ºF
PTFE
Teflon® (Polytetrafluoroethylene)
A
J44
-300
-184
302
150
Nearly all chemicals
Other
Notes:
1 2 3
Please LESER LLC
The code letters will be stamped on the disc. For soft seal materials other than listed the code letter X will be used. Pressure and temperature service must be considered in any case. For type 439: material is ISOLAST®.
Set Pressure Limits Sealing plate disc Pressure Range min.
Material
ed Trademarks
max.
[psig]
[bar]
[psig]
[bar]
VESPEL SP-1®
150
10
2610
180
Kel-F®
1.5
0.1
2610
180
Teflon®
LWN 471.21
1.5
0.1
145
10
Buna-N®, Teflon®, Viton®, VESPEL SP-1®, Neoprene®, Kalrez® Buna EP® Kel-F® ISOLAST®
Company
DuPont Bayer 3M Busak + Shamban
23
Series 437
Threaded Safety Relief Valves Spring Loaded Accessories and Options · Heating Jacket
Heating Jacket (Type 437)
Application Pressure relief valves in systems to be protected from media which are viscous, sticky or have a tendency to crystallize out of solution can be fitted with a heating jacket. For type 437 the outlet body is fitted with a fabricated heating jacket. The position of the heating connections is shown in figure 1.
Specifications of the heating jacket The operating data for the heating jacket are shown on a separate name plate. Operating Pressure
Operating Temperatures
pmax
Tmax
260 psig
410 °F
Available heating connections Connection
Option Code
Couplings FNPT
S02 + H29
Type 437 with heating jacket
24
LWN 471.22
Threaded Safety Relief Valves Spring Loaded Spare Parts · Discs · O-ring
Spare Parts
Discs – Type 437 metal to metal seat (Item 7) Valve Size
Orifice [Inch2 ]
Type 4373 Hardened stainless steel
Type 4374 Stainless Steel 316L
all
0.122
200.8739.9000
200.8749.9000
Discs – Type 438 soft seal with o-ring, disc material: 316L (Item 7) Valve Size
Orifice [Inch2 ]
all (standard version)
0.122
all (long version)
0.122
O-ring size ARP-no. 7
/16 x 3/32 ARP 111
7
/16 x 3/32 ARP 111
CR Neoprene
EPDM Ethylene
FPM (FKM) Viton
NBR Nitrile
FFKM Kalrez®
K
F
L
N
C
200.8349.9751
200.8349.9741
200.8349.9771
200.8349.9781
200.8349.9791
200.8549.9053
200.8549.9042
200.8549.9073
200.8549.9083
200.8549.9091
CR Neoprene
EPDM Ethylene
FPM (FKM) Viton
NBR Nitrile
FFKM Kalrez®
K
F
L
N
C
502.0107.2651
502.0107.2641
502.0107.2671
502.0107.2681
502.0107.2691
O-ring – Type 438 soft seal (Item 7.3) Valve Size
Orifice [Inch2 ]
all
0.122
O-ring size ARP-no. 7
/16 x 3/32 ARP 111
Discs – Type 439 with vulcanized soft seal (Item 7) Valve Size
Orifice [Inch2 ]
all
0.122
LWN 471.23
CR Neoprene
EPDM Ethylene
FPM (FKM) Viton
NBR Nitrile
FFKM ISOLAST®
K
F
L
N
C
200.9049.9051
200.9049.9041
200.9049.9071
200.9049.9081
200.9049.9091
25
Series 437
Threaded Safety Relief Valves Spring Loaded Spare Parts · Inlet Bodies
Inlet Bodies Types 437 Threaded connections – Material 316L (Item 1) Male NPT
Female NPT
Size
Orifice [Inch2 ]
Part Number
1
0.122
3
/4”
1”
/2”
Size
Orifice [Inch2 ]
Part Number
136.4449.9204
1
0.122
136.4449.9211
0.122
136.4549.9204
3
/4”
0.122
136.4549.9211
0.122
136.5849.9204
1”
0.122
136.5849.9211
/2”
Inlet Bodies Types 438 / 439 Threaded connections – Material 316L (Item 1) Male NPT Size
Orifice [Inch2 ]
Part Number
1
0.122
3
/4”
1”
/2”
26
Female NPT Size
Orifice [Inch2 ]
Part Number
136.4949.9204
1
0.122
136.4949.9211
0.122
136.5449.9204
3
/4”
0.122
136.5449.9211
0.122
136.6849.9204
1”
0.122
136.6849.9211
/2”
LWN 471.24
Threaded Safety Relief Valves Spring Loaded Approvals Series 437 · Rated slope
Approvals Series 437 Coefficient of Discharge 1 Country
Type
Fluid
Approval No.
437
S/G L S/G L
0.122
438 / 439
37213 37189 37190 37202
Code
Orifice
ASME Certified K
ASME Measured KD
0.458 0.333 0.406 0.322
0.509 0.370 0.451 0.358
United States
ASME Sec. VIII
Canada
CRN
437 / 438 / 439
S/G/L
OG0772.9C
0.122
Refer to ASME Sec. VIII
Country
Code
Type
Fluid
Approval No.
Orifice
Certified Coefficient of Discharge K dr
Europe
PED 97 / 23 / EC (CE-marking)
S/G L S/G L
072020111 Z0008/0/21-1
0.122
0.50 0.35 0.40 0.33
437 438 / 439
αw 437
AD 2000Merkblatt A2
Others
Notes:
1
438 / 439
S/G L S/G L
China: Russia:
CSBQTS DIN GOST
Ship classification authorities:
BV, DNV, GL, LROS, RINA
TUEV-SV 980
0.122
0.50 0.35 0.40 0.33
Acc. to ASME Sec. VIII the certified coefficient of discharge K is calculated by K = 0.9 * KD For sizing acc. to ASME Sec. VIII K must be used in the sizing equations.
Rated slope Within the capacity certification according to ASME Sec. VIII the coefficients of discharge for series 437 are issued as “rated slope values” instead of K values.
LWN 471.25
Rated slope values can be converted into K values. The table above shows the converted K values. The original rated slope values are listed below.
Fluid
Rated slope Type 437
Rated slope Type 438 /439
S
2.86 lb / hr / PSIA
2.55 lb / hr / PSIA
G
1.02 SCFM / PSIA
0.904 SCFM / PSIA
L
1.54 GPM √PSID
1.49 GPM / √PSID
27
Series 437
Threaded Safety Relief Valves Spring Loaded Capacities US Units · STEAM · AIR · WATER
Type 437 STEAM
AIR
WATER
ASME Section VIII [lb/ hr]
ASME Section VIII [S.C.F.M.]
ASME Section VIII [US - G.P.M.]
Capacities US Units
Capacities US Units
Set pressure [psig]
Orifice 0.122 Inch2
Set pressure [psig]
Orifice 0.122 Inch2
Set pressure [psig]
Orifice 0.122 Inch2
15 20 30 40 50 60 70 80 90 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 2000 2500 3000
94 108 137 168 200 232 263 295 326 358 421 484 547 611 674 737 800 863 926 990 1053 1116 1179 1242 1306 1621 1937 2253 2569
15 20 30 40 50 60 70 80 90 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 2000 2500 3000
33.5 38.6 48.9 60.1 71.4 82.7 93.9 105 117 128 150 173 195 218 241 263 286 308 331 353 376 398 421 443 466 579 692 804 917 1030 1143 1255 1368 1481 1594 1706 2270 2834
15 20 30 40 50 60 70 80 90 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 2000 2500 3000
6.54 7.39 8.86 10.2 11.4 12.5 13.5 14.5 15.3 16.2 17.7 19.1 20.5 21.7 22.9 24.0 25.0 26.1 27.1 28.0 28.9 29.8 30.7 31.5 32.3 36.2 39.6 42.8 45.7 48.5 51.1 53.6 56.0 58.3 60.5 62.6 72.3 80.8
Capacities for saturated steam according to ASME Section VIII (UV), based on set pressure plus 10 % overpressure. Capacities at 30 psig and bellow are based on 3 psig overpressure.
28
Capacities US Units
Capacities for air according to ASME Section VIII (UV), based on set pressure plus 10 % overpressure at 60 °F. Capacities at 30 psig and below are based on 3 psig overpressure.
Capacities for water according to ASME Section VIII (UV), based on set pressure plus 10 % overpressure at 68 °F. Capacities at 30 psig and below are based on 3 psig overpressure.
LWN 471.26
Threaded Safety Relief Valves Spring Loaded Capacities Metric Units · STEAM · AIR · WATER
Type 437 STEAM
AIR
WATER
ASME Section VIII [kg / hr]
ASME Section VIII [Sm3/ hr]
ASME Section VIII [103 kg/ hr]
Capacities Metric Units
Capacities Metric Units
Capacities Metric Units
Set pressure [bar]
Orifice 78.5 mm2
Set pressure [bar]
Orifice 78.5 mm2
Set pressure [bar]
Orifice 78.5 mm2
1 2 3 4 5 6 7 8 9 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200
42 61 81 102 123 144 165 185 206 227 269 310 352 393 435 476 518 560 601 643 684 726 768 809 851 1059 1267
1 2 3 4 5 6 7 8 9 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200
56 81 109 137 165 192 220 248 276 304 359 415 470 526 582 637 693 748 804 860 915 971 1026 1082 1138 1416 1694 1972 2250 2528 2806 3084 3362 3640 3918 4196 4474 4752 5030
1 2 3 4 5 6 7 8 9 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200
1.46 1.98 2.42 2.80 3.13 3.42 3.70 3.95 4.19 4.42 4.84 5.23 5.59 5.93 6.25 6.56 6.85 7.13 7.40 7.66 7.91 8.15 8.39 8.62 8.84 9.89 10.8 11.7 12.5 13.3 14.0 14.7 15.3 15.9 16.5 17.1 17.7 18.2 18.8
Capacities for saturated steam according to ASME Section VIII (UV), based on set pressure plus 10 % overpressure. Capacities at 2.07 bar (30 psig) and below are based on 0.207 bar (3 psig) overpressure.
LWN 471.27
Capacities for air according to ASME Section VIII (UV), based on set pressure plus 10 % overpressure at 16 °C. Capacities at 2.07 bar (30 psig) and below are based on 0.207 bar (3 psig) overpressure.
Capacities for water according to ASME Section VIII (UV), based on set pressure plus 10 % overpressure at 20 °C. Capacities at 2.07 bar (30 psig) and below are based on 0.207 bar (3 psig) overpressure.
29
Series 437
Threaded Safety Relief Valves Spring Loaded Capacities US Units · STEAM · AIR · WATER
Type 438 / 439 STEAM
AIR
WATER
ASME Section VIII [lb/ hr]
ASME Section VIII [S.C.F.M.]
ASME Section VIII [US - G.P.M.]
Capacities US Units
Capacities US Units
Set pressure [psig]
Orifice 0.122 Inch2
Set pressure [psig]
Orifice 0.122 Inch2
Set pressure [psig]
Orifice 0.122 Inch2
15 20 30 40 50 60 70 80 90 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 2000 2500
83 96 121 149 177 205 233 261 289 317 373 429 485 541 597 653 709 765 821 877 933 989 1045 1101 1157 1437
15 20 30 40 50 60 70 80 90 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 2000 2500
30 34 43 53 63 73 83 93 103 113 133 153 173 193 213 233 253 273 293 313 333 353 373 393 413 513 613 713 813 913 1013 1113 1213 1313 1413 1513 2012 2512
15 20 30 40 50 60 70 80 90 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 2000 2500
6.32 7.15 8.56 9.89 11.1 12.1 13.1 14.0 14.8 15.6 17.1 18.5 19.8 21.0 22.1 23.2 24.2 25.2 26.2 27.1 28.0 28.8 29.7 30.5 31.3 35.0 38.3 41.4 44.2 46.9 49.4 51.9 54.2 56.4 58.5 60.5 69.9 78.2
Capacities for saturated steam according to ASME Section VIII (UV), based on set pressure plus 10 % overpressure. Capacities at 30 psig and bellow are based on 3 psig overpressure.
30
Capacities US Units
Capacities for air according to ASME Section VIII (UV), based on set pressure plus 10 % overpressure at 60 °F. Capacities at 30 psig and below are based on 3 psig overpressure.
Capacities for water according to ASME Section VIII (UV), based on set pressure plus 10 % overpressure at 68 °F. Capacities at 30 psig and below are based on 3 psig overpressure.
LWN 471.28
Threaded Safety Relief Valves Spring Loaded Capacities Metric Units · STEAM · AIR · WATER
Type 438 / 439 STEAM
AIR
WATER
ASME Section VIII [kg / hr]
ASME Section VIII [Sm3/ hr]
ASME Section VIII [103 kg/ hr]
Capacities Metric Units
Capacities Metric Units
Capacities Metric Units
Set pressure [bar]
Orifice 78.5 mm2
Set pressure [bar]
Orifice 78.5 mm2
Set pressure [bar]
Orifice 78.5 mm2
1 2 3 4 5 6 7 8 9 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200
37 54 72 91 109 128 146 164 183 201 238 275 312 349 386 422 459 496 533 570 607 644 680 717 754
1 2 3 4 5 6 7 8 9 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200
50 72 97 121 146 171 195 220 244 269 318 368 417 466 516 565 614 663 713 762 811 861 910 959 1008 1255 1501 1748 1994 2241 2487 2734 2980 3227 3473 3720 3966 4213 4459
1 2 3 4 5 6 7 8 9 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200
1.42 1.91 2.34 2.70 3.02 3.31 3.58 3.82 4.06 4.28 4.68 5.06 5.41 5.74 6.05 6.34 6.62 6.89 7.15 7.40 7.65 7.88 8.11 8.33 8.55 9.56 10.5 11.3 12.1 12.8 13.5 14.2 14.8 15.4 16.0 16.6 17.1 17.6 18.1
Capacities for saturated steam according to ASME Section VIII (UV), based on set pressure plus 10 % overpressure. Capacities at 2.07 bar (30 psig) and below are based on 0.207 bar (3 psig) overpressure.
LWN 471.29
Capacities for air according to ASME Section VIII (UV), based on set pressure plus 10 % overpressure at 16 °C. Capacities at 2.07 bar (30 psig) and below are based on 0.207 bar (3 psig) overpressure.
Capacities for water according to ASME Section VIII (UV), based on set pressure plus 10 % overpressure at 20 °C. Capacities at 2.07 bar (30 psig) and below are based on 0.207 bar (3 psig) overpressure.
31
Series 437
Threaded Safety Relief Valves Spring Loaded Specification Sheet
636 326 9185
Please fax to: or your local representative
Specification Sheet
Company:
Phone:
Location:
Fax:
Name:
e-mail:
Reference:
Date:
GENERAL 1 ■ Item No.: 2 ■ Tag No.: 3 ■ Customer: 4 ● Equipment: 5 ● Enquiry/Order No.: 6 ● Delivery time: 7 ● Number of valves: 8 ● Number of spare valves:
9 ■ Basis of Selection: Code: ■ ASME VIII ■ PED 97/ 23 / EC (CE-marking) ■ other: 10 ■ Documentation: Material test report ■ inlet body ■ outlet body ■ other:
SERVICE CONDITIONS ■ Steam (S) 11 ■ Fluid and state: 12 ■ Molecular weight: 13 ● Coefficient C: 14 ● Ratio of specific heats k: 15 ● Compressibility factor Z: 16 ■ Spec. gravity / units: 17 ● Viscosity / units: 18 ■ Relieving temperature / units: 19 ■ Required capacity / units: VALVE CONSTRUCTION 27 ● Orifice Designation: 28 ● Connection inlet 29 ● Size: 30 ● Thread type or Flange class: ■ RJ 31 ● Facing type: ■ RF
20 21 22 23 24 25 26
3
of
■ Fire
■ Two phase
■ ...... % ■ 20 % ■ ...... %
■ other:
■ ■ ■ ■ ■
EPDM other: carbon steel other: Yes ■ No
■ cap H2
■ Please fill in these fields in any case. ● Please fill in these fields if possible. ▲ These fields will be completed by the supplier.
. Article No.
32
■ Liquid (L) Gas (G) Set pressure / units: Operating pressure / units: Cold diff. set pressure / units: Const. back pressure / units: Var. back pressure / units: ■ 10 % Overpressure: ■ 10 % Blowdown:
■ 4: Stainless steel 37 ● Soft seat ■ CR ■ NBR seal: ■ FPM ■ FFKM 38 ● Spring: ■ high temp. alloy steel ■ stainless steel 39 ● Comply with NACE MR 0175
SIZING AND SELECTION 42 ▲ Required orifice area / units: 43 ▲ Selected orifice area / units: 44 ▲ Coeff. of discharge: 45 ▲ Calculated capacity / units: Order Code
4
■ ■ ● ● ■ ■ ● ●
Connection outlet Size: Thread type or Flange class: ■ RF ■ RJ Facing type:
■ other:
MATERIALS 32 ● LESER Material Code ■ 3: Chrome steel 33 ● LESER Type: ■ 437 ■ 438 ■ 439 34 ■ Inlet body: 35 ● Outlet body: 36 ● Disc (Type 437): ■ SS hardened ■ 316L ● ■ other: ACCESSORIES AND OPTIONS 40 ■ Lifting lever: ■ packed H4 41 ● Others (specify):
Page:
Set Pressure
Connections
Options
Documentation
Code and Medium LWN 471.30
Threaded Safety Relief Valves Spring Loaded Series 459
Series 459
Type 459 / 462
Type 459 / 462 carbon steel LWN 471.31
33
Series 459
Threaded Safety Relief Valves Spring Loaded Materials Type 459
40
Materials Type 459
18
Threaded Connections 19
Item
Part Name
Type 4593 SG Iron
1 2
Inlet body Outlet body
SA 479 316L Gr. 60-40-18
Type 4592 Carbon Steel
Type 4594 Stainless Steel
SA 479 316L SA 479 316L
SA 479 316L SA 479 316L
Hardened Hardened stainless steel stainless steel
7
Disc
8
Guide
AISI 430F tenifer
9
Bonnet
Gr. 60-40-18
12
Spindle
AISI 420
Carbon Steel SA 105 AISI 420
14 16/17
Split ring Spring plate
AISI 430F Steel
AISI 430F Steel
316L 316L
18
Adjusting screw with bushing
AISI 430F PTFE
AISI 430F PTFE
316L PTFE
Lock nut Cap H2
Steel Steel
Steel Steel
316L 316L
Spring standard
Carbon Steel
Carbon Steel
Stainless Steel
19 40
54
Spring optional
AISI 430F tenifer
9 16 54
316L
12
316L
17 14
SA 479 316L 60
316L
8 57 61 7 2 1
Type 459
High temp. High temp. alloy steel or alloy steel or stainless steel stainless steel
57
Pin
316
316
316
40
60
Gasket
Graphite / 316L
Graphite / 316L
Graphite / 316L
18
61
Ball
316
316
316
19
SA 479 316L SA 479 316L 316L 316L 316L
SA 479 316L SA 479 316L 316L 316L 316L
Flanged Version 1 2 2.1 2.2 48
Inlet body SA 479 316L Outlet body Gr. 60-40-18 Outlet adaptor 316L Outlet flange 316L Inlet flange 316L
Schnitt 459 H2 male 4c
9 16 54 12 2.2
17
2.1
14 60 8 57 61 7 2 1 48
Type 459 Flanged version 34
LWN 471.32
Threaded Safety Relief Valves Spring Loaded Materials Type 459 – Balanced Bellows Design
Materials Type 459 – Balanced Bellows Design
40 18
Threaded Connections 19
Type 4592 Carbon Steel
Type 4594 Stainless Steel
SA 479 316L SA 479 316L
SA 479 316L SA 479 316L
Item
Part Name
Type 4593 SG Iron
1 2
Inlet body Outlet body
SA 479 316L Gr. 60-40-18
7
Disc
8
Guide
AISI 430F tenifer
AISI 430F tenifer
316L
9
Bonnet
Gr. 60-40-18
Carbon Steel SA 105
SA 479 316L
11 Bonnet spacer SA 479 316L 12 Spindle AISI 420 14 Split ring AISI 430F 15 Bellows 316L 16 / 17 Spring plate Steel
SA 479 316L AISI 420 AISI 430F 316L Steel
SA 479 316L 316L 316L 316L 316L
Hardened Hardened stainless steel stainless steel
54 12 17 14 60 11 15 60 57
Adjusting screw with bushing
AISI 430F PTFE
AISI 430F PTFE
316L PTFE
19 40
Lock nut Cap H2
Steel Steel
Steel Steel
316L 316L
Spring standard
Carbon Steel
Carbon Steel
Stainless Steel
Spring optional
16
316L
18
54
9
High temp. High temp. alloy steel or alloy steel or stainless steel stainless steel
57
Pin
316
316
316
60
Gasket
Graphite / 316L
Graphite / 316L
Graphite / 316L
61
Ball
316
316
316
SA 479 316L SA 479 316L 316L 316L 316L
SA 479 316L SA 479 316L 316L 316L 316L
61 7 2 1
Type 459 Balanced bellows design
Schnitt 459 H2 male SB 4c
Flanged Version 1 2 2.1 2.2 48
Inlet body SA 479 316L Outlet body Gr. 60-40-18 Outlet adaptor 316L Outlet flange 316L Inlet flange 316L
LWN 471.33
35
Series 459
Threaded Safety Relief Valves Spring Loaded Materials Type 462
40
Materials Type 462
18
Threaded Connections 19
Type 4622 Carbon Steel
Type 4624 Stainless Steel
Item
Part Name
Type 4623 SG Iron
1 2
Inlet body Outlet body
SA 479 316L Gr. 60-40-18
SA 479 316L SA 479 316L
SA 479 316L SA 479 316L
7
Disc with soft seal1
316L
316L
316L
12
8
Guide
AISI 430F tenifer
AISI 430F tenifer
316L
17
9
Bonnet
Gr. 60-40-18
Carbon Steel SA 105
SA 479 316L
12 14 16
Spindle Split ring Spring plate
AISI 420 AISI 430F Steel
AISI 420 AISI 430F Steel
316L 316L 316L
18
Adjusting screw with bushing
AISI 430F PTFE
AISI 430F PTFE
316L PTFE
19 40
Lock nut Cap H2
Steel Steel
Steel Steel
316L 316L
Spring standard
Carbon Steel
Carbon Steel
Stainless Steel
54
Spring optional
9 16 54
14 60 8 57 61 7 2 1
Type 462
High temp. High temp. alloy steel or alloy steel or stainless steel stainless steel Schnitt 462 H2 male 4c
57
Pin
316
316
316
60
Gasket
Graphite / 316L
Graphite / 316L
Graphite / 316L
40
61
Ball
316
316
316
18
Flanged Version 1 2 2.1 2.2 48 Note:
Inlet body SA 479 316L Outlet body Gr. 60-40-18 Outlet adaptor 316L Outlet flange 316L Inlet flange 316L CR NBR EPDM FPM FFKM
1
– – – – –
Neoprene Nitrile Ethylene / Propylene Fluorocarbon Kalrez®
SA 479 316L SA 479 316L 316L 316L 316L
9
SA 479 316L SA 479 316L 316L 316L 316L
16 54 12 2.2
2.1 17 60 8 7 2 1 48
Type 462 Flanged version 36
LWN 471.34
Threaded Safety Relief Valves Spring Loaded Materials Type 462 – Balanced Bellows Design
Materials Type 462 – Balanced Bellows Design
40 18
Threaded Connections
19
Type 4622 Carbon Steel
Type 4624 Stainless Steel
Item
Part Name
Type 4623 SG Iron
1 2
Inlet body Outlet body
SA 479 316L Gr. 60-40-18
SA 479 316L SA 479 316L
SA 479 316L SA 479 316L
7
Disc with soft seal1
316L
316L
316L
8
Guide
AISI 430F tenifer
AISI 430F tenifer
316L
9
Bonnet
Gr. 60-40-18
CarbonSteel SA 105
SA 479 316L
11 Bonnet spacer SA 479 316L 12 Spindle AISI 420 14 Split ring AISI 430F 15 Bellows 316L 16 / 17 Spring plate Steel
SA 479 316L AISI 420 AISI 430F 316L Steel
SA 479 316L 316L 316L 316L 316L
54 12 17
60 11 15 60 57
Adjusting screw with bushing
AISI 430F PTFE
AISI 430F PTFE
316L PTFE
19 40
Lock nut Cap H2
Steel Steel
Steel Steel
316L 316L
Spring standard
Carbon Steel
Carbon Steel
Stainless Steel
Spring optional
16
14
18
54
9
61 7 2 1
Type 462 Balanced bellows design
High temp. High temp. alloy steel or alloy steel or stainless steel stainless steel
57
Pin
316
316
316
60
Gasket
Graphite / 316L
Graphite / 316L
Graphite / 316L
61
Ball
316
316
316
SA 479 316L SA 479 316L 316L 316L 316L
SA 479 316L SA 479 316L 316L 316L 316L
Schnitt 462 H2 male SB 4c
Flanged Version 1 2 2.1 2.2 48 Note:
Inlet body SA 479 316L Outlet body Gr. 60-40-18 Outlet adaptor 316L Outlet flange 316L Inlet flange 316L CR NBR EPDM FPM FFKM
1
LWN 471.35
– – – – –
Neoprene Nitrile Ethylene / Propylene Fluorocarbon Kalrez®
37
Series 459
Threaded Safety Relief Valves Spring Loaded Materials Type 459 · Heavy Duty Design
40
Materials Type 459 Heavy Duty Design
18
Threaded Connections 19
Item
Part Name
Type 4594 Stainless Steel
1 2 7 8 9 12
Inlet body Outlet body Disc Guide Bonnet Spindle
SA 479 316L SA 479 316L 316L 316L SA 479 316L 316L
14 16/17
Split ring Spring plate
316L 316L
18
Adjusting screw with bushing
316L PTFE
Lock nut Cap H2 Spring
316L 316L Stainless Steel
Pin Gasket Ball
316 Graphite / 316L 316
19 40 54 57 60 61
9 16 54 12 17 14 60 8 57 61 7 2
Type 459 Heavy duty design
1
40 18 19 9 16 54 12 17 14 60 11 15 60 57 61 7 2 1
38
Type 459 Heavy duty design with balanced bellows
LWN 471.36
Threaded Safety Relief Valves Spring Loaded Material Options Type 4594
The Heavy Duty Design of Type 459 offers the possibility to easily obtain special material versions. The fact that all product wetted parts are machined from bar stock materials makes it easier and faster to fulfill almost all material requirements according to the material availability. Two special material levels are available: ● Level 1 special materials for the trim = wetted parts in closed position ● Level 2 special material for trim and outlet = wetted parts in open position
Material Options Type 4594 Heavy Duty Design Level 1 Trim Item
Part Name
Item
Part Name
1
Inlet body
1
Inlet body
7
Disc
2
Outlet body
7
Disc
11
Bonnet spacer
15
Bellows1
57
Pin
61
Ball
Option Code
Material
Option Code
Material
Grade HA
Hastelloy®
Grade HB
Hastelloy®
Grade MA
Monel®
Grade MB
Monel®
Grade DA
Duplex®
Grade DB
Duplex®
Note:
LWN 471.37
Level 2 Trim and Outlet
1
Available in 316L, Duplex®, Hastelloy®, Inconel®, Monel®. Other materials on request.
39
Series 459
Threaded Safety Relief Valves Spring Loaded How to Order – Numbering System
How to Order Numbering System
1
Article Number 1
2
3
Set Pressure
Please state unit (in gauge)!
4
Please do not exceed pressure range mentioned in the spring charts.
459 4 . 255 2 1
2
3
Connections
Please refer to table “Available Connections” on page 43. Please state one option code for each, inlet and outlet.
Type 459 / 462 Type
Types of sealing 459 Metal seat Metal-to-metal Metal-to-metal stellited Soft seat EPDM NBR CR FFKM (Kalrez®) FKM (Viton®) Plastic seat SP PCTFE PTDE-FDA
2
Vespel-SP1 Kel-F Teflon
462
✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
Material Code 2 – Body Material Carbon Steel 3 – Body Material SG iron 4 – Body Material Stainless Steel
3 Valve Code Identifies valve size, body material and orifice, refer to page 14.
4 Code for lifting device 2 – Screwed cap H2 3 – Plain lever H3 4 – Packed lever H4
40
4594.2552
100 psig
Article No.
Set Pressure
V62
V71 Connections
LWN 471.38
Threaded Safety Relief Valves Spring Loaded How to Order – Numbering System
4
Options
Type 459 / 462
Option Code
• Outlet body L19 heavy duty design (Type 459) • Inlet body stellited L20 (Type 459) • Soft seal material NBR “N” J30 (Type 462) EPDM “F” J22 CR “K” J21 FKM “L” J23 FFKM “C” J20 • Stainless steel bellows p < 580 psig J78 p > 580 psig J78 + J55 Hastelloy ® J81 • Elastomer bellows J79 • Heating jacket H29 • Heating jacket H33 bonnet spacer • High temperature X01 alloy spring • Stainless steel spring X04
J78
Documentation
6
Code and Medium
Please select requested documentation:
1
Material test certificate DIN EN 10204-3.1 Parts Inlet body Outlet body Bonnet Cap / lever cover Disc
H01 Options
LWN 471.39
5
Option Code H 01 L 34 L 30 L 31 L 23
2
1 . 1 1
Code 1. ASME Section VIII 2. CE / VdTUEV 3. ASME Section VIII + CE / VdTUEV
2
Medium .1 Gases .2 Liquids .3 Steam .0 Steam / Gases / Liquids (valid only for CE / VdTUEV)
L30
1.1
Documentation
Code and Medium
41
Series 459
Threaded Safety Relief Valves Spring Loaded How to Order · Article Numbers
How to order
Article Numbers Type 459 Type 4593 Body Material SG Iron
Type 4592 Body Material Carbon Steel
Type 4594 Body Material Stainless Steel
Orifice [Inch2 ]
Cap H2
Packed Lever H4
Plain Lever H3
Cap H2
Packed Lever H4
Plain Lever H3
Cap H2
Packed Lever H4
0.099
4593.2502
4593.2504
4593.2503
4592.2472
4592.2474
4592.2473
4594.2552
4594.2554
0.206
4593.2512
4593.2514
4593.2513
4592.2482
4592.2484
4592.2483
4594.2562
4594.2564
0.373
4593.2522
4593.2524
4593.2523
4592.2492
4592.2494
4592.2493
4594.2572
4594.2574
Article Numbers Type 462 Type 4623 Body Material SG Iron
Type 4622 Body Material Carbon Steel
Type 4624 Body Material Stainless Steel
Orifice [Inch2 ]
Cap H2
Packed Lever H4
Plain Lever H3
Cap H2
Packed Lever H4
Plain Lever H3
Cap H2
Packed Lever H4
0.099
4623.2902
4623.2904
4623.2903
4622.3772
4622.3774
4622.3773
4624.2952
4624.2954
0.206
4623.2912
4623.2914
4623.2913
4622.3782
4622.3784
4622.3783
4624.2962
4624.2964
0.373
4623.2922
4623.2924
4623.2923
4622.3792
4622.3794
4622.3793
4624.2972
4624.2974
Article Numbers Type 459 Heavy duty design
Article Numbers Type 462 Heavy duty design
Type 4594 Body Material Stainless Steel Orifice [Inch2 ]
Cap H2
Packed Lever H4
0.044 (L) 0.044 (S/G) 0.099 0.206
4594.2532 1 4594.2542 2 4594.2582 4594.2592
4594.2534 1 4594.2544 2 4594.2584 4594.2594
Notes:
1 2
42
Type 4624 Body Material Stainless Steel Orifice [Inch2 ]
Cap H2
Packed Lever H4
0.099
4624.2252
4624.2254
0.206
4624.2272
4624.2274
Liquid service Steam and gas service
LWN 471.40
Threaded Safety Relief Valves Spring Loaded How to Order · Available Connections
Male thread
Female thread
Flanged version
Available Connections – Threaded Option codes Schnitt 459 H2 female
Inlet Male NPT
Schnitt 459 H2 male 4cOrifice [Inch2 ]
Orifice [Inch2 ] Size
0.044
0.099
0.206
0.373
1
V61
V61
V61
–
3
/4”
V62
V62
V62
–
1”
V63
V63
V63
11/2”
–
–
–
/2”
Outlet4cFemale NPT
Inlet Female NPT
Size
Orifice [Inch2 ]
0.044
0.099
0.206
0.373
1
V58
V58
V58
–
3
/4”
V59
V59
V59
V59
V63
1”
V60
V60
V60
V64
11/2”
–
–
–
/2”
Size
0.044
0.099
0.206
0.373
1
–
–
–
–
3
/4”
–
–
–
–
V60
1”
V71
V71
V71
–
V75
11/2”
–
V72
V72
V72
/2”
Available Connections – Flanged ANSI B16.5 Option codes Inlet Orifice [Inch2 ] Size
ANSI-Class 150 300 / 600 1 ” /2 900 / 1500 2500 150 300 / 600 3 ” /4 900 / 1500 2500 150 300 / 600 1” 900 / 1500 2500 – 11/2” – – Notes:
1 2
0.044 V01 V02 V03 V04 V05 V06 V07 V08 V09 V10 V11 V12 – – –
0.099 V01 V02 V03 V04 V05 V06 V07 V08 V09 V10 V11 V12 – – –
0.206 – – – – V05 V06 V07 V08 V09 V10 V11 V12 – – –
Outlet Orifice [Inch2 ] 0.373 – – – – V05 V06 V07 V08 V09 V10 V11 V12 – – –
Size
ANSI-Class – – – – – – – – – – 150 300 / 6001 1” 9002 – 150 11/2” 300 / 600 900
0.044 – – – – – – – – V18 V19 V20 – – – –
0.099 – – – – – – – – V18 V19 V20 – V21 V22 V23
0.206 – – – – – – – – V18 V19 V20 – V21 V22 V23
0.373 – – – – – – – – – – – – V21 V22 V23
maximum inlet flange class: #1500 extended center to face dimension outlet: 4 3/4” (120 mm)
LWN 471.41
43
Series 459
Threaded Safety Relief Valves Spring Loaded Dimensions and Weights Type 459 / 462
Male thread
Female thread
Flanged version
Dimensions and Weights Threaded Connections US Units Center to Face [Inch] Connection Size [Inch]
Inlet Male a
1
/2” x 1” 3 ” x 1” /4 1” x 1” 3
/4” x 11/2” 1” x 11/2” 11/2” x 11/2” Note:
1
Female a 2 11/64 2 11/64 2 11/64 2 1/4 2 1/4 2 63/64
c
3
1 /4 1 3/4 1 47/64 1 29/32 1 57/64 2 1/8
55
/64 55 /64 1 1/8 55 /64 1 1/8 1 1/8
Height [Inch]
Weight [lbs]
Outlet
Standard
Bellows
b
Hmax. 11 11/16 11 11/16 11 27/32 11 27/32 12 1/64 12 1/8
Hmax.1 12 61/64 12 61/64 13 7/64 13 7/64 13 17/64 13 25/64
2
61
/64
m 5.7 5.7 5.7 6.6 6.6 6.6
not for orifice 0.044 inch2
Dimensions and Weights Flanged Connections US Units Center to Face [Inch] Orifice [Inch2]
0.044 0.099 0.206 0.373
44
Inlet 150 RF – 2500 RF a
300 RJ – 1500 RJ a
2500 RJ
15
7
31
3 /16 3 15/16 3 15/16 4 9/64
4 4 4 4
/32 /32 7 /32 9 /16 7
a 4 4 4 4
/64 /64 31 /64 27 /32
Height [Inch]
Weight [lbs]
Outlet
Standard
Bellows
150 RF – 600 RF b
H
H
m
63
– 14 1/4 14 1/4 14 3/8
17.6
31
3
15
/16
12 /64 12 63/64 12 63/64 13 7/64
LWN 471.42
Threaded Safety Relief Valves Spring Loaded Dimensions and Weights Type 459 / 462 · Flange Thickness
Dimensions and Weights Threaded Connections Metric Units Center to Face [mm] Connection Size [Inch]
Inlet Male a 45 45 44 49 48 54
1
/2” x 1” 3 /4” x 1” 1” x 1” 3
/4” x 11/2” 1” x 11/2” 11/2” x 11/2” Note:
1
Female a 55 55 55 57 57 76
c 22 22 27 22 27 27
Height [mm]
Weight [kg]
Outlet
Standard
Bellows
b
Hmax.
Hmax.1
m
75
275 275 274 279 278 281
307 307 306 311 310 313
2.6 2.6 2.6 3 3 3
not for orifice 0.044 inch2
Dimensions and Weights Flanged Connections Metric Units Center to Face [mm] Orifice [mm2]
Inlet 150 RF – 2500 RF a
300 RJ – 1500 RJ a
2500 RJ
100 100 100 105
107 107 107 116
114 114 114
28.2 63.6 133 241
a
Height [mm] Outlet
Standard
Bellows
150 RF – 600 RF b
Hmax.
Hmax.
330 330 330 333
–
100
123
Flange Thickness US Units
Class 150 s
1
/2” /4”
3
1” 11/2”
LWN 471.43
5
/8 /16 3 /4 15 /16
11
Flange Thickness [mm]
Class 900/1500
s
s
s
1
7
/16 /16 1 1/8 1 3/16 15
8
Flange Thickness Metric Units
Class 300/600
15
m
362 362 365
Flange Thickness [Inch] Connection Size [Inch]
Weight [kg]
1 /4 1 1/4 1 9/16 1 9/16
Class 2500
1 /16 1 1/2 1 5/8 2
Connection Size [Inch] 1
/2” /4”
3
1” 11/2”
Class 150
Class 300/600
Class 900/1500
Class 2500
s
s
s
s
17 17 19 24
25 25 28 31
33 32 39 40
37 39 42 53
45
Series 459
Threaded Safety Relief Valves Spring Loaded Pressure Temperature Ratings US Units – Type 459 / 462
Pressure Temperature Ratings US Units1 – Type 459 Set Pressure Range [psig]
Notes:
Orifice [Inch2]
min.
0.044 0.099 0.206 0.373
150 21.8 2.9 2.9
1 2 3
max. 8550 (11600)3 5800 2900 1450
Temperature Range acc. to ASME [°F] min. with bellows – 43.5 43.5 43.5
Carbon Steel
SG Iron
Stainless Steel
min.
max.
min.
max.
min.
max.
- 20
+ 572
- 20
+ 800 2
- 300
+ 800 2
Stainless Steel Heavy Duty Design
min.
max.
- 450 + 1000 2
for flanged versions the pressure temperature rating acc. to ANSI B 16.34 may supersede these limits above 572 °F / 300 °C stainless steel bellows is required for spring heat protection value in brackets: special spring required, expect longer lead time
Pressure Temperature Ratings US Units1 – Type 462 Set Pressure Range [psig]
Notes:
Orifice [Inch2]
min.
max.
min. with bellows
0.099 0.206 0.373
7.3 2.9 2.9
5075 2900 1450
43.5 43.5 43.5
1 2
46
Temperature Range acc. to ASME [°F] 2 SG Iron Carbon Steel Stainless Steel min. max. min. max. min. max. - 20
+ 356
- 20
+ 356
- 49
+ 356
for flanged versions the pressure temperature rating acc. to ANSI B 16.34 may supersede these limits the temperature is limited by the soft seal material, please refer to soft seal selection table on page 53
LWN 471.44
Threaded Safety Relief Valves Spring Loaded Pressure Temperature Ratings Metric Units – Type 459 / 462
Pressure Temperature Ratings Metric Units1 – Type 459 Set Pressure Range [bar]
Notes:
Orifice [mm2]
min.
28.2 63.6 133 241
10 1.5 0.2 0.2
1 2 3
min. with bellows
max. 590 (800) 400 200 100
Temperature Range acc. to ASME [°C]
3
– 3 3 3
Carbon Steel
SG Iron
Stainless Steel
Stainless Steel Heavy Duty Design
min.
max.
min.
max.
min.
max.
min.
max.
- 29
+ 300
- 29
+ 427 2
- 184
+ 427 2
- 268
+ 538 2
for flanged versions the pressure temperature rating acc. to ANSI B 16.34 may supersede these limits above 572 °F / 300 °C stainless steel bellows is required for spring heat protection value in brackets: special spring required, expect longer lead time
Pressure Temperature Ratings Metric Units1 – Type 462 Set Pressure Range [bar]
Notes:
Orifice [mm2]
min.
max.
min. with bellows
63.6 133 241
0.5 0.2 0.2
350 200 100
3 3 3
1 2
Temperature Range acc. to ASME [°C] 2 SG Iron Carbon Steel Stainless Steel min. max. min. max. min. max. - 29
+ 180
- 29
+ 180
- 45
+ 180
for flanged versions the pressure temperature rating acc. to ANSI B 16.34 may supersede these limits the temperature is limited by the soft seal material, please refer to soft seal selection table on page 53
LWN 471.45
47
Series 459
Threaded Safety Relief Valves Spring Loaded Accessories and Options · Caps and Levers
Accessories and Options Caps and Levers Series 459 is available with the following lever designs ● ● ● ●
Cap H2 Plain lever H3 Packed lever H4 Test gag, available for cap H2 and packed lever H4
Materials subassembly Item 40 Body Material Carbon Steel or SG Iron
Body Material Stainless Steel
Item
Component
Cap H2
Plain Lever H3
Packed Lever H4
Cap H2
Packed Lever H4
1.1 2 3a 3b 4 / 1.4 1.5 6 / 1.6 1.7 1.8 1.9 1.9 1.10 1.10 1.11 12 13 14 22 23 24 25 93 93.5
Lever cover Cap Spacer Hex screw Shaft / Bolt Lifting fork Lever Washer Nut O-ring Bushing Retaining clip Nut ring Spindle cap Pin Retaining clip Plug Seal Seal wire Sealing nose Test gag Washer
– Steel – – – – – – – – – – – – – – – – Plastic 316SS 316L 316SS Fiber
Gr. 60-40-18 – – B7 Steel Carbon Steel Carbon Steel Carbon Steel – – – Carbon Steel – – Carbon Steel 316SS 316SS Plastic Plastic 316SS – – –
Gr. 60-40-18 – 316L – Steel Carbon Steel Carbon Steel Carbon Steel 2H Viton – Carbon Steel – Carbon Steel Carbon Steel 316SS 316SS – Plastic 316SS – 316SS Fiber
– 316L – – – – – – – – – – – – – – – – Plastic 316SS 316L 316SS Fiber
CF8M – 316L – 316L 316L 316SS 316SS 8M – Graphite – 316L 316SS 316L 316SS 316SS – Plastic 316SS – 316SS Fiber
12
2
14
6
25
13 3b
24
1
23
22 23 24
10 4
Cap H2 48
Plain lever H3 LWN 471.46
Threaded Safety Relief Valves Spring Loaded Accessories and Options · Caps and Levers
93
93.5
1 12 14
13 1.5 1.6
24 23
3a
1.8 1.7
BLOCKED. Remove after testing!
1.10 1.11 1.9 1.4
Packed lever H4
LWN 471.47
Test gag
49
Series 459
Threaded Safety Relief Valves Spring Loaded Accessories and Options · Balanced Bellows
Balanced Bellows
Application Bellows protect the guides, moving parts and the spring from dirt, corrosion, impurities or temperature to guarantee the proper function of the safety relief valve. Additionally they provide for back pressure compensation 1.
Materials and Limits of Application Standard
Heavy Duty
Hastelloy®
Inconel®
Bellows material Bellows t materials
316L 316L
316L 316L
Hastelloy® C Hastelloy® C
Inconel® Inconel®
Option codes
J78
J78 + J55
J81 (Hastelloy®)
J78 + S15 (Inconel®)
Minimum set pressure limit
43.5 psig
580 psig
Maximum set pressure limit
580 psig
acc. to set pressure limit of the valve
Superimposed back pressure limit 3
232 psig
580 psig
Design Series 459 with balanced bellows is provided with a bonnet spacer to house the bellows. The spacer serves for cooling and shields the bellows against turbulences during discharge to avoid vibration and to guarantee longer lifetime.
Note s:
Built up back pressure limit 3
max. 35 % of set pressure, not to exceed the maximum bellows back pressure limit
Temperature limits (Type 459)
up to 752 °F
The bellows for type 459/462 is back pressure compensating for orifice size 0.206 Inch2 (133 mm2). It is over compensating for orifice size 0.099 Inch2 (63,6 mm2) and under compensating for orifice size 0.373 Inch2 (241 mm2). Please ask factory for details. 2 Type 4594 with heavy duty body: up to 1022 °F, the temperature limits for type 462 depend on other parts e.g. soft seal materials. 3 The so called built up back pressure limit defines limit for which the proper function of the pressure relief valve is ensured. The superimposed back pressure limit of a bellows refers only to the static stability of the bellows design and does not consider the influence of the backpressure on the opening and closing of a pressure relief valve. 1
Conversion kits are available for an easy change from a conventional design to a balanced bellows design. Conversion kits contain all necessary parts which must be replaced (bellows, spacer, spindle and gaskets). Please refer to page 56 Spare Parts.
50
LWN 471.48
Threaded Safety Relief Valves Spring Loaded Accessories and Options · Metal Seat
Metal Seat (Type 459)
The LESER metal seats (disc and nozzle) are lapped to optical flatness to ensure a tight shut off. LESER safety relief valves are supplied with a standard leak tightness according to API 527. Type 4592 / Type 4593 Standard material for the disc is a hardened stainless steel. The combination of a hard disc material and a softer seat material (316L) provides for improved wear resistance and longer product life.
57
57
7.1
7.1 7.3
7.3 7.2
7.2
1
1
Type 4594 Disc and seat are provided in 316L material for highest corrosion resistance. Any other material which is available from bar stock can be supplied as Monel®, well (e.g. Hastelloy®, Alloy20,…). Metal seat
Stellited sealing surfaces
Materials subassembly Item 7 Item
Part Name
Type 4593 Body Material SG Iron
Type 4592 Body Material Carbon Steel
Type 4594 Body Material Stainless Steel
7.1
Disc
Hardened stainless steel Hardness 40 – 50 HRC
Hardened stainless steel Hardness 40 – 50 HRC
316L
7.2 7.3 57
Lifting aid Retaining clip Pin
316L 316L 316
316L 316L 316
316L 316L 316
Item
Part Name
Optional stellited sealing surfaces
7.1
Disc
316L stellited Hardness 40 – 45 HRC
1
Inlet Body
316L stellited Hardness 40 – 45 HRC
LWN 471.49
Discs with stellited sealing surfaces For high temperature applications above 842 °F, or applications with abrasive fluids wear resistant sealing surfaces are recommended. The sealing surfaces of the disc, seat or nozzle can be stellited by build-upwelding. The minimum thickness of the stellite is 0.06 inch. In addition to the corrosion resistance, the stellited surface also offers a high resistance to impact and sudden changes in temperature.
51
Series 459
Threaded Safety Relief Valves Spring Loaded Accessories and Options · Soft Seal
Soft Seal O-ring disc (Type 462) Disc with sealing plate (Type 459, optional) Application Type 459 and 462 are provided with a soft seal disc for ● superior tightness ● maintained tightness close to the set pressure
57
57
2
2
Features and Benefits ● two designs with o-ring or sealing plate for extended application range ● minimized leakage and product loss ● large selection of soft seal materials ● simple replacement of soft seal ● standard ARP o-ring sizes ● reduced maintenance costs ● one standard durometer per o-ring material
3
3
1
1
4
4
For temperature limits and medium resistance refer to the soft seal selection table.
Disc with sealing plate Type 459
O-ring disc Type 462
Disc with sealing plate For applications, where the increased tightness of a soft seat seal is required but the temperature is too low or too high for an o-ring-disc, e.g. liquefied gases.
Materials subassembly Item 7 Type 462 O-ring disc
Item
52
Type 459 Disc with sealing plate
Item
1 2 3
Part Name Disc Lifting aid Pin
Material 316L 316L 316
1 2 3
Part Name Disc Lifting aid Retaining clip
Material 316L 316L 316L
4
O-ring
Refer to soft seal selection table
4
Sealing plate
Refer to soft seal selection table
57
Pin
316
57
Pin
316
LWN 471.50
Threaded Safety Relief Valves Spring Loaded Accessories and Options · Soft Seal
Soft Seal Selection Designation Trade name
Type 459 Sealing plate
Type 462 O-ring
Code
Code- Option letter 1 Code
Tmax
Tmin
Application 2 [ °F]
[ °C]
[ °F]
[ °C]
CR
Neoprene® (Chloroprene)
K
J21
-40
-40
212
100
Paraffin oil, silicone oil and grease, water and waterbased solvents, refrigerants, ozone
NBR
Buna - N® (Nitrile-Butadiene)
N
J30
-13
-25
230
110
Hydraulic oil, vegetable and animal grease and oil
EPDM
Buna - EP® (Ethylene-Propylene Diene)
D
J22
-49
-45
302
150
Hot water and superheated steam up to 302°F, several organic and inorganic acids, silicone oil and grease, FDA compliant
FPM (FKM)
Viton® (Fluorocarbon)
L
J23
-4
-20
356
180
For high temperature service (no superheated steam), mineral oil and grease, silicone oil and grease, vegetable and animal grease and oil, ozone, FDA compliant compound available on request
FFKM
Kalrez ® (Perfluoro)
C
J20
32
0
482
250
Nearly all chemicals, standard compound is Kalrez® 6375 with steam resistance, FDA compliant compound available on request
SP
VESPEL SP-1® 1 (Polyimide)
T
J49
-454
-270
572
300
High temperature and high pressure applications (no steam), for chemical resistance refer to manufacturers guide
PCTFE
Kel-F® (Polychlorotrifluoroethylene)
G
J48
-454
-270
400
204
Cryogenic and refrigeration application, flammable media, gaseous oxygene application up to 725 psig at 140 ºF
PTFE
Teflon® (Polytetrafluoroethylene)
A
J44
-300
-184
302
150
Nearly all chemicals
Other
Notes:
1 2
Please LESER LLC
The code letters will be stamped on the retainer (Item 2). For soft seal materials other than listed the code letter X will be used. Pressure and temperature service must be considered in any case.
Set Pressure Limits Sealing plate disc Pressure Range min.
Material VESPEL SP-1®
ed Trademarks
max.
[psig]
[bar]
[psig]
[bar]
150
10
5800
400
2.9
0.2
4350
300
Teflon®
2.9
0.2
145
10
LWN 471.51
Viton®, VESPEL SP-1®, Neoprene®, Kalrez® Kel-F®
Company
Teflon®,
Buna EP®
®
Kel-F
Buna-N®,
DuPont Bayer 3M
53
Series 459
Threaded Safety Relief Valves Spring Loaded Accessories and Options · Heating Jacket
Heating Jacket
Application Pressure relief valves in systems to be protected from media which are viscous, sticky or have a tendency to crystallize out of solution can be fitted with a heating jacket. For type 459 the outlet body is fitted with a fabricated heating jacket. The position of the heating connections is shown in the drawing.
Balanced Bellows Design For safety relief valves with balanced bellows, the bonnet spacer required to house the bellows is fitted with an additional heating jacket. Both heating jackets are ed by a tubing.
Specifications of the heating jacket The operating data for the heating jacket are shown on a separate name plate.
Operating Pressure
Operating Temperatures
pmax
Tmax
260 psig
572 °F
Available heating connections Type 459 with heating jacket
54
Connection
Option Code
Couplings FNPT
H29
LWN 471.52
Threaded Safety Relief Valves Spring Loaded Accessories and Options · Lift Indicator
Lift Indicator (proximity switch)
Lift indicators are an important component for automation. They are used to monitor operating status. As an option, Series 459 can be provided with an inductive proximity switch. The lift indicator will indicate an opening of the pressure relief valve when the vessel pressure has increased so that the valve opens with a “pop”. LESER provides DC proximity switches type “N” using two-wire technology. These intrinsically safe proximity switches can be used in explosion hazard area zone 0. Other types of switches can be used as well.
B
A
94
The lift indicator option is available for series 459 in combination with the packed lever H4 either with or without proximity switch. The connection size is M18 x 1. A = closed position B = open position
LWN 471.53
Option
Option Code
Lifting device H4 with adaptor for lift indicator M18 x 1
J39
Lift indicator type PEPPERL + FUCHS NJ5-18GK-N (5 V to 25 V d.c.)
J93
55
Series 459
Threaded Safety Relief Valves Spring Loaded Spare Parts · Discs
Spare Parts
Discs – Type 459 metal to metal seat (Item 7) Type 4594 316L
Orifice [Inch2 ]
Type 4592 / 4593 Hardened stainless steel
0.044
–
0.099
200.2039.9000
200.2049.9000
0.206
200.2139.9000
200.2149.9000
0.373
200.2239.9000
200.2249.9000
Steam and gas service: 200.3269.9118 Liquid service: 200.3969.9118
Discs – Type 462 soft seal, disc material: 316L (Item 7) Orifice [Inch2 ]
O-ring size ARP-no. 1
0.099
/2 x 3/32
ARP 112 9
0.206
/16 x 3/32 ARP 113
13
0.373
/16 x 3/32 ARP 117
CR Neoprene
EPDM Ethylene
FPM (FKM) Viton®
NBR Nitrile
FFKM Kalrez®
K
D
L
N
C
200.9349.9051
200.9349.9041
200.9349.9071
200.9349.9081
200.9349.9091
200.4549.9051
200.4549.9041
200.4549.9071
200.4549.9081
On Request
200.4649.9051
200.4649.9041
200.4649.9071
200.4649.9081
On Request
CR Neoprene
EPDM Ethylene
FPM (FKM) Viton®
NBR Nitrile
FFKM Kalrez®
K
D
L
N
C
502.0123.2651
502.0123.2641
502.0123.2671
502.0123.2681
502.0123.2691
502.0139.2651
502.0139.2641
502.0139.2671
502.0139.2681
On Request
502.0202.2651
502.0202.2641
502.0202.2671
502.0202.2681
On Request
O-ring – Type 462 soft seal (Item 7) Orifice [Inch2 ]
O-ring size ARP-no. 1
0.099
3
/2 x /32 ARP 112
9
0.207
/16 x 3/32 ARP 113
13
0.373
56
/16 x 3/32 ARP 117
LWN 471.54
Threaded Safety Relief Valves Spring Loaded Spare Parts · Inlet Bodies · Inlet Bodies and Flanges · Bellows · Gaskets
Inlet Bodies Type 459 / 462 Threaded connections – Material 316L (Item 1) Male NPT Orifice [Inch2 ]
Size 1 ” /2 3 ” /4 1” 3 ” /4 1” 11/2” 3 ” /4 1” 11/2” 1” 11/2”
Female NPT Inlet Body 136.6969.9204 136.7069.9204 136.7169.9204 136.7549.9204
0.044
0.099
136.7649.9204 136.7849.9204 136.8049.9204
0.206
136.8149.9204 136.8349.9204 136.3649.9204
0.373
Size 1 ” /2 3 ” /4 1” 3 ” /4 1” 11/2” 3 ” /4 1” 11/2” 1” 11/2”
136.8649.9204
Orifice [Inch2 ] 0.044
0.099
0.206
0.373
Inlet Body 136.6969.9211 136.7069.9211 136.7169.9211 136.7549.9211 136.7649.9211 136.7849.9211 136.8049.9211 136.8149.9211 136.8349.9211 136.3649.9211 136.8649.9211
Bellows and Bellows Conversion Kits – Material 316L (Item 15)
Note:
Valve Size
Set pressure
Bellows
Conversion Kit
all1
p ≤ 580 psig (40 bar)
400.7949.0000
5021.1050
all1
p > 580 psig (40 bar)
400.6349.0000
5021.1051
1
The bellows for type 459 / 462 is back pressure compensating for orifice size 0.206 In2 (133 mm2).
Gaskets Body – Bonnet (Item 60) Valve Size
Gasket
Material
all
500.2407.0000
Graphite + 316 SS
all
500.2405.0000
Gylon (filled PTFE)
LWN 471.55
57
Series 459
Threaded Safety Relief Valves Spring Loaded Approvals Series 459
Approvals Series 459 Coefficient of Discharge1 Country
Code
Type
Fluid
Approval No.
Orifice
ASME Certified K
ASME Measured KD
United States
ASME Sec. VIII
459 / 462
S/G L
37112 37101
All All
0.811 0.566
0.901 0.629
Canada
CRN
459 / 462
S/G/L
OG0730.9C
All
Refer to ASME-code
Country
Code
Type
Fluid
Approval No.
Orifice
Certified Coefficient of Discharge K dr
S/G L
Europe
PED 97/23/EC (CE-marking)
459 / 462
S/G L S/G L
0.044
072020111 Z0008/0/13
S/G L
0.099 0.206 0.373
0.81 0.70 0.83 0.61 0.81 0.53 2 0.79 0.52 αw
S/G L
Others
Note:
58
AD 2000Merkblatt A2
China: Russia: Ship classification authorities:
459 / 462
S/G L S/G L
0.044 0.099 TUEV-SV 909
S/G L SELO / AQSIQ (SQLBPV) DIN GOST
0.206 0.373
0.81 0.70 0.83 0.61 0.81 0.53 2 0.79 0.52
BV, DNV, GL, LROS, RINA
Acc. to ASME Sec. VIII the certified coefficient of discharge K is calculated by K = 0.9 * KD For sizing acc. to ASME Sec. VIII K must be used in the sizing equations. 2 Type 462: K dr = 0.61 / α w = 0.61 1
LWN 471.56
Threaded Safety Relief Valves Spring Loaded Capacities US Units / Metric Units · STEAM
Type 459 / 462 STEAM
STEAM
ASME Section VIII [lb/ hr]
ASME Section VIII [kg / hr]
Capacities US Units
Capacities Metric Units Orifice [Inch2 ]
Set pressure [psig] 15 20 30 40 50 60 70 80 90 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 2000 2500
Orifice [mm2 ]
0.044
0.099
0.206
0.373
349 389 430 470 510 550 591 631 671 711 752 792 832 1034 1235 1436 1638 1839 2040 2242 2443 2644 2842 3062 4233 5602
155 196 242 287 332 377 423 468 513 604 695 785 876 966 1057 1148 1238 1329 1419 1510 1601 1691 1782 1872 2326 2779 3232 3685 4138 4591 5044 5497 5950 6394 6889 9525 12604
281 324 410 504 599 693 788 882 977 1071 1260 1449 1638 1827 2016 2205 2394 2584 2773 2962 3151 3340 3529 3718 3907 4852 5797 6742 7688 8633 9578 10523 11469 12414 13340 14373 19872 26298
509 586 742 913 1085 1256 1427 1599 1770 1941 2284 2626 2969 3311 3654 3996 4339 4682 5024 5367 5709 6052 6394 6737 7080 8792 10505 12218 13931 15644 17357 19070 20782 22495 24174
Set pressure [bar] 1 2 3 4 5 6 7 8 9 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200
28.2
63.3
133
241
145 171 198 224 251 277 304 330 357 383 410 436 463 489 516 542 675 807 940 1072 1205 1340 1487 1638 1794 1956 2126 2305 2496 2701 2926 3176
87 117 147 176 206 236 266 296 326 385 445 505 564 624 683 743 803 862 922 982 1041 1101 1161 1220 1518 1817 2115 2413 2711 3015 3345 3685 4036 4401 4783 5186 5615 6077 6583 7146
125 182 244 306 368 430 493 555 617 679 804 928 1053 1177 1301 1426 1550 1675 1799 1924 2048 2173 2297 2421 2546 3168 3790 4412 5035 5657 6290 6978 7687 8421 9183 9980 10821 11716 12680 13734 14909
227 330 442 555 667 780 893 1005 1118 1231 1456 1682 1907 2133 2358 2584 2809 3035 3260 3486 3711 3937 4162 4388 4613 5741 6868 7996 9123 10251 11398
Capacities for saturated steam according to ASME Section VIII (UV), based on set pressure plus 10 % overpressure. Capacities at 30 psig (2.07 bar) and bellow are based on 3 psig (0.207 bar) overpressure.
LWN 471.57
59
Series 459
Threaded Safety Relief Valves Spring Loaded Capacities US Units / Metric Units · AIR
Type 459 / 462 AIR
AIR
ASME Section VIII [S.C.F.M.]
ASME Section VIII [Sm3/ hr]
Capacities US Units
Capacities Metric Units Orifice [Inch2 ]
Set pressure [psig] 15 20 30 40 50 60 70 80 90 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 2000 2500 3000 3500 4000 4500 5000 6000 7000 8000 9000 10000 11000
0.044
125 139 154 168 182 197 211 226 240 254 269 283 298 370 442 514 586 658 730 802 874 946 1018 1090 1450 1810 2170 2530 2890 3250 3610 4330 5050 5770 6490 7211 7931
0.099
55 70 86 103 119 135 151 167 184 216 248 281 313 346 378 410 443 475 508 540 572 605 637 670 832 994 1156 1318 1480 1642 1804 1966 2128 2290 2452 3262 4072 4882 5692 6502 7313 8123
Orifice [mm2 ] 0.206
0.373
100 115 146 180 213 247 281 315 348 382 449 517 584 652 719 787 854 921 989 1056 1124 1191 1259 1326 1393 1731 2068 2405 2742 3079 3416 3753 4091 4428 4765 5102 6788 8473
181 209 264 326 387 448 509 570 631 692 814 936 1058 1180 1302 1424 1546 1669 1791 1913 2035 2157 2279 2401 2523 3134 3744 4354 4965 5575 6186 6796 7407 8017 8628
Set pressure [bar] 1 2 3 4 5 6 7 8 9 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 250 300 350 400 500 600 700 800
28.2
194 229 265 300 336 371 407 442 478 513 549 585 620 656 691 727 904 1082 1259 1437 1614 1792 1969 2147 2325 2502 2680 2857 3035 3212 3390 3568 4455 5343 6231 7119 8894 10670 12446 14221
63.3
117 157 196 236 276 316 356 396 436 516 596 676 756 836 916 996 1075 1155 1235 1315 1395 1475 1555 1635 2034 2434 2833 3233 3632 4032 4431 4831 5230 5630 6029 6429 6828 7228 7627 8027 10024 12022 14020 16017
133
241
168 243 326 409 492 575 658 741 825 908 1074 1240 1406 1573 1739 1905 2071 2238 2404 2570 2737 2903 3069 3235 3402 4233 5064 5895 6727 7558 8389 9221 10052 10883 11715 12546 13377 14209 15040 15871 16702
303 440 590 740 891 1041 1192 1342 1493 1643 1944 2246 2547 2848 3149 3450 3751 4052 4353 4654 4955 5256 5557 5858 6159 7664 9170 10675 12180 13685 15190
Capacities for air according to ASME Section VIII (UV), based on set pressure plus 10 % overpressure at 60 °F (16 °C). Capacities at 30 psig (2.07 bar) and below are based on 3 psig (0.207 bar) overpressure. 60
LWN 471.58
Threaded Safety Relief Valves Spring Loaded Capacities US Units / Metric Units · WATER
Type 459 / 462 WATER
WATER
ASME Section VIII [US - G.P.M.]
ASME Section VIII [103 kg/ hr]
Capacities US Units
Capacities Metric Units Orifice [Inch2 ]
Set pressure [psig] 15 20 30 40 50 60 70 80 90 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 2000 2500 3000 3500 4000 4500 5000 6000 7000 8000 9000 10000 11000
0.044
12.5 13.3 14.0 14.7 15.4 16.0 16.6 17.2 17.7 18.3 18.8 19.3 19.8 22.2 24.3 26.2 28.0 29.7 31.3 32.9 34.3 35.7 37.1 38.4 44.3 49.6 54.3 58.6 62.7 66.5 70.1 76.8 82.9 88.6 94.0 99.1 104
0.099
10.2 12.2 14.1 15.8 17.3 18.7 19.9 21.2 22.3 24.4 26.4 28.2 29.9 31.5 33.1 34.5 36.0 37.3 38.6 39.9 41.1 42.3 43.5 44.6 49.9 54.6 59.0 63.1 66.9 70.5 74.0 77.2 80.4 83.4 86.4 99.7 111 122 132 141 150 158
Orifice [mm2 ] 0.206
0.373
18.8 21.2 25.4 29.3 32.8 35.9 38.8 41.5 44.0 46.4 50.8 54.9 58.7 62.3 65.6 68.8 71.9 74.8 77.6 80.4 83.0 85.6 88.0 90.5 92.8 104 114 123 131 139 147 154 161 167 174 180 208 232
34.0 38.4 46.0 53.1 59.4 65.1 70.3 75.1 79.7 84.0 92.0 99.4 106 113 119 125 130 135 141 146 150 155 159 164 168 188 206 222 238 252 266 279 291 303 314
Set pressure [bar] 1 2 3 4 5 6 7 8 9 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 250 300 350 400 500 600 700 800
28.2
2.71 2.97 3.21 3.43 3.64 3.83 4.02 4.20 4.37 4.53 4.69 4.85 5.00 5.14 5.28 5.42 6.06 6.64 7.17 7.67 8.13 8.57 8.99 9.39 9.77 10.1 10.5 10.8 11.2 11.5 11.8 12.1 13.6 14.8 16.0 17.1 19.2 21.0 22.7 24.2
63.3
2.73 3.34 3.86 4.31 4.72 5.1 5.45 5.78 6.1 6.68 7.22 7.71 8.18 8.62 9.04 9.45 9.83 10.2 10.6 10.9 11.2 11.6 11.9 12.2 13.6 14.9 16.1 17.2 18.3 19.3 20.2 21.1 22.0 22.8 23.6 24.4 25.1 25.9 26.6 27.3 30.5 33.4 36.1 38.6
133
241
4.20 5.68 6.95 8.02 8.97 9.83 10.6 11.3 12.0 12.7 13.9 15.0 16.0 17.0 17.9 18.8 19.7 20.5 21.2 22.0 22.7 23.4 24.1 24.7 25.4 28.4 31.1 33.6 35.9 38.1 40.1 42.1 44.0 45.7 47.5 49.1 50.8 52.3 53.8 55.3 56.7
7.61 10.3 12.6 14.5 16.2 17.8 19.2 20.5 21.8 23.0 25.2 27.2 29.1 30.8 32.5 34.1 35.6 37.0 38.4 39.8 41.1 42.4 43.6 44.8 45.9 51.4 56.3 60.8 65.0 68.9 72.7
Capacities for water according to ASME Section VIII (UV), based on set pressure plus 10 % overpressure at 68 °F (20 °C). Capacities at 30 psig (2.07 bar) and below are based on 3 psig (0.207 bar) overpressure. LWN 471.59
61
Series 459
Threaded Safety Relief Valves Spring Loaded Specification Sheet
636 326 9185
Please fax to: or your local representative
Specification Sheet
Company:
Phone:
Location:
Fax:
Name:
e-mail:
Reference:
Date:
GENERAL 1 ■ Item No.: 2 ■ Tag No.: 3 ■ Customer: 4 ● Equipment: 5 ● Enquiry/Order No.: 6 ● Delivery time: 7 ● Number of valves: 8 ● Number of spare valves:
9 ■ Basis of Selection: Code: ■ PED 97/ 23 / EC (CE-marking) ■ Two phase flow ■ other: 10 ■ Documentation: Material test report ■ inlet body ■ outlet body ■ bonnet: ■ other:
SERVICE CONDITIONS 11 ■ Fluid and state: ■ Steam (S) 12 ■ Molecular weight: 13 ● Coefficient C: 14 ● Ratio of specific heats k: 15 ● Compressibility factor Z: 16 ■ Spec. gravity / units: 17 ● Viscosity / units: 18 ■ Relieving temperature / units: 19 ■ Required capacity / units: VALVE CONSTRUCTION 27 ● Orifice Designation: 28 ● Connection inlet 29 ● Size: 30 ● Thread type or Flange class: 31 ● Facing type: ■ RF ■ RJ
20 21 22 23 24 25 26
Gas (G) ■ Liquid (L) Set pressure / units: Operating pressure / units: Cold diff. set pressure / units: Const. back pressure / units: Var. back pressure / units: Overpressure: ■ 10 % Blowdown: ■ 10 %
■ 3: SG Iron 38 ● Soft seat ■ CR ■ NBR seal: ■ FPM ■ FFKM 39 ● Bellows: ■ 316L ■ Inconel® 40 ● Spring: ■ high temp. alloy ■ stainless steel 41 ● Comply with NACE MR 0175
ACCESSORIES AND OPTIONS 42 ■ Lifting lever: ■ plain H3 ■ packed H4 ■ cap H2 43 ● Test gag: ■ yes ■ no
44 ● Bellows: ■ yes 45 ● Others (specify):
SIZING AND SELECTION 46 ▲ Required orifice area / units: 47 ▲ Selected orifice area / units: 48 ▲ Coeff. of discharge: 49 ▲ Calculated capacity / units: Order Code
of
■ ASME VIII ■ Fire
■ Two phase
■ ...... % ■ 20 % ■ ...... %
■ other:
■ 4: Stainless steel ■ EPDM ■ other: ■ Hastelloy® ■ other: steel ■ carbon steel ■ other: ■ Yes ■ No ■ no
■ Please fill in these fields in any case. ● Please fill in these fields if possible. ▲ These fields will be completed by the supplier.
. Article No.
62
■ ■ ● ● ■ ■ ● ●
Connection outlet Size: Thread type or Flange class: Facing type: ■ RF ■ RJ
■ other:
MATERIALS 32 ● LESER Material Code ■ 2: Carbon Steel 33 ● LESER Type ■ 459 ■ 462 34 ■ Inlet Body: 35 ● Outlet Body: 36 ● Bonnet: 37 ● Disc (metal): ■ SS hardened ■ 316L ■ other:
4
Page:
Set Pressure
Connections
Options
Documentation
Code and Medium LWN 471.60
First in safety … … a not so brief history of LESER History
Safe solutions from the specialist
Where to find LESER
The company started in 1818 as a brass foundry and over the decades developed a product portfolio of components for mechanical equipment and machines during the “industrial revolution”. At first LESER specialized on tough applications and its level gauges for steam boilers were famous. Soon, the company delivered their first safety valve and as a consequence of quick growing industrialization and improving demand for safety, LESER rapidly became the specialist for safety valves.
Today, LESER´s product range includes 23 different designs with a variety of materials and sizes from 1/2” to 16”, providing safe solutions for almost every application with ● Full lift safety valves ● High-pressure safety valves ● Safety valves according to API 526 ● Relief and safety relief valves ● Clean service safety relief valves ● Safety valves for critical service conditions ● Safety valves according to special standards and regulation ● Safety valves with supplementary pneumatic load ● Special versions
Headquartered in , with a state-of-the-art factory and more than 290 employees, LESER is present through subsidiaries and qualified partners in over 40 countries, providing products and services worldwide.
Type 441
For the nearest source please us at:
LESER LLC 1664 Headland Drive Fenton, MO 63026 Phone: 636 - 343 - 8766 Fax: 636 - 326 - 9185 e-mail: [email protected] www.leserusa.com
Type 459
Type 437
Type 526
LESER’s factory today
Type 488
LESER Headquarter 1818 – 1914
Compact Performance Catalog Edition July 2005 LWN 471.01-471.60 / 07.2005 / 3000
The Safety Valve LESER LLC
1664 Headland Drive Fenton, MO 63026
Phone: 636 - 343 - 8766 636 - 326 - 9185 Fax:
e-mail: [email protected] www.leserusa.com
CATALOG The Safety Valve
Series 459 Packed lever H4
Series 459 Balanced bellows design
Frontview 462 H4 GG 4c
Frontview 462 H2 GG SB 4c
Series 459 Cap H2
Series 459 Flanged version
Frontview 462 H2 GG 4c
Series 459 Plain lever H3 Frontview 462 H3 GG 4c
Threaded Safety Relief Valves Spring Loaded Contents
Contents
General Applications
5
Features and Benefits
5
Codes and Standards
5
Overview
6
Series 459
33
Materials
10
Materials
34
How to Order • Numbering System • Article Numbers • Available Connections
12 14 15
How to Order • Numbering System • Article Numbers • Available Connections
40 42 43
Dimensions and Weights
16
Dimensions and Weights
44
Pressure Temperature Ratings
18
Pressure Temperature Ratings
46
Accessories and Options • Caps and Levers • Metal Seat • Soft Seal • Heating Jacket
20 21 22 24
Spare Parts
25
Approvals Series 437
27
Accessories and Options • Caps and Levers • Balanced Bellows • Metal Seat • Soft Seal • Heating Jacket • Lift Indicator
48 50 51 52 54 55
Capacities Type 437
28
Spare Parts
56
Capacities Type 438 / 439
30
Approvals Series 459
58
Specification Sheet
32
Capacities Series 459
59
Specification Sheet
62
Series 437
9
Series 437 Cap H2
Series 437 Packed lifting device H4 LWN 471.01
Series 437 Flanged version
3
Threaded Safety Relief Valves Spring Loaded General
LESER´ s compact performance valves are spring loaded
LESER´ s compact performance valves are designed and
safety relief valves of specially com-
manufactured to highest standards and
pact design, developed in close coop-
compliant with and approved accord-
eration with plant engineers and ser-
ing to ASME (Sec. VIII, Div. 1), the
vice specialists to protect special
Canadian CRN, the European PED
processes and installations against
standard (CE), the German AD 2000-
overpressure.
Merkblatt A2 and those of many other
Extensive testing at the LESER ASME-
countries, covering requirements from
certified test lab together with up to
end-s, OEM´ s and engineering
date manufacturing processes ensure
companies worldwide.
the reliability of these state of the art products.
Type 437 / 438 / 439
Type 459 / 462
4
LWN 471.02
Threaded Safety Relief Valves Spring Loaded Applications · Features and Benefits · Codes and Standards
Applications
Features and Benefits
Codes and Standards
LESER´ s compact performance valves represent the ultimate solution for critical applications such as
LESER´ s compact performance valves cover a large variety of types, materials and options to fit any application: Scope of Design ● Four valve sizes from 1/2” through 11/2” ● Four orifice sizes from 0.3*D through F ● Threaded or flanged connections ANSI or DIN, Inlet rating: class 150# to 2500# ● Standard metal sealing: Type 437 and Type 459 or ● Soft seal: Type 438, 439 and 462 ● Optional stainless steel bellows for back pressure compensation ● Packed or plain lifting lever or gastight cap ● Heating jacket available for high viscosity fluids
LESER´ s compact performance valves comply with the following codes and standards:
● ● ● ● ● ● ●
Air/gas compressors and pumps Technical gases and CO2 plants Chemical equipment and piping Pressure vessels and piping systems containing gas, air, liquid or steam LPG/LNG terminals, carriers etc. Cryogenic systems and oxygen application Thermal relief
●
● ● ● ● ● ●
●
ASME Section VIII – National Board certified capacities (single trim for steam, gas and liquid service): UVstamp ASME Section II - materials ASME B 16.34 and ASME B16.5 API 527, NACE MR 0175 CRN EN ISO 4126-1 PED 97 / 23 / EC (CE-marking), VdTUEV-SV 100, AD 2000-Merkblatt A2 Others
Compact design and High Performance ● Single trim for steam, gas and liquid for less spare parts and easier maintenance ● Broad set pressure range up to 11600 psig ● Self-draining body design, avoids residues and reduces corrosion ● One-piece spindle reduces friction ● Unobstructed seat bore for maximum capacity compared to nominal size ● Heavy duty design Type 459M ● Various materials: chrome steel, stainless steel, Monel®‚ or Hastelloy® ● All parts machined from bar stock for complete valves from special materials within short time ● Variety of capacities and versions, multiple choice of connections to fit any application Ease of plant design, installation, operation and maintenance ● Replaceable nozzle and disc ● Hardened or optional stellited metal sealing for longer product life ● Soft seat for superior tightness ● Ringless design, no adjustments
LWN 471.03
5
Threaded Safety Relief Valves Spring Loaded General · Overview
Overview
Series 437 ● ● ●
Series 459
Type 437: Metal to metal seat Type 438: Soft seal, o-ring Type 439: Soft seal, vulcanized
Common Features ● Very compact design ● Medium capacity ● Two standard body materials: chrome steel, stainless steel ● All parts machined from bar stock – various material options available ● Various connections
● ●
Type 459: Metal to metal seat Type 462: Soft seal, o-ring
Common Features ● Compact design ● High capacity compared to nominal sizes: for most common valve size 3/4” x 1” up to 1.5 D-orifice capacity * ● Four different orifice sizes available ● Wide range of set pressures ● Optional balanced bellows ● Three body materials: cast iron, carbon steel, stainless steel ● Various connections
The diagram gives a quick overview about the main features of LESER’s compact performance valves: capacity and tightness.
Tightness
Series 437
Series 459
Type 439 Vulcanized soft seal Type 438 O-ring disc Type 437 Sealing plate
Type 462 O-ring disc Type 459 Sealing plate
Type 437 Metal to metal
Type 459 Metal to metal
Capacity / Orifice
Selection of Threaded Safety Relief Valves Criteria
Series Type
Set Pressure
> 2700psig > 6000psig
High Flow Capacity is required
≥ D Orifice ≥ F Orifice
Thermal Expansion application Soft Seats Metal Seats Temperature > 536 °F Temperature < -50 °F Variable Back Pressure occurs Threaded Connections are required Flanged Connections are required Note: 6
1
437 437 – – – – ✓ –1 ✓ – ✓ – ✓ ✓
Flanged SRV
459
438 – – – – ✓ ✓
439 – – – – ✓ ✓
– – – – ✓ ✓
– – – – ✓ ✓
459 ✓ ✓ ✓
462 ✓
e.g. 526 ✓
– ✓
– – –1 ✓ ✓ ✓ ✓ ✓ ✓
– – ✓
– ✓ ✓
– – – ✓ ✓ ✓
– ✓ ✓ ✓ ✓ ✓ – ✓
Disc with sealing plate (e.g. PTFE) is available. LWN 471.04
Threaded Safety Relief Valves Spring Loaded General · Overview
Metal to metal seat
Type 437 and 459 provide for the protection of installations where the metal to metal seat with its wide temperature range and good chemical resistance is suitable.
Set Pressure [psig]
Type 437 and 459 can be equipped with an optional sealing plate disc for low temperature soft seat applications. 459 0.044 inch2 459 0.099 inch2
437 Long Version 0.122 inch2 437 Standard Version 0.122 inch2
459 0.206 inch2 459 0.373 inch2
Capacity / Orifice
Metal to metal seat
Type 437 Capacity Set pressure Sealing Design
LWN 471.05
Orifice 0.5*D up to 2610 psig metal to metal very compact
Type 459 Capacity Set pressure Sealing Design
Orifice 0.3*D through F up to 11600 psig metal to metal compact, optional bellows, heavy duty design 459M
Schnitt 459 H2 male 4c
7
Threaded Safety Relief Valves Spring Loaded General · Overview
Soft seal
Type 438, 439 and 462 provide for the protection of installations where a soft seat for superior tightness is required like for hard to hold gases.
Set Pressure [psig]
Type 439 allows maintained tightness close to the set pressure especially at lower set pressures due to the advanced design of the vulcanized soft seat.
462 0.099 inch2
438 Long Version 0.122 inch2 438 Standard Version 0.122 inch2
462 0.206 inch2 462 0.373 inch2
439 0.122 inch2
Capacity/ Orifice
Soft seal
Type 438 Capacity Set pressure Sealing Design
8
Orifice 0.5*D up to 2610 psig soft seal, O-ring very compact
Type 439 Capacity Set pressure Sealing Design
Orifice 0.5*D up to 232 psig vulcanized soft seal very compact
Type 462 Capacity
Schnitt 439 H2 3 4x1 male 4c
Set pressure Sealing Design
Orifice 0.75*D through F up to 5075 psig soft seal, O-ring compact, optional bellows
Schnitt 462 H2 male 4c
LWN 471.06
Threaded Safety Relief Valves Spring Loaded Series 437
Series 437
Type 437 / 438 / 439
Type 437 / 438 / 439 Flanged Version LWN 471.07
9
Series 437
Threaded Safety Relief Valves Spring Loaded Materials Type 437
Materials Type 437 Item
Part Name
40
Type 4373 Chrome Steel
Type 4374 Stainless Steel SA 479 316L SA 479 316L
1 2
Inlet body Outlet body
SA 479 316L SA 479 430
7
Disc
12 16 / 17
Spindle Spring plate
Hardened stainless steel AISI 420 AISI 430F
18 19 40 54 57
Adjusting screw with bushing Lock nut Cap H2 Spring Pin
AISI 430F PTFE Steel Steel Stainless steel Stainless steel
316L PTFE 316L 316L Stainless steel Stainless steel
61
Ball
Hardened stainless steel
316
18 19 16 12
316L
54
316L 316L
2 17 57 61 7 1
Flanged Version 1 2 2.1 2.2 48
Inlet body Outlet body Outlet adaptor Outlet flange Inlet flange
SA 479 316L SA 479 430 316L 316L 316L
SA 479 316L SA 479 316L 316L 316L 316L
Type 437
40 18 19 16 2.2
2.1
12 54 2 17 57 61 7 1 48
Type 437 Flanged version 10
LWN 471.08
Threaded Safety Relief Valves Spring Loaded Materials Type 438 · Type 439
Materials Type 438 · Type 439
40
Item
Part Name
Type 4383 Type 4393 Chrome Steel
Type 4384 Type 4394 Stainless Steel
1 2
Inlet body Outlet body
SA 479 316L SA 479 430
SA 479 316L SA 479 316L
19
7
Disc with soft seal 1 Spindle Spring plate
316L
316L
16
AISI 420 AISI 430F
316L 316L
12
18
Adjusting screw with bushing
AISI 430F PTFE
316L PTFE
54
19 40 54 57
Lock nut Cap H2 Spring Pin
Steel Steel Stainless steel Stainless steel
316L 316L Stainless steel Stainless steel
61
Ball
Hardened stainless steel
316
12 16 / 172
18
2
7
1
Flanged Version 1 2 2.1 2.2 48 Notes:
Inlet body Outlet body Outlet adaptor Outlet flange Inlet flange CR NBR EPDM FPM FFKM
1
2
– – – – – –
SA 479 316L SA 479 430 316L 316L 316L
SA 479 316L SA 479 316L 316L 316L 316L
Type 438 O-ring seal
Neoprene Nitrile Ethylene / Propylene Fluorocarbon Kalrez® (Type 438) ISOLAST® (Type 439)
Schnitt 438 H2 3 4x1 male 4c
40
18
Item 17 only Type 439
16 2.2
2.1 12
54
2 2
17 7
57 1
61 48
7
1
Type 439 Vulcanized soft seal
Type 438 Flanged version
LWN 471.09
11 Schnitt 438 H2 Flansch
Series 437
Threaded Safety Relief Valves Spring Loaded How to Order – Numbering System
How to Order Numbering System
1
Article Number 1
2
3
Set Pressure
Please state unit (in gauge)!
4
Please do not exceed pressure range mentioned in the spring charts.
437 4 . 314 2 1
2
3
Connections
Please refer to table “Available Connections” on page 15. Please state one option code for each, inlet and outlet.
Type 437 / 438 / 439 Type
Types of sealing 437 Metal seat Metal-to-metal Metal-to-metal stellited Soft seat EPDM NBR CR FFKM (Kalrez®) FKM (Viton®) Plastic seat SP PCTFE PTDE-FDA
12
Vespel-SP1 Kel-F Teflon
438
439
✓ ✓ ✓ ✓ ✓
✓ ✓ ✓ ✓ ✓
✓ ✓
✓ ✓ ✓
2
Material Code 3 – Body Material Chrome Steel 4 – Body Material Stainless Steel
3
Valve Code Identifies valve size, body material and orifice, refer to page 14.
4
Code for lifting device 2 – Screwed cap H2 4 – Packed lever H4
4374.3142
100 psig
Article No.
Set Pressure
V62
V71 Connections
LWN 471.10
Threaded Safety Relief Valves Spring Loaded How to Order – Numbering System
4
Options
Type 437 / 438 / 439
Option Code
• Inlet body stellited (Type 437 only) • Soft seal material (Type 438 / 439 only) NBR EPDM CR FKM FFKM • Heating jacket
L20
“N” “F” “K” “L” “C”
J30 J22 J21 J23 J20
Documentation
6
Code and Medium
Please select requested documentation:
1
Material test certificate DIN EN 10204-3.1 Parts Inlet body Outlet body Bonnet Cap / lever cover Disc
Option Code H 01 L 34 L 30 L 31 L 23
H29
H01 Options
LWN 471.11
L20
5
2
1 . 1 1
Code 1. ASME Section VIII 2. CE / VdTUEV 3. ASME Section VIII + CE / VdTUEV
2
Medium .1 Gases .2 Liquids .3 Steam .0 Steam / Gases / Liquids (valid only for CE / VdTUEV)
L30
1.1
Documentation
Code and Medium
13
Series 437
Threaded Safety Relief Valves Spring Loaded How to order · Article Numbers
How to order
Article Numbers Type 437 Type
Orifice [Inch2 ]
Type 437 standard version
Body Material Chrome Steel SA 479 430
Body Material Stainless Steel SA 479 316L
Set Pressure Range [psig]
Cap H2
Packed Lever H4
Set Pressure Range [psig]
Cap H2
Packed Lever H4
1.5 - 1348
4373.2602
4373.2604
1.5 - 986
4374.3142
4374.3144
1349 - 2610
4373.2612
4373.2614
987 - 2610
4374.3152
4374.3154
0.122 Type 437 long version 1
Article Numbers Type 438 Type
Orifice [Inch2 ]
Body Material Chrome Steel SA479 430
Body Material Stainless Steel SA 479 316L
Set Pressure Range [psig]
Cap H2
Packed Lever H4
Set Pressure Range [psig]
Cap H2
Packed Lever H4
7 - 1348
4383.2862
4383.2864
7 - 986
4384.2982
4384.2984
1349 - 2610
4383.2872
4383.2874
987 - 2610
4384.2992
4384.2994
Type 438 standard version 0.122 Type 438 long version1
Article Numbers Type 439 Type
Orifice [Inch2 ]
Type 439 standard version
0.122
Note:
14
1
Body Material Chrome Steel SA479 430
Body Material Stainless Steel SA 479 316L
Set Pressure Range [psig]
Cap H2
Packed Lever H4
Set Pressure Range [psig]
Cap H2
Packed Lever H4
1.5 - 232
4393.2882
4393.2884
1.5 - 232
4394.2892
4394.2894
The “long version” is a high pressure version with extended outlet body.
LWN 471.12
Threaded Safety Relief Valves Spring Loaded How to Order · Available Connections
Available Connections – Threaded ASME ANSI B1.20.1 Inlet
Size
Male NPT Option Code
Outlet Female NPT Option Code Size
Female NPT Size Option Code
1
V61
1
V58
1
V70
3
/4”
V62
3
/4”
V59
3
/4”
V77
1”
V63
1”
V60
1”
V71
/2”
/2”
/2”
Male thread
Available Connections – Flanged ASME ANSI B16.5 Inlet Size
1
/2”
3
/4”
1”
Notes:
1 2
Outlet
ANSI-Class
Option Code
150
Size
ANSI-Class
Option Code
V01
150
V24
300 600
V02
300 600
V13
900 1500
V03
900
V14
2500 150
V04 V05
– 150
– V15
300 600
V06
300 600
V16
900 1500
V07
900
V17
2500 150
V08 V09
– 150
– V18
300 600
V10
300 600 1
V19
900 1500
V11
900 2
V20
2500
V12
–
–
1
/2”
3
/4”
1”
Female thread
Maximum inlet flange class: #1500 Extended center to face dimension outlet: 4 3/4” (120 mm)
Different sizes and flange classes inlet and outlet can be combined. Standard flange facing is raised face (RF) according to ASME ANSI B16.5. RJ flange facing as well as other facings are available. Flanged version LWN 471.13
15
Series 437
Threaded Safety Relief Valves Spring Loaded Dimensions and Weights Threaded / Flanged Connections US Units
a
s s b
Male thread
Female thread
Flanged version
Dimensions and Weights Threaded Connections US Units Center to Face [Inch] Connection Size [Inch]
Orifice [Inch2 ] Male
1
1
/2” x /2” 1 ”x 3 ” /2 /4 3 ”x 3 ” /4 /4 3 ” x 1” /4
0.122
1” x 1” Note:
1
1 1 1 1 1
19
/64 19 /64 19 /64 25 /64 23 /64
c 55
Standard
Long Version
Female a
b
3
3
Hmax. 8 35/64 8 35/64 8 35/64 8 21/32 8 13/16
Hmax.1 9 3/8 9 3/8 9 3/8 9 31/64 9 41/64
1 /4 1 3/4 1 3/4 1 53/64 1 53/64
/64 55 /64 55 /64 55 /64 1 1/8
Weight [lbs]
Outlet
Inlet
a
Height [Inch]
1 1 1 1 1
/16 7 /16 7 /16 7 /16 7 /16
m
3.5
only Type 437 / 438
Dimensions and Weights Flanged Connections US Units Center to Face [Inch] Connection Size [Inch]
Orifice [Inch2 ]
Class 150 inlet a
outlet b
1
/2” 3 ” /4 1 2
16
only Type 437 / 438 for 1/2” ANSI 150: 3
s 11
0.122
1” Notes:
Flange Thickness [Inch]
4
31
/642 3 15/16
/16 11 /16 3 /4
Height [Inch]
Weight [lbs]
Class 300 / 600 s
Class 900/ 1500 s
Class 2500
Standard
Long Version
s
Hmax.
Hmax.1
m
1 1
1 5/16 1 1/4 1 9/16
1 7/16 1 9/16 1 5/8
10 7/16
17
15.5
1
1 /8
11
/64
15/16
LWN 471.14
Threaded Safety Relief Valves Spring Loaded Dimensions and Weights Threaded / Flanged Connections Metric Units
Dimensions and Weights Threaded Connections Metric Units Center to Face [mm] Connection Size [Inch]
Orifice [mm2 ]
Inlet Male
1
1
/2” x /2” 1 /2” x 3/4” 3 ”x 3 ” /4 /4 3 ” x 1” /4
78.5
1” x 1” Note:
1
Height [mm]
Weight [kg]
Outlet
Standard
Long Version
a
c
Female a
b
Hmax.
Hmax.1
m
33 33 33 36 35
22 22 22 22 27
44.5 44.5 44.5 46.5 46.5
30 37 37 37 37
195 195 195 198 197
216 216 216 219 218
1.6
only Type 437 / 438
Dimensions and Weights Flanged Connections Metric Units Center to Face [mm] Connection Size [Inch]
Orifice [mm2 ]
Class 150 inlet a
outlet b
1032
100
1
/2” /4”
3
78.5
1” Notes:
1 2
Flange Thickness [mm]
Height [mm]
Weight [kg]
Class 900 / 1500 s
Class 2500
Standard
Long Version
s
Class 300 / 600 s
s
Hmax.
Hmax.1
m
17 17 19
25 25 28
33 32 39
37 39 42
265
286
7
only Type 437 / 438 for 1/2” ANSI 150: 100 mm
LWN 471.15
17
Series 437
Threaded Safety Relief Valves Spring Loaded Pressure Temperature Ratings Type 437 / 438 / 439 US Units
Pressure Temperature Ratings Type 437 – US Units1 Valve Size
Orifice [Inch2 ]
Set Pressure Range [psig] Body Material
Standard Version
Long Version
Temperature Range according to ASME [°F]
min.
max.
min.
max.
min.
max.
/2” – 1”
0.122
Chrome Steel
1.5
1348
1349
2610
- 20
+ 428
/2” – 1”
0.122
Stainless Steel
1.5
986
987
2610
- 450
+ 536
1
1
Pressure Temperature Ratings Type 438 – US Units1 Valve Size
Orifice [Inch2 ]
Set Pressure Range [psig] Body Material
Standard Version
Long Version
Temperature Range according to ASME [°F ]2
min.
max.
min.
max.
min.
max.
/2” – 1”
0.122
Chrome Steel
15
1348
1349
2610
- 20
+ 356
/2” – 1”
0.122
Stainless Steel
15
986
987
2610
- 49
+ 356
1
1
Pressure Temperature Ratings Type 439 – US Units1 Valve Size
2
18
Standard Version min.
max.
min.
max.
0.122
Chrome Steel
1.5
232
- 20
+ 356
/2” – 1”
0.122
Stainless Steel
1.5
232
- 49
+ 356
1
1
Body Material
Temperature Range according to ASME [°F ]2
/2” – 1”
1
Notes:
Orifice [Inch2 ]
Set Pressure Range [psig]
For flanged versions the pressure temperature rating acc. to ANSI B 16.34 may supersede these limits The temperature is limited by the soft seal material, please refer to soft seal selection table on page 23.
LWN 471.16
Threaded Safety Relief Valves Spring Loaded Pressure Temperature Ratings Type 437 / 438 / 439 Metric Units
Pressure Temperature Ratings Type 437 – Metric Units1 Valve Size
Orifice [mm 2 ]
Set Pressure Range [bar] Body Material
Standard Version
Long Version
Temperature Range according to ASME [°C]
min.
max.
min.
max.
min.
max.
/2” – 1”
78.5
Chrome Steel
0.1
93
93
180
- 29
+ 220
/2” – 1”
78.5
Stainless Steel
0.1
68
68
180
- 268
+ 280
1
1
Pressure Temperature Ratings Type 438 – Metric Units1 Valve Size
Orifice [mm 2 ]
Set Pressure Range [bar] Body Material
Standard Version
Long Version
Temperature Range according to ASME [°C]2
min.
max.
min.
max.
min.
max.
/2” – 1”
78.5
Chrome Steel
1
93
93
180
- 29
+ 180
/2” – 1”
78.5
Stainless Steel
1
68
68
180
- 45
+ 180
1
1
Pressure Temperature Ratings Type 439 – Metric Units1 Valve Size
2
Standard Version min.
max.
min.
max.
78.5
Chrome Steel
0.1
16
- 29
+ 180
/2” – 1”
78.5
Stainless Steel
0.1
16
- 45
+ 180
1
1
Body Material
Temperature Range according to ASME [°C]2
/2” – 1”
1
Notes:
Orifice [mm 2 ]
Set Pressure Range [bar]
For flanged versions the pressure temperature rating acc. to ANSI B 16.34 may supersede these limits. The temperature is limited by the soft seal material, please refer to soft seal selection table on page 23.
LWN 471.17
19
Series 437
Threaded Safety Relief Valves Spring Loaded Accessories and Options · Caps and Levers
Accessories and Options Caps and Levers Series 437 is available with the following lever designs ● ●
Materials – subassembly Item 40 Body Material Chrome Steel
Cap H2 Packed lever H4, threaded design
The packed lever H4 provides some special features: ● operation by turning the knob anticlock wise ● remains in open position until the knob is screwed down again ● open and closed position is indicated
Item 1 2 2 12 13 14 16 19 22 23 24 25
Component Lever cover Cap Knob Spindle cap Bolt ring Pin O-ring Stopper Seal Seal wire Sealing nose
Cap H2 – Steel – – – – – – – Plastic 316SS 316L
Packed lever H4 AISI 430F – AISI 430F AISI 420 316SS 316SS Stainless Steel Viton AISI 430F Plastic 316SS 316L
Body Material Stainless Steel Cap H2 – 316L – – – – – – – Plastic 316SS 316L
Packed lever H4 316L – 316L 316L 316SS 316SS Stainless Steel Viton 316L Plastic 316SS 316L
22 16
2
14
12
2
19
1 Open
25
13
24
25
23
24 23
Closed
Cap H2
20
Packed lever H4
LWN 471.18
Threaded Safety Relief Valves Spring Loaded Accessories and Options · Metal Seat
Metal Seat (Type 437)
The LESER metal seats (disc and nozzle) are lapped to optical flatness to ensure a tight shut off. LESER safety relief valves are supplied with a standard leak tightness according to API 527. Type 4373 Standard material for the disc is a hardened stainless steel. The combination of a hard disc material and a softer seat material (316L) provides for improved wear resistance and longer product life. Type 4374 Disc and seat are provided in 316L material for highest corrosion resistance. Any other material which is available from bar stock can be supplied as well (e.g. Hastelloy®, Monel®, Alloy20,…).
57
57
7.3
7.3
7.1
7.1
7.2
7.2
1
1
Metal seat
Stellited sealing surfaces
Disc Materials subassembly Item 7 Item
Part Name
Type 4373 Body Material Chrome Steel
Type 4374 Body Material Stainless Steel
7.1
Disc
Hardened stainless steel Hardness 40 – 50 HRC
316L
7.2 7.3 57
Lifting aid Nut Pin
AISI 430F Steel 316
316L 316L 316
Item
Part Name
Optional stellited sealing surfaces
7.1
Disc
316L stellited Hardness 40 – 45 HRC
1
Inlet Body
316L stellited Hardness 40 – 45 HRC
LWN 471.19
Stellited sealing surfaces For high temperature applications, or applications with abrasive fluids wear resistant sealing surfaces are recommended. The sealing surfaces of the disc, seat or nozzle can be stellited by build-upwelding. The minimum thickness of the stellite is 0.06 inch. In addition to the corrosion resistance, the stellited surface also offers a high resistance to impact and sudden changes in temperature.
21
Series 437
Threaded Safety Relief Valves Spring Loaded Accessories and Options · Soft Seal
Soft Seal O-ring disc (Type 438) Vulcanized soft seal (Type 439) Disc with sealing plate (Type 437, optional)
57
Code letter 1
7.2
7.3
7.1
7.1 Code letter1
7.3
57 7.1
Code letter1
7.2
7.2
7.3
O-ring disc Type 438
Vulcanized soft seal disc Type 439
Disc with sealing plate Type 437
Application Type 437, 438 and 439 are provided with a soft seal disc for ● superior tightness ● maintained tightness close to the set pressure
Disc with vulcanized soft seal Type 439 with a vulcanized soft seat allows maintained tightness close to the set pressure especially at lower set pressures.
Disc with sealing plate For applications, where the increased tightness of a soft seal is required but the temperature is too low or too high for an o-ring-disc, e.g. liquefied gases.
Note:
Features and Benefits ● three different designs for extended application range ● minimized leakage and product loss ● large selection of soft seal materials ● simple replacement of soft seal ● standard ARP o-ring sizes ● one standard durometer per o-ring material ● reduced maintenance costs
Code letter: Please refer to soft seal selection table
1
For temperature limits and medium resistance refer to the soft seal selection table.
Materials – subassembly Item 7 Type 438 O-ring disc Item
22
Type 439 Vulcanized soft seal disc
Type 437 Disc with sealing plate
Part Name
Material
Part Name
Material
Part Name
Material
7.1
Disc
316L
Disc
316L with vulcanized soft seal, refer to soft seal selection table
Disc
316L
7.2
Lifting aid
316L
Lifting aid
316L
Lifting aid
7.3
O-ring
57
Pin
Refer to soft seal selection table –
Nut
316L
Sealing plate
Pin
316
Pin
316L Refer to soft seal selection table 316
LWN 471.20
Threaded Safety Relief Valves Spring Loaded Accessories and Options · Soft Seal
Type 437 Sealing plate Type 438 O-ring, Type 439 Vulcanized soft seal
Soft Seal Selection Abbrevation ASTM 1418
Designation Trade name
CR
Neoprene® (Chloroprene)
K
NBR
Buna - N® (Nitrile-Butadiene)
EPDM
Tmin Code- Option letter1 Code
Tmax Application 2
[ °F]
[ °C]
[ °F]
[ °C]
J21
-40
-40
212
100
Paraffin oil, silicone oil and grease, water and waterbased solvents, refrigerants, ozone
N
J30
-13
-25
230
110
Hydraulic oil, vegetable and animal grease and oil
Buna - EP® (Ethylene-Propylene Diene)
D
J22
-49
-45
302
150
Hot water and superheated steam up to 302°F, several organic and inorganic acids, silicone oil and grease, FDA compliant
FPM (FKM)
Viton® (Fluorocarbon)
L
J23
-4
-20
356
180
For high temperature service (no superheated steam), mineral oil and grease, silicone oil and grease, vegetable and animal grease and oil, ozone, FDA compliant compound available on request
FFKM3
Kalrez ® (Perfluoro)
C
J20
32
0
482
250
Nearly all chemicals, standard compound is Kalrez® 6375 with steam resistance, FDA compliant compound available on request
SP
VESPEL SP-1® (Polyimide)
T
J49
-454
-270
572
300
High temperature and high pressure applications (no steam), for chemical resistance refer to manufacturers guide
PCTFE
Kel-F® (Polychlorotrifluoroethylene)
G
J48
-454
-270
400
204
Cryogenic and refrigeration application, flammable media, gaseous oxygene application up to 725 psig at 140 ºF
PTFE
Teflon® (Polytetrafluoroethylene)
A
J44
-300
-184
302
150
Nearly all chemicals
Other
Notes:
1 2 3
Please LESER LLC
The code letters will be stamped on the disc. For soft seal materials other than listed the code letter X will be used. Pressure and temperature service must be considered in any case. For type 439: material is ISOLAST®.
Set Pressure Limits Sealing plate disc Pressure Range min.
Material
ed Trademarks
max.
[psig]
[bar]
[psig]
[bar]
VESPEL SP-1®
150
10
2610
180
Kel-F®
1.5
0.1
2610
180
Teflon®
LWN 471.21
1.5
0.1
145
10
Buna-N®, Teflon®, Viton®, VESPEL SP-1®, Neoprene®, Kalrez® Buna EP® Kel-F® ISOLAST®
Company
DuPont Bayer 3M Busak + Shamban
23
Series 437
Threaded Safety Relief Valves Spring Loaded Accessories and Options · Heating Jacket
Heating Jacket (Type 437)
Application Pressure relief valves in systems to be protected from media which are viscous, sticky or have a tendency to crystallize out of solution can be fitted with a heating jacket. For type 437 the outlet body is fitted with a fabricated heating jacket. The position of the heating connections is shown in figure 1.
Specifications of the heating jacket The operating data for the heating jacket are shown on a separate name plate. Operating Pressure
Operating Temperatures
pmax
Tmax
260 psig
410 °F
Available heating connections Connection
Option Code
Couplings FNPT
S02 + H29
Type 437 with heating jacket
24
LWN 471.22
Threaded Safety Relief Valves Spring Loaded Spare Parts · Discs · O-ring
Spare Parts
Discs – Type 437 metal to metal seat (Item 7) Valve Size
Orifice [Inch2 ]
Type 4373 Hardened stainless steel
Type 4374 Stainless Steel 316L
all
0.122
200.8739.9000
200.8749.9000
Discs – Type 438 soft seal with o-ring, disc material: 316L (Item 7) Valve Size
Orifice [Inch2 ]
all (standard version)
0.122
all (long version)
0.122
O-ring size ARP-no. 7
/16 x 3/32 ARP 111
7
/16 x 3/32 ARP 111
CR Neoprene
EPDM Ethylene
FPM (FKM) Viton
NBR Nitrile
FFKM Kalrez®
K
F
L
N
C
200.8349.9751
200.8349.9741
200.8349.9771
200.8349.9781
200.8349.9791
200.8549.9053
200.8549.9042
200.8549.9073
200.8549.9083
200.8549.9091
CR Neoprene
EPDM Ethylene
FPM (FKM) Viton
NBR Nitrile
FFKM Kalrez®
K
F
L
N
C
502.0107.2651
502.0107.2641
502.0107.2671
502.0107.2681
502.0107.2691
O-ring – Type 438 soft seal (Item 7.3) Valve Size
Orifice [Inch2 ]
all
0.122
O-ring size ARP-no. 7
/16 x 3/32 ARP 111
Discs – Type 439 with vulcanized soft seal (Item 7) Valve Size
Orifice [Inch2 ]
all
0.122
LWN 471.23
CR Neoprene
EPDM Ethylene
FPM (FKM) Viton
NBR Nitrile
FFKM ISOLAST®
K
F
L
N
C
200.9049.9051
200.9049.9041
200.9049.9071
200.9049.9081
200.9049.9091
25
Series 437
Threaded Safety Relief Valves Spring Loaded Spare Parts · Inlet Bodies
Inlet Bodies Types 437 Threaded connections – Material 316L (Item 1) Male NPT
Female NPT
Size
Orifice [Inch2 ]
Part Number
1
0.122
3
/4”
1”
/2”
Size
Orifice [Inch2 ]
Part Number
136.4449.9204
1
0.122
136.4449.9211
0.122
136.4549.9204
3
/4”
0.122
136.4549.9211
0.122
136.5849.9204
1”
0.122
136.5849.9211
/2”
Inlet Bodies Types 438 / 439 Threaded connections – Material 316L (Item 1) Male NPT Size
Orifice [Inch2 ]
Part Number
1
0.122
3
/4”
1”
/2”
26
Female NPT Size
Orifice [Inch2 ]
Part Number
136.4949.9204
1
0.122
136.4949.9211
0.122
136.5449.9204
3
/4”
0.122
136.5449.9211
0.122
136.6849.9204
1”
0.122
136.6849.9211
/2”
LWN 471.24
Threaded Safety Relief Valves Spring Loaded Approvals Series 437 · Rated slope
Approvals Series 437 Coefficient of Discharge 1 Country
Type
Fluid
Approval No.
437
S/G L S/G L
0.122
438 / 439
37213 37189 37190 37202
Code
Orifice
ASME Certified K
ASME Measured KD
0.458 0.333 0.406 0.322
0.509 0.370 0.451 0.358
United States
ASME Sec. VIII
Canada
CRN
437 / 438 / 439
S/G/L
OG0772.9C
0.122
Refer to ASME Sec. VIII
Country
Code
Type
Fluid
Approval No.
Orifice
Certified Coefficient of Discharge K dr
Europe
PED 97 / 23 / EC (CE-marking)
S/G L S/G L
072020111 Z0008/0/21-1
0.122
0.50 0.35 0.40 0.33
437 438 / 439
αw 437
AD 2000Merkblatt A2
Others
Notes:
1
438 / 439
S/G L S/G L
China: Russia:
CSBQTS DIN GOST
Ship classification authorities:
BV, DNV, GL, LROS, RINA
TUEV-SV 980
0.122
0.50 0.35 0.40 0.33
Acc. to ASME Sec. VIII the certified coefficient of discharge K is calculated by K = 0.9 * KD For sizing acc. to ASME Sec. VIII K must be used in the sizing equations.
Rated slope Within the capacity certification according to ASME Sec. VIII the coefficients of discharge for series 437 are issued as “rated slope values” instead of K values.
LWN 471.25
Rated slope values can be converted into K values. The table above shows the converted K values. The original rated slope values are listed below.
Fluid
Rated slope Type 437
Rated slope Type 438 /439
S
2.86 lb / hr / PSIA
2.55 lb / hr / PSIA
G
1.02 SCFM / PSIA
0.904 SCFM / PSIA
L
1.54 GPM √PSID
1.49 GPM / √PSID
27
Series 437
Threaded Safety Relief Valves Spring Loaded Capacities US Units · STEAM · AIR · WATER
Type 437 STEAM
AIR
WATER
ASME Section VIII [lb/ hr]
ASME Section VIII [S.C.F.M.]
ASME Section VIII [US - G.P.M.]
Capacities US Units
Capacities US Units
Set pressure [psig]
Orifice 0.122 Inch2
Set pressure [psig]
Orifice 0.122 Inch2
Set pressure [psig]
Orifice 0.122 Inch2
15 20 30 40 50 60 70 80 90 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 2000 2500 3000
94 108 137 168 200 232 263 295 326 358 421 484 547 611 674 737 800 863 926 990 1053 1116 1179 1242 1306 1621 1937 2253 2569
15 20 30 40 50 60 70 80 90 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 2000 2500 3000
33.5 38.6 48.9 60.1 71.4 82.7 93.9 105 117 128 150 173 195 218 241 263 286 308 331 353 376 398 421 443 466 579 692 804 917 1030 1143 1255 1368 1481 1594 1706 2270 2834
15 20 30 40 50 60 70 80 90 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 2000 2500 3000
6.54 7.39 8.86 10.2 11.4 12.5 13.5 14.5 15.3 16.2 17.7 19.1 20.5 21.7 22.9 24.0 25.0 26.1 27.1 28.0 28.9 29.8 30.7 31.5 32.3 36.2 39.6 42.8 45.7 48.5 51.1 53.6 56.0 58.3 60.5 62.6 72.3 80.8
Capacities for saturated steam according to ASME Section VIII (UV), based on set pressure plus 10 % overpressure. Capacities at 30 psig and bellow are based on 3 psig overpressure.
28
Capacities US Units
Capacities for air according to ASME Section VIII (UV), based on set pressure plus 10 % overpressure at 60 °F. Capacities at 30 psig and below are based on 3 psig overpressure.
Capacities for water according to ASME Section VIII (UV), based on set pressure plus 10 % overpressure at 68 °F. Capacities at 30 psig and below are based on 3 psig overpressure.
LWN 471.26
Threaded Safety Relief Valves Spring Loaded Capacities Metric Units · STEAM · AIR · WATER
Type 437 STEAM
AIR
WATER
ASME Section VIII [kg / hr]
ASME Section VIII [Sm3/ hr]
ASME Section VIII [103 kg/ hr]
Capacities Metric Units
Capacities Metric Units
Capacities Metric Units
Set pressure [bar]
Orifice 78.5 mm2
Set pressure [bar]
Orifice 78.5 mm2
Set pressure [bar]
Orifice 78.5 mm2
1 2 3 4 5 6 7 8 9 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200
42 61 81 102 123 144 165 185 206 227 269 310 352 393 435 476 518 560 601 643 684 726 768 809 851 1059 1267
1 2 3 4 5 6 7 8 9 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200
56 81 109 137 165 192 220 248 276 304 359 415 470 526 582 637 693 748 804 860 915 971 1026 1082 1138 1416 1694 1972 2250 2528 2806 3084 3362 3640 3918 4196 4474 4752 5030
1 2 3 4 5 6 7 8 9 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200
1.46 1.98 2.42 2.80 3.13 3.42 3.70 3.95 4.19 4.42 4.84 5.23 5.59 5.93 6.25 6.56 6.85 7.13 7.40 7.66 7.91 8.15 8.39 8.62 8.84 9.89 10.8 11.7 12.5 13.3 14.0 14.7 15.3 15.9 16.5 17.1 17.7 18.2 18.8
Capacities for saturated steam according to ASME Section VIII (UV), based on set pressure plus 10 % overpressure. Capacities at 2.07 bar (30 psig) and below are based on 0.207 bar (3 psig) overpressure.
LWN 471.27
Capacities for air according to ASME Section VIII (UV), based on set pressure plus 10 % overpressure at 16 °C. Capacities at 2.07 bar (30 psig) and below are based on 0.207 bar (3 psig) overpressure.
Capacities for water according to ASME Section VIII (UV), based on set pressure plus 10 % overpressure at 20 °C. Capacities at 2.07 bar (30 psig) and below are based on 0.207 bar (3 psig) overpressure.
29
Series 437
Threaded Safety Relief Valves Spring Loaded Capacities US Units · STEAM · AIR · WATER
Type 438 / 439 STEAM
AIR
WATER
ASME Section VIII [lb/ hr]
ASME Section VIII [S.C.F.M.]
ASME Section VIII [US - G.P.M.]
Capacities US Units
Capacities US Units
Set pressure [psig]
Orifice 0.122 Inch2
Set pressure [psig]
Orifice 0.122 Inch2
Set pressure [psig]
Orifice 0.122 Inch2
15 20 30 40 50 60 70 80 90 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 2000 2500
83 96 121 149 177 205 233 261 289 317 373 429 485 541 597 653 709 765 821 877 933 989 1045 1101 1157 1437
15 20 30 40 50 60 70 80 90 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 2000 2500
30 34 43 53 63 73 83 93 103 113 133 153 173 193 213 233 253 273 293 313 333 353 373 393 413 513 613 713 813 913 1013 1113 1213 1313 1413 1513 2012 2512
15 20 30 40 50 60 70 80 90 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 2000 2500
6.32 7.15 8.56 9.89 11.1 12.1 13.1 14.0 14.8 15.6 17.1 18.5 19.8 21.0 22.1 23.2 24.2 25.2 26.2 27.1 28.0 28.8 29.7 30.5 31.3 35.0 38.3 41.4 44.2 46.9 49.4 51.9 54.2 56.4 58.5 60.5 69.9 78.2
Capacities for saturated steam according to ASME Section VIII (UV), based on set pressure plus 10 % overpressure. Capacities at 30 psig and bellow are based on 3 psig overpressure.
30
Capacities US Units
Capacities for air according to ASME Section VIII (UV), based on set pressure plus 10 % overpressure at 60 °F. Capacities at 30 psig and below are based on 3 psig overpressure.
Capacities for water according to ASME Section VIII (UV), based on set pressure plus 10 % overpressure at 68 °F. Capacities at 30 psig and below are based on 3 psig overpressure.
LWN 471.28
Threaded Safety Relief Valves Spring Loaded Capacities Metric Units · STEAM · AIR · WATER
Type 438 / 439 STEAM
AIR
WATER
ASME Section VIII [kg / hr]
ASME Section VIII [Sm3/ hr]
ASME Section VIII [103 kg/ hr]
Capacities Metric Units
Capacities Metric Units
Capacities Metric Units
Set pressure [bar]
Orifice 78.5 mm2
Set pressure [bar]
Orifice 78.5 mm2
Set pressure [bar]
Orifice 78.5 mm2
1 2 3 4 5 6 7 8 9 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200
37 54 72 91 109 128 146 164 183 201 238 275 312 349 386 422 459 496 533 570 607 644 680 717 754
1 2 3 4 5 6 7 8 9 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200
50 72 97 121 146 171 195 220 244 269 318 368 417 466 516 565 614 663 713 762 811 861 910 959 1008 1255 1501 1748 1994 2241 2487 2734 2980 3227 3473 3720 3966 4213 4459
1 2 3 4 5 6 7 8 9 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200
1.42 1.91 2.34 2.70 3.02 3.31 3.58 3.82 4.06 4.28 4.68 5.06 5.41 5.74 6.05 6.34 6.62 6.89 7.15 7.40 7.65 7.88 8.11 8.33 8.55 9.56 10.5 11.3 12.1 12.8 13.5 14.2 14.8 15.4 16.0 16.6 17.1 17.6 18.1
Capacities for saturated steam according to ASME Section VIII (UV), based on set pressure plus 10 % overpressure. Capacities at 2.07 bar (30 psig) and below are based on 0.207 bar (3 psig) overpressure.
LWN 471.29
Capacities for air according to ASME Section VIII (UV), based on set pressure plus 10 % overpressure at 16 °C. Capacities at 2.07 bar (30 psig) and below are based on 0.207 bar (3 psig) overpressure.
Capacities for water according to ASME Section VIII (UV), based on set pressure plus 10 % overpressure at 20 °C. Capacities at 2.07 bar (30 psig) and below are based on 0.207 bar (3 psig) overpressure.
31
Series 437
Threaded Safety Relief Valves Spring Loaded Specification Sheet
636 326 9185
Please fax to: or your local representative
Specification Sheet
Company:
Phone:
Location:
Fax:
Name:
e-mail:
Reference:
Date:
GENERAL 1 ■ Item No.: 2 ■ Tag No.: 3 ■ Customer: 4 ● Equipment: 5 ● Enquiry/Order No.: 6 ● Delivery time: 7 ● Number of valves: 8 ● Number of spare valves:
9 ■ Basis of Selection: Code: ■ ASME VIII ■ PED 97/ 23 / EC (CE-marking) ■ other: 10 ■ Documentation: Material test report ■ inlet body ■ outlet body ■ other:
SERVICE CONDITIONS ■ Steam (S) 11 ■ Fluid and state: 12 ■ Molecular weight: 13 ● Coefficient C: 14 ● Ratio of specific heats k: 15 ● Compressibility factor Z: 16 ■ Spec. gravity / units: 17 ● Viscosity / units: 18 ■ Relieving temperature / units: 19 ■ Required capacity / units: VALVE CONSTRUCTION 27 ● Orifice Designation: 28 ● Connection inlet 29 ● Size: 30 ● Thread type or Flange class: ■ RJ 31 ● Facing type: ■ RF
20 21 22 23 24 25 26
3
of
■ Fire
■ Two phase
■ ...... % ■ 20 % ■ ...... %
■ other:
■ ■ ■ ■ ■
EPDM other: carbon steel other: Yes ■ No
■ cap H2
■ Please fill in these fields in any case. ● Please fill in these fields if possible. ▲ These fields will be completed by the supplier.
. Article No.
32
■ Liquid (L) Gas (G) Set pressure / units: Operating pressure / units: Cold diff. set pressure / units: Const. back pressure / units: Var. back pressure / units: ■ 10 % Overpressure: ■ 10 % Blowdown:
■ 4: Stainless steel 37 ● Soft seat ■ CR ■ NBR seal: ■ FPM ■ FFKM 38 ● Spring: ■ high temp. alloy steel ■ stainless steel 39 ● Comply with NACE MR 0175
SIZING AND SELECTION 42 ▲ Required orifice area / units: 43 ▲ Selected orifice area / units: 44 ▲ Coeff. of discharge: 45 ▲ Calculated capacity / units: Order Code
4
■ ■ ● ● ■ ■ ● ●
Connection outlet Size: Thread type or Flange class: ■ RF ■ RJ Facing type:
■ other:
MATERIALS 32 ● LESER Material Code ■ 3: Chrome steel 33 ● LESER Type: ■ 437 ■ 438 ■ 439 34 ■ Inlet body: 35 ● Outlet body: 36 ● Disc (Type 437): ■ SS hardened ■ 316L ● ■ other: ACCESSORIES AND OPTIONS 40 ■ Lifting lever: ■ packed H4 41 ● Others (specify):
Page:
Set Pressure
Connections
Options
Documentation
Code and Medium LWN 471.30
Threaded Safety Relief Valves Spring Loaded Series 459
Series 459
Type 459 / 462
Type 459 / 462 carbon steel LWN 471.31
33
Series 459
Threaded Safety Relief Valves Spring Loaded Materials Type 459
40
Materials Type 459
18
Threaded Connections 19
Item
Part Name
Type 4593 SG Iron
1 2
Inlet body Outlet body
SA 479 316L Gr. 60-40-18
Type 4592 Carbon Steel
Type 4594 Stainless Steel
SA 479 316L SA 479 316L
SA 479 316L SA 479 316L
Hardened Hardened stainless steel stainless steel
7
Disc
8
Guide
AISI 430F tenifer
9
Bonnet
Gr. 60-40-18
12
Spindle
AISI 420
Carbon Steel SA 105 AISI 420
14 16/17
Split ring Spring plate
AISI 430F Steel
AISI 430F Steel
316L 316L
18
Adjusting screw with bushing
AISI 430F PTFE
AISI 430F PTFE
316L PTFE
Lock nut Cap H2
Steel Steel
Steel Steel
316L 316L
Spring standard
Carbon Steel
Carbon Steel
Stainless Steel
19 40
54
Spring optional
AISI 430F tenifer
9 16 54
316L
12
316L
17 14
SA 479 316L 60
316L
8 57 61 7 2 1
Type 459
High temp. High temp. alloy steel or alloy steel or stainless steel stainless steel
57
Pin
316
316
316
40
60
Gasket
Graphite / 316L
Graphite / 316L
Graphite / 316L
18
61
Ball
316
316
316
19
SA 479 316L SA 479 316L 316L 316L 316L
SA 479 316L SA 479 316L 316L 316L 316L
Flanged Version 1 2 2.1 2.2 48
Inlet body SA 479 316L Outlet body Gr. 60-40-18 Outlet adaptor 316L Outlet flange 316L Inlet flange 316L
Schnitt 459 H2 male 4c
9 16 54 12 2.2
17
2.1
14 60 8 57 61 7 2 1 48
Type 459 Flanged version 34
LWN 471.32
Threaded Safety Relief Valves Spring Loaded Materials Type 459 – Balanced Bellows Design
Materials Type 459 – Balanced Bellows Design
40 18
Threaded Connections 19
Type 4592 Carbon Steel
Type 4594 Stainless Steel
SA 479 316L SA 479 316L
SA 479 316L SA 479 316L
Item
Part Name
Type 4593 SG Iron
1 2
Inlet body Outlet body
SA 479 316L Gr. 60-40-18
7
Disc
8
Guide
AISI 430F tenifer
AISI 430F tenifer
316L
9
Bonnet
Gr. 60-40-18
Carbon Steel SA 105
SA 479 316L
11 Bonnet spacer SA 479 316L 12 Spindle AISI 420 14 Split ring AISI 430F 15 Bellows 316L 16 / 17 Spring plate Steel
SA 479 316L AISI 420 AISI 430F 316L Steel
SA 479 316L 316L 316L 316L 316L
Hardened Hardened stainless steel stainless steel
54 12 17 14 60 11 15 60 57
Adjusting screw with bushing
AISI 430F PTFE
AISI 430F PTFE
316L PTFE
19 40
Lock nut Cap H2
Steel Steel
Steel Steel
316L 316L
Spring standard
Carbon Steel
Carbon Steel
Stainless Steel
Spring optional
16
316L
18
54
9
High temp. High temp. alloy steel or alloy steel or stainless steel stainless steel
57
Pin
316
316
316
60
Gasket
Graphite / 316L
Graphite / 316L
Graphite / 316L
61
Ball
316
316
316
SA 479 316L SA 479 316L 316L 316L 316L
SA 479 316L SA 479 316L 316L 316L 316L
61 7 2 1
Type 459 Balanced bellows design
Schnitt 459 H2 male SB 4c
Flanged Version 1 2 2.1 2.2 48
Inlet body SA 479 316L Outlet body Gr. 60-40-18 Outlet adaptor 316L Outlet flange 316L Inlet flange 316L
LWN 471.33
35
Series 459
Threaded Safety Relief Valves Spring Loaded Materials Type 462
40
Materials Type 462
18
Threaded Connections 19
Type 4622 Carbon Steel
Type 4624 Stainless Steel
Item
Part Name
Type 4623 SG Iron
1 2
Inlet body Outlet body
SA 479 316L Gr. 60-40-18
SA 479 316L SA 479 316L
SA 479 316L SA 479 316L
7
Disc with soft seal1
316L
316L
316L
12
8
Guide
AISI 430F tenifer
AISI 430F tenifer
316L
17
9
Bonnet
Gr. 60-40-18
Carbon Steel SA 105
SA 479 316L
12 14 16
Spindle Split ring Spring plate
AISI 420 AISI 430F Steel
AISI 420 AISI 430F Steel
316L 316L 316L
18
Adjusting screw with bushing
AISI 430F PTFE
AISI 430F PTFE
316L PTFE
19 40
Lock nut Cap H2
Steel Steel
Steel Steel
316L 316L
Spring standard
Carbon Steel
Carbon Steel
Stainless Steel
54
Spring optional
9 16 54
14 60 8 57 61 7 2 1
Type 462
High temp. High temp. alloy steel or alloy steel or stainless steel stainless steel Schnitt 462 H2 male 4c
57
Pin
316
316
316
60
Gasket
Graphite / 316L
Graphite / 316L
Graphite / 316L
40
61
Ball
316
316
316
18
Flanged Version 1 2 2.1 2.2 48 Note:
Inlet body SA 479 316L Outlet body Gr. 60-40-18 Outlet adaptor 316L Outlet flange 316L Inlet flange 316L CR NBR EPDM FPM FFKM
1
– – – – –
Neoprene Nitrile Ethylene / Propylene Fluorocarbon Kalrez®
SA 479 316L SA 479 316L 316L 316L 316L
9
SA 479 316L SA 479 316L 316L 316L 316L
16 54 12 2.2
2.1 17 60 8 7 2 1 48
Type 462 Flanged version 36
LWN 471.34
Threaded Safety Relief Valves Spring Loaded Materials Type 462 – Balanced Bellows Design
Materials Type 462 – Balanced Bellows Design
40 18
Threaded Connections
19
Type 4622 Carbon Steel
Type 4624 Stainless Steel
Item
Part Name
Type 4623 SG Iron
1 2
Inlet body Outlet body
SA 479 316L Gr. 60-40-18
SA 479 316L SA 479 316L
SA 479 316L SA 479 316L
7
Disc with soft seal1
316L
316L
316L
8
Guide
AISI 430F tenifer
AISI 430F tenifer
316L
9
Bonnet
Gr. 60-40-18
CarbonSteel SA 105
SA 479 316L
11 Bonnet spacer SA 479 316L 12 Spindle AISI 420 14 Split ring AISI 430F 15 Bellows 316L 16 / 17 Spring plate Steel
SA 479 316L AISI 420 AISI 430F 316L Steel
SA 479 316L 316L 316L 316L 316L
54 12 17
60 11 15 60 57
Adjusting screw with bushing
AISI 430F PTFE
AISI 430F PTFE
316L PTFE
19 40
Lock nut Cap H2
Steel Steel
Steel Steel
316L 316L
Spring standard
Carbon Steel
Carbon Steel
Stainless Steel
Spring optional
16
14
18
54
9
61 7 2 1
Type 462 Balanced bellows design
High temp. High temp. alloy steel or alloy steel or stainless steel stainless steel
57
Pin
316
316
316
60
Gasket
Graphite / 316L
Graphite / 316L
Graphite / 316L
61
Ball
316
316
316
SA 479 316L SA 479 316L 316L 316L 316L
SA 479 316L SA 479 316L 316L 316L 316L
Schnitt 462 H2 male SB 4c
Flanged Version 1 2 2.1 2.2 48 Note:
Inlet body SA 479 316L Outlet body Gr. 60-40-18 Outlet adaptor 316L Outlet flange 316L Inlet flange 316L CR NBR EPDM FPM FFKM
1
LWN 471.35
– – – – –
Neoprene Nitrile Ethylene / Propylene Fluorocarbon Kalrez®
37
Series 459
Threaded Safety Relief Valves Spring Loaded Materials Type 459 · Heavy Duty Design
40
Materials Type 459 Heavy Duty Design
18
Threaded Connections 19
Item
Part Name
Type 4594 Stainless Steel
1 2 7 8 9 12
Inlet body Outlet body Disc Guide Bonnet Spindle
SA 479 316L SA 479 316L 316L 316L SA 479 316L 316L
14 16/17
Split ring Spring plate
316L 316L
18
Adjusting screw with bushing
316L PTFE
Lock nut Cap H2 Spring
316L 316L Stainless Steel
Pin Gasket Ball
316 Graphite / 316L 316
19 40 54 57 60 61
9 16 54 12 17 14 60 8 57 61 7 2
Type 459 Heavy duty design
1
40 18 19 9 16 54 12 17 14 60 11 15 60 57 61 7 2 1
38
Type 459 Heavy duty design with balanced bellows
LWN 471.36
Threaded Safety Relief Valves Spring Loaded Material Options Type 4594
The Heavy Duty Design of Type 459 offers the possibility to easily obtain special material versions. The fact that all product wetted parts are machined from bar stock materials makes it easier and faster to fulfill almost all material requirements according to the material availability. Two special material levels are available: ● Level 1 special materials for the trim = wetted parts in closed position ● Level 2 special material for trim and outlet = wetted parts in open position
Material Options Type 4594 Heavy Duty Design Level 1 Trim Item
Part Name
Item
Part Name
1
Inlet body
1
Inlet body
7
Disc
2
Outlet body
7
Disc
11
Bonnet spacer
15
Bellows1
57
Pin
61
Ball
Option Code
Material
Option Code
Material
Grade HA
Hastelloy®
Grade HB
Hastelloy®
Grade MA
Monel®
Grade MB
Monel®
Grade DA
Duplex®
Grade DB
Duplex®
Note:
LWN 471.37
Level 2 Trim and Outlet
1
Available in 316L, Duplex®, Hastelloy®, Inconel®, Monel®. Other materials on request.
39
Series 459
Threaded Safety Relief Valves Spring Loaded How to Order – Numbering System
How to Order Numbering System
1
Article Number 1
2
3
Set Pressure
Please state unit (in gauge)!
4
Please do not exceed pressure range mentioned in the spring charts.
459 4 . 255 2 1
2
3
Connections
Please refer to table “Available Connections” on page 43. Please state one option code for each, inlet and outlet.
Type 459 / 462 Type
Types of sealing 459 Metal seat Metal-to-metal Metal-to-metal stellited Soft seat EPDM NBR CR FFKM (Kalrez®) FKM (Viton®) Plastic seat SP PCTFE PTDE-FDA
2
Vespel-SP1 Kel-F Teflon
462
✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
Material Code 2 – Body Material Carbon Steel 3 – Body Material SG iron 4 – Body Material Stainless Steel
3 Valve Code Identifies valve size, body material and orifice, refer to page 14.
4 Code for lifting device 2 – Screwed cap H2 3 – Plain lever H3 4 – Packed lever H4
40
4594.2552
100 psig
Article No.
Set Pressure
V62
V71 Connections
LWN 471.38
Threaded Safety Relief Valves Spring Loaded How to Order – Numbering System
4
Options
Type 459 / 462
Option Code
• Outlet body L19 heavy duty design (Type 459) • Inlet body stellited L20 (Type 459) • Soft seal material NBR “N” J30 (Type 462) EPDM “F” J22 CR “K” J21 FKM “L” J23 FFKM “C” J20 • Stainless steel bellows p < 580 psig J78 p > 580 psig J78 + J55 Hastelloy ® J81 • Elastomer bellows J79 • Heating jacket H29 • Heating jacket H33 bonnet spacer • High temperature X01 alloy spring • Stainless steel spring X04
J78
Documentation
6
Code and Medium
Please select requested documentation:
1
Material test certificate DIN EN 10204-3.1 Parts Inlet body Outlet body Bonnet Cap / lever cover Disc
H01 Options
LWN 471.39
5
Option Code H 01 L 34 L 30 L 31 L 23
2
1 . 1 1
Code 1. ASME Section VIII 2. CE / VdTUEV 3. ASME Section VIII + CE / VdTUEV
2
Medium .1 Gases .2 Liquids .3 Steam .0 Steam / Gases / Liquids (valid only for CE / VdTUEV)
L30
1.1
Documentation
Code and Medium
41
Series 459
Threaded Safety Relief Valves Spring Loaded How to Order · Article Numbers
How to order
Article Numbers Type 459 Type 4593 Body Material SG Iron
Type 4592 Body Material Carbon Steel
Type 4594 Body Material Stainless Steel
Orifice [Inch2 ]
Cap H2
Packed Lever H4
Plain Lever H3
Cap H2
Packed Lever H4
Plain Lever H3
Cap H2
Packed Lever H4
0.099
4593.2502
4593.2504
4593.2503
4592.2472
4592.2474
4592.2473
4594.2552
4594.2554
0.206
4593.2512
4593.2514
4593.2513
4592.2482
4592.2484
4592.2483
4594.2562
4594.2564
0.373
4593.2522
4593.2524
4593.2523
4592.2492
4592.2494
4592.2493
4594.2572
4594.2574
Article Numbers Type 462 Type 4623 Body Material SG Iron
Type 4622 Body Material Carbon Steel
Type 4624 Body Material Stainless Steel
Orifice [Inch2 ]
Cap H2
Packed Lever H4
Plain Lever H3
Cap H2
Packed Lever H4
Plain Lever H3
Cap H2
Packed Lever H4
0.099
4623.2902
4623.2904
4623.2903
4622.3772
4622.3774
4622.3773
4624.2952
4624.2954
0.206
4623.2912
4623.2914
4623.2913
4622.3782
4622.3784
4622.3783
4624.2962
4624.2964
0.373
4623.2922
4623.2924
4623.2923
4622.3792
4622.3794
4622.3793
4624.2972
4624.2974
Article Numbers Type 459 Heavy duty design
Article Numbers Type 462 Heavy duty design
Type 4594 Body Material Stainless Steel Orifice [Inch2 ]
Cap H2
Packed Lever H4
0.044 (L) 0.044 (S/G) 0.099 0.206
4594.2532 1 4594.2542 2 4594.2582 4594.2592
4594.2534 1 4594.2544 2 4594.2584 4594.2594
Notes:
1 2
42
Type 4624 Body Material Stainless Steel Orifice [Inch2 ]
Cap H2
Packed Lever H4
0.099
4624.2252
4624.2254
0.206
4624.2272
4624.2274
Liquid service Steam and gas service
LWN 471.40
Threaded Safety Relief Valves Spring Loaded How to Order · Available Connections
Male thread
Female thread
Flanged version
Available Connections – Threaded Option codes Schnitt 459 H2 female
Inlet Male NPT
Schnitt 459 H2 male 4cOrifice [Inch2 ]
Orifice [Inch2 ] Size
0.044
0.099
0.206
0.373
1
V61
V61
V61
–
3
/4”
V62
V62
V62
–
1”
V63
V63
V63
11/2”
–
–
–
/2”
Outlet4cFemale NPT
Inlet Female NPT
Size
Orifice [Inch2 ]
0.044
0.099
0.206
0.373
1
V58
V58
V58
–
3
/4”
V59
V59
V59
V59
V63
1”
V60
V60
V60
V64
11/2”
–
–
–
/2”
Size
0.044
0.099
0.206
0.373
1
–
–
–
–
3
/4”
–
–
–
–
V60
1”
V71
V71
V71
–
V75
11/2”
–
V72
V72
V72
/2”
Available Connections – Flanged ANSI B16.5 Option codes Inlet Orifice [Inch2 ] Size
ANSI-Class 150 300 / 600 1 ” /2 900 / 1500 2500 150 300 / 600 3 ” /4 900 / 1500 2500 150 300 / 600 1” 900 / 1500 2500 – 11/2” – – Notes:
1 2
0.044 V01 V02 V03 V04 V05 V06 V07 V08 V09 V10 V11 V12 – – –
0.099 V01 V02 V03 V04 V05 V06 V07 V08 V09 V10 V11 V12 – – –
0.206 – – – – V05 V06 V07 V08 V09 V10 V11 V12 – – –
Outlet Orifice [Inch2 ] 0.373 – – – – V05 V06 V07 V08 V09 V10 V11 V12 – – –
Size
ANSI-Class – – – – – – – – – – 150 300 / 6001 1” 9002 – 150 11/2” 300 / 600 900
0.044 – – – – – – – – V18 V19 V20 – – – –
0.099 – – – – – – – – V18 V19 V20 – V21 V22 V23
0.206 – – – – – – – – V18 V19 V20 – V21 V22 V23
0.373 – – – – – – – – – – – – V21 V22 V23
maximum inlet flange class: #1500 extended center to face dimension outlet: 4 3/4” (120 mm)
LWN 471.41
43
Series 459
Threaded Safety Relief Valves Spring Loaded Dimensions and Weights Type 459 / 462
Male thread
Female thread
Flanged version
Dimensions and Weights Threaded Connections US Units Center to Face [Inch] Connection Size [Inch]
Inlet Male a
1
/2” x 1” 3 ” x 1” /4 1” x 1” 3
/4” x 11/2” 1” x 11/2” 11/2” x 11/2” Note:
1
Female a 2 11/64 2 11/64 2 11/64 2 1/4 2 1/4 2 63/64
c
3
1 /4 1 3/4 1 47/64 1 29/32 1 57/64 2 1/8
55
/64 55 /64 1 1/8 55 /64 1 1/8 1 1/8
Height [Inch]
Weight [lbs]
Outlet
Standard
Bellows
b
Hmax. 11 11/16 11 11/16 11 27/32 11 27/32 12 1/64 12 1/8
Hmax.1 12 61/64 12 61/64 13 7/64 13 7/64 13 17/64 13 25/64
2
61
/64
m 5.7 5.7 5.7 6.6 6.6 6.6
not for orifice 0.044 inch2
Dimensions and Weights Flanged Connections US Units Center to Face [Inch] Orifice [Inch2]
0.044 0.099 0.206 0.373
44
Inlet 150 RF – 2500 RF a
300 RJ – 1500 RJ a
2500 RJ
15
7
31
3 /16 3 15/16 3 15/16 4 9/64
4 4 4 4
/32 /32 7 /32 9 /16 7
a 4 4 4 4
/64 /64 31 /64 27 /32
Height [Inch]
Weight [lbs]
Outlet
Standard
Bellows
150 RF – 600 RF b
H
H
m
63
– 14 1/4 14 1/4 14 3/8
17.6
31
3
15
/16
12 /64 12 63/64 12 63/64 13 7/64
LWN 471.42
Threaded Safety Relief Valves Spring Loaded Dimensions and Weights Type 459 / 462 · Flange Thickness
Dimensions and Weights Threaded Connections Metric Units Center to Face [mm] Connection Size [Inch]
Inlet Male a 45 45 44 49 48 54
1
/2” x 1” 3 /4” x 1” 1” x 1” 3
/4” x 11/2” 1” x 11/2” 11/2” x 11/2” Note:
1
Female a 55 55 55 57 57 76
c 22 22 27 22 27 27
Height [mm]
Weight [kg]
Outlet
Standard
Bellows
b
Hmax.
Hmax.1
m
75
275 275 274 279 278 281
307 307 306 311 310 313
2.6 2.6 2.6 3 3 3
not for orifice 0.044 inch2
Dimensions and Weights Flanged Connections Metric Units Center to Face [mm] Orifice [mm2]
Inlet 150 RF – 2500 RF a
300 RJ – 1500 RJ a
2500 RJ
100 100 100 105
107 107 107 116
114 114 114
28.2 63.6 133 241
a
Height [mm] Outlet
Standard
Bellows
150 RF – 600 RF b
Hmax.
Hmax.
330 330 330 333
–
100
123
Flange Thickness US Units
Class 150 s
1
/2” /4”
3
1” 11/2”
LWN 471.43
5
/8 /16 3 /4 15 /16
11
Flange Thickness [mm]
Class 900/1500
s
s
s
1
7
/16 /16 1 1/8 1 3/16 15
8
Flange Thickness Metric Units
Class 300/600
15
m
362 362 365
Flange Thickness [Inch] Connection Size [Inch]
Weight [kg]
1 /4 1 1/4 1 9/16 1 9/16
Class 2500
1 /16 1 1/2 1 5/8 2
Connection Size [Inch] 1
/2” /4”
3
1” 11/2”
Class 150
Class 300/600
Class 900/1500
Class 2500
s
s
s
s
17 17 19 24
25 25 28 31
33 32 39 40
37 39 42 53
45
Series 459
Threaded Safety Relief Valves Spring Loaded Pressure Temperature Ratings US Units – Type 459 / 462
Pressure Temperature Ratings US Units1 – Type 459 Set Pressure Range [psig]
Notes:
Orifice [Inch2]
min.
0.044 0.099 0.206 0.373
150 21.8 2.9 2.9
1 2 3
max. 8550 (11600)3 5800 2900 1450
Temperature Range acc. to ASME [°F] min. with bellows – 43.5 43.5 43.5
Carbon Steel
SG Iron
Stainless Steel
min.
max.
min.
max.
min.
max.
- 20
+ 572
- 20
+ 800 2
- 300
+ 800 2
Stainless Steel Heavy Duty Design
min.
max.
- 450 + 1000 2
for flanged versions the pressure temperature rating acc. to ANSI B 16.34 may supersede these limits above 572 °F / 300 °C stainless steel bellows is required for spring heat protection value in brackets: special spring required, expect longer lead time
Pressure Temperature Ratings US Units1 – Type 462 Set Pressure Range [psig]
Notes:
Orifice [Inch2]
min.
max.
min. with bellows
0.099 0.206 0.373
7.3 2.9 2.9
5075 2900 1450
43.5 43.5 43.5
1 2
46
Temperature Range acc. to ASME [°F] 2 SG Iron Carbon Steel Stainless Steel min. max. min. max. min. max. - 20
+ 356
- 20
+ 356
- 49
+ 356
for flanged versions the pressure temperature rating acc. to ANSI B 16.34 may supersede these limits the temperature is limited by the soft seal material, please refer to soft seal selection table on page 53
LWN 471.44
Threaded Safety Relief Valves Spring Loaded Pressure Temperature Ratings Metric Units – Type 459 / 462
Pressure Temperature Ratings Metric Units1 – Type 459 Set Pressure Range [bar]
Notes:
Orifice [mm2]
min.
28.2 63.6 133 241
10 1.5 0.2 0.2
1 2 3
min. with bellows
max. 590 (800) 400 200 100
Temperature Range acc. to ASME [°C]
3
– 3 3 3
Carbon Steel
SG Iron
Stainless Steel
Stainless Steel Heavy Duty Design
min.
max.
min.
max.
min.
max.
min.
max.
- 29
+ 300
- 29
+ 427 2
- 184
+ 427 2
- 268
+ 538 2
for flanged versions the pressure temperature rating acc. to ANSI B 16.34 may supersede these limits above 572 °F / 300 °C stainless steel bellows is required for spring heat protection value in brackets: special spring required, expect longer lead time
Pressure Temperature Ratings Metric Units1 – Type 462 Set Pressure Range [bar]
Notes:
Orifice [mm2]
min.
max.
min. with bellows
63.6 133 241
0.5 0.2 0.2
350 200 100
3 3 3
1 2
Temperature Range acc. to ASME [°C] 2 SG Iron Carbon Steel Stainless Steel min. max. min. max. min. max. - 29
+ 180
- 29
+ 180
- 45
+ 180
for flanged versions the pressure temperature rating acc. to ANSI B 16.34 may supersede these limits the temperature is limited by the soft seal material, please refer to soft seal selection table on page 53
LWN 471.45
47
Series 459
Threaded Safety Relief Valves Spring Loaded Accessories and Options · Caps and Levers
Accessories and Options Caps and Levers Series 459 is available with the following lever designs ● ● ● ●
Cap H2 Plain lever H3 Packed lever H4 Test gag, available for cap H2 and packed lever H4
Materials subassembly Item 40 Body Material Carbon Steel or SG Iron
Body Material Stainless Steel
Item
Component
Cap H2
Plain Lever H3
Packed Lever H4
Cap H2
Packed Lever H4
1.1 2 3a 3b 4 / 1.4 1.5 6 / 1.6 1.7 1.8 1.9 1.9 1.10 1.10 1.11 12 13 14 22 23 24 25 93 93.5
Lever cover Cap Spacer Hex screw Shaft / Bolt Lifting fork Lever Washer Nut O-ring Bushing Retaining clip Nut ring Spindle cap Pin Retaining clip Plug Seal Seal wire Sealing nose Test gag Washer
– Steel – – – – – – – – – – – – – – – – Plastic 316SS 316L 316SS Fiber
Gr. 60-40-18 – – B7 Steel Carbon Steel Carbon Steel Carbon Steel – – – Carbon Steel – – Carbon Steel 316SS 316SS Plastic Plastic 316SS – – –
Gr. 60-40-18 – 316L – Steel Carbon Steel Carbon Steel Carbon Steel 2H Viton – Carbon Steel – Carbon Steel Carbon Steel 316SS 316SS – Plastic 316SS – 316SS Fiber
– 316L – – – – – – – – – – – – – – – – Plastic 316SS 316L 316SS Fiber
CF8M – 316L – 316L 316L 316SS 316SS 8M – Graphite – 316L 316SS 316L 316SS 316SS – Plastic 316SS – 316SS Fiber
12
2
14
6
25
13 3b
24
1
23
22 23 24
10 4
Cap H2 48
Plain lever H3 LWN 471.46
Threaded Safety Relief Valves Spring Loaded Accessories and Options · Caps and Levers
93
93.5
1 12 14
13 1.5 1.6
24 23
3a
1.8 1.7
BLOCKED. Remove after testing!
1.10 1.11 1.9 1.4
Packed lever H4
LWN 471.47
Test gag
49
Series 459
Threaded Safety Relief Valves Spring Loaded Accessories and Options · Balanced Bellows
Balanced Bellows
Application Bellows protect the guides, moving parts and the spring from dirt, corrosion, impurities or temperature to guarantee the proper function of the safety relief valve. Additionally they provide for back pressure compensation 1.
Materials and Limits of Application Standard
Heavy Duty
Hastelloy®
Inconel®
Bellows material Bellows t materials
316L 316L
316L 316L
Hastelloy® C Hastelloy® C
Inconel® Inconel®
Option codes
J78
J78 + J55
J81 (Hastelloy®)
J78 + S15 (Inconel®)
Minimum set pressure limit
43.5 psig
580 psig
Maximum set pressure limit
580 psig
acc. to set pressure limit of the valve
Superimposed back pressure limit 3
232 psig
580 psig
Design Series 459 with balanced bellows is provided with a bonnet spacer to house the bellows. The spacer serves for cooling and shields the bellows against turbulences during discharge to avoid vibration and to guarantee longer lifetime.
Note s:
Built up back pressure limit 3
max. 35 % of set pressure, not to exceed the maximum bellows back pressure limit
Temperature limits (Type 459)
up to 752 °F
The bellows for type 459/462 is back pressure compensating for orifice size 0.206 Inch2 (133 mm2). It is over compensating for orifice size 0.099 Inch2 (63,6 mm2) and under compensating for orifice size 0.373 Inch2 (241 mm2). Please ask factory for details. 2 Type 4594 with heavy duty body: up to 1022 °F, the temperature limits for type 462 depend on other parts e.g. soft seal materials. 3 The so called built up back pressure limit defines limit for which the proper function of the pressure relief valve is ensured. The superimposed back pressure limit of a bellows refers only to the static stability of the bellows design and does not consider the influence of the backpressure on the opening and closing of a pressure relief valve. 1
Conversion kits are available for an easy change from a conventional design to a balanced bellows design. Conversion kits contain all necessary parts which must be replaced (bellows, spacer, spindle and gaskets). Please refer to page 56 Spare Parts.
50
LWN 471.48
Threaded Safety Relief Valves Spring Loaded Accessories and Options · Metal Seat
Metal Seat (Type 459)
The LESER metal seats (disc and nozzle) are lapped to optical flatness to ensure a tight shut off. LESER safety relief valves are supplied with a standard leak tightness according to API 527. Type 4592 / Type 4593 Standard material for the disc is a hardened stainless steel. The combination of a hard disc material and a softer seat material (316L) provides for improved wear resistance and longer product life.
57
57
7.1
7.1 7.3
7.3 7.2
7.2
1
1
Type 4594 Disc and seat are provided in 316L material for highest corrosion resistance. Any other material which is available from bar stock can be supplied as Monel®, well (e.g. Hastelloy®, Alloy20,…). Metal seat
Stellited sealing surfaces
Materials subassembly Item 7 Item
Part Name
Type 4593 Body Material SG Iron
Type 4592 Body Material Carbon Steel
Type 4594 Body Material Stainless Steel
7.1
Disc
Hardened stainless steel Hardness 40 – 50 HRC
Hardened stainless steel Hardness 40 – 50 HRC
316L
7.2 7.3 57
Lifting aid Retaining clip Pin
316L 316L 316
316L 316L 316
316L 316L 316
Item
Part Name
Optional stellited sealing surfaces
7.1
Disc
316L stellited Hardness 40 – 45 HRC
1
Inlet Body
316L stellited Hardness 40 – 45 HRC
LWN 471.49
Discs with stellited sealing surfaces For high temperature applications above 842 °F, or applications with abrasive fluids wear resistant sealing surfaces are recommended. The sealing surfaces of the disc, seat or nozzle can be stellited by build-upwelding. The minimum thickness of the stellite is 0.06 inch. In addition to the corrosion resistance, the stellited surface also offers a high resistance to impact and sudden changes in temperature.
51
Series 459
Threaded Safety Relief Valves Spring Loaded Accessories and Options · Soft Seal
Soft Seal O-ring disc (Type 462) Disc with sealing plate (Type 459, optional) Application Type 459 and 462 are provided with a soft seal disc for ● superior tightness ● maintained tightness close to the set pressure
57
57
2
2
Features and Benefits ● two designs with o-ring or sealing plate for extended application range ● minimized leakage and product loss ● large selection of soft seal materials ● simple replacement of soft seal ● standard ARP o-ring sizes ● reduced maintenance costs ● one standard durometer per o-ring material
3
3
1
1
4
4
For temperature limits and medium resistance refer to the soft seal selection table.
Disc with sealing plate Type 459
O-ring disc Type 462
Disc with sealing plate For applications, where the increased tightness of a soft seat seal is required but the temperature is too low or too high for an o-ring-disc, e.g. liquefied gases.
Materials subassembly Item 7 Type 462 O-ring disc
Item
52
Type 459 Disc with sealing plate
Item
1 2 3
Part Name Disc Lifting aid Pin
Material 316L 316L 316
1 2 3
Part Name Disc Lifting aid Retaining clip
Material 316L 316L 316L
4
O-ring
Refer to soft seal selection table
4
Sealing plate
Refer to soft seal selection table
57
Pin
316
57
Pin
316
LWN 471.50
Threaded Safety Relief Valves Spring Loaded Accessories and Options · Soft Seal
Soft Seal Selection Designation Trade name
Type 459 Sealing plate
Type 462 O-ring
Code
Code- Option letter 1 Code
Tmax
Tmin
Application 2 [ °F]
[ °C]
[ °F]
[ °C]
CR
Neoprene® (Chloroprene)
K
J21
-40
-40
212
100
Paraffin oil, silicone oil and grease, water and waterbased solvents, refrigerants, ozone
NBR
Buna - N® (Nitrile-Butadiene)
N
J30
-13
-25
230
110
Hydraulic oil, vegetable and animal grease and oil
EPDM
Buna - EP® (Ethylene-Propylene Diene)
D
J22
-49
-45
302
150
Hot water and superheated steam up to 302°F, several organic and inorganic acids, silicone oil and grease, FDA compliant
FPM (FKM)
Viton® (Fluorocarbon)
L
J23
-4
-20
356
180
For high temperature service (no superheated steam), mineral oil and grease, silicone oil and grease, vegetable and animal grease and oil, ozone, FDA compliant compound available on request
FFKM
Kalrez ® (Perfluoro)
C
J20
32
0
482
250
Nearly all chemicals, standard compound is Kalrez® 6375 with steam resistance, FDA compliant compound available on request
SP
VESPEL SP-1® 1 (Polyimide)
T
J49
-454
-270
572
300
High temperature and high pressure applications (no steam), for chemical resistance refer to manufacturers guide
PCTFE
Kel-F® (Polychlorotrifluoroethylene)
G
J48
-454
-270
400
204
Cryogenic and refrigeration application, flammable media, gaseous oxygene application up to 725 psig at 140 ºF
PTFE
Teflon® (Polytetrafluoroethylene)
A
J44
-300
-184
302
150
Nearly all chemicals
Other
Notes:
1 2
Please LESER LLC
The code letters will be stamped on the retainer (Item 2). For soft seal materials other than listed the code letter X will be used. Pressure and temperature service must be considered in any case.
Set Pressure Limits Sealing plate disc Pressure Range min.
Material VESPEL SP-1®
ed Trademarks
max.
[psig]
[bar]
[psig]
[bar]
150
10
5800
400
2.9
0.2
4350
300
Teflon®
2.9
0.2
145
10
LWN 471.51
Viton®, VESPEL SP-1®, Neoprene®, Kalrez® Kel-F®
Company
Teflon®,
Buna EP®
®
Kel-F
Buna-N®,
DuPont Bayer 3M
53
Series 459
Threaded Safety Relief Valves Spring Loaded Accessories and Options · Heating Jacket
Heating Jacket
Application Pressure relief valves in systems to be protected from media which are viscous, sticky or have a tendency to crystallize out of solution can be fitted with a heating jacket. For type 459 the outlet body is fitted with a fabricated heating jacket. The position of the heating connections is shown in the drawing.
Balanced Bellows Design For safety relief valves with balanced bellows, the bonnet spacer required to house the bellows is fitted with an additional heating jacket. Both heating jackets are ed by a tubing.
Specifications of the heating jacket The operating data for the heating jacket are shown on a separate name plate.
Operating Pressure
Operating Temperatures
pmax
Tmax
260 psig
572 °F
Available heating connections Type 459 with heating jacket
54
Connection
Option Code
Couplings FNPT
H29
LWN 471.52
Threaded Safety Relief Valves Spring Loaded Accessories and Options · Lift Indicator
Lift Indicator (proximity switch)
Lift indicators are an important component for automation. They are used to monitor operating status. As an option, Series 459 can be provided with an inductive proximity switch. The lift indicator will indicate an opening of the pressure relief valve when the vessel pressure has increased so that the valve opens with a “pop”. LESER provides DC proximity switches type “N” using two-wire technology. These intrinsically safe proximity switches can be used in explosion hazard area zone 0. Other types of switches can be used as well.
B
A
94
The lift indicator option is available for series 459 in combination with the packed lever H4 either with or without proximity switch. The connection size is M18 x 1. A = closed position B = open position
LWN 471.53
Option
Option Code
Lifting device H4 with adaptor for lift indicator M18 x 1
J39
Lift indicator type PEPPERL + FUCHS NJ5-18GK-N (5 V to 25 V d.c.)
J93
55
Series 459
Threaded Safety Relief Valves Spring Loaded Spare Parts · Discs
Spare Parts
Discs – Type 459 metal to metal seat (Item 7) Type 4594 316L
Orifice [Inch2 ]
Type 4592 / 4593 Hardened stainless steel
0.044
–
0.099
200.2039.9000
200.2049.9000
0.206
200.2139.9000
200.2149.9000
0.373
200.2239.9000
200.2249.9000
Steam and gas service: 200.3269.9118 Liquid service: 200.3969.9118
Discs – Type 462 soft seal, disc material: 316L (Item 7) Orifice [Inch2 ]
O-ring size ARP-no. 1
0.099
/2 x 3/32
ARP 112 9
0.206
/16 x 3/32 ARP 113
13
0.373
/16 x 3/32 ARP 117
CR Neoprene
EPDM Ethylene
FPM (FKM) Viton®
NBR Nitrile
FFKM Kalrez®
K
D
L
N
C
200.9349.9051
200.9349.9041
200.9349.9071
200.9349.9081
200.9349.9091
200.4549.9051
200.4549.9041
200.4549.9071
200.4549.9081
On Request
200.4649.9051
200.4649.9041
200.4649.9071
200.4649.9081
On Request
CR Neoprene
EPDM Ethylene
FPM (FKM) Viton®
NBR Nitrile
FFKM Kalrez®
K
D
L
N
C
502.0123.2651
502.0123.2641
502.0123.2671
502.0123.2681
502.0123.2691
502.0139.2651
502.0139.2641
502.0139.2671
502.0139.2681
On Request
502.0202.2651
502.0202.2641
502.0202.2671
502.0202.2681
On Request
O-ring – Type 462 soft seal (Item 7) Orifice [Inch2 ]
O-ring size ARP-no. 1
0.099
3
/2 x /32 ARP 112
9
0.207
/16 x 3/32 ARP 113
13
0.373
56
/16 x 3/32 ARP 117
LWN 471.54
Threaded Safety Relief Valves Spring Loaded Spare Parts · Inlet Bodies · Inlet Bodies and Flanges · Bellows · Gaskets
Inlet Bodies Type 459 / 462 Threaded connections – Material 316L (Item 1) Male NPT Orifice [Inch2 ]
Size 1 ” /2 3 ” /4 1” 3 ” /4 1” 11/2” 3 ” /4 1” 11/2” 1” 11/2”
Female NPT Inlet Body 136.6969.9204 136.7069.9204 136.7169.9204 136.7549.9204
0.044
0.099
136.7649.9204 136.7849.9204 136.8049.9204
0.206
136.8149.9204 136.8349.9204 136.3649.9204
0.373
Size 1 ” /2 3 ” /4 1” 3 ” /4 1” 11/2” 3 ” /4 1” 11/2” 1” 11/2”
136.8649.9204
Orifice [Inch2 ] 0.044
0.099
0.206
0.373
Inlet Body 136.6969.9211 136.7069.9211 136.7169.9211 136.7549.9211 136.7649.9211 136.7849.9211 136.8049.9211 136.8149.9211 136.8349.9211 136.3649.9211 136.8649.9211
Bellows and Bellows Conversion Kits – Material 316L (Item 15)
Note:
Valve Size
Set pressure
Bellows
Conversion Kit
all1
p ≤ 580 psig (40 bar)
400.7949.0000
5021.1050
all1
p > 580 psig (40 bar)
400.6349.0000
5021.1051
1
The bellows for type 459 / 462 is back pressure compensating for orifice size 0.206 In2 (133 mm2).
Gaskets Body – Bonnet (Item 60) Valve Size
Gasket
Material
all
500.2407.0000
Graphite + 316 SS
all
500.2405.0000
Gylon (filled PTFE)
LWN 471.55
57
Series 459
Threaded Safety Relief Valves Spring Loaded Approvals Series 459
Approvals Series 459 Coefficient of Discharge1 Country
Code
Type
Fluid
Approval No.
Orifice
ASME Certified K
ASME Measured KD
United States
ASME Sec. VIII
459 / 462
S/G L
37112 37101
All All
0.811 0.566
0.901 0.629
Canada
CRN
459 / 462
S/G/L
OG0730.9C
All
Refer to ASME-code
Country
Code
Type
Fluid
Approval No.
Orifice
Certified Coefficient of Discharge K dr
S/G L
Europe
PED 97/23/EC (CE-marking)
459 / 462
S/G L S/G L
0.044
072020111 Z0008/0/13
S/G L
0.099 0.206 0.373
0.81 0.70 0.83 0.61 0.81 0.53 2 0.79 0.52 αw
S/G L
Others
Note:
58
AD 2000Merkblatt A2
China: Russia: Ship classification authorities:
459 / 462
S/G L S/G L
0.044 0.099 TUEV-SV 909
S/G L SELO / AQSIQ (SQLBPV) DIN GOST
0.206 0.373
0.81 0.70 0.83 0.61 0.81 0.53 2 0.79 0.52
BV, DNV, GL, LROS, RINA
Acc. to ASME Sec. VIII the certified coefficient of discharge K is calculated by K = 0.9 * KD For sizing acc. to ASME Sec. VIII K must be used in the sizing equations. 2 Type 462: K dr = 0.61 / α w = 0.61 1
LWN 471.56
Threaded Safety Relief Valves Spring Loaded Capacities US Units / Metric Units · STEAM
Type 459 / 462 STEAM
STEAM
ASME Section VIII [lb/ hr]
ASME Section VIII [kg / hr]
Capacities US Units
Capacities Metric Units Orifice [Inch2 ]
Set pressure [psig] 15 20 30 40 50 60 70 80 90 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 2000 2500
Orifice [mm2 ]
0.044
0.099
0.206
0.373
349 389 430 470 510 550 591 631 671 711 752 792 832 1034 1235 1436 1638 1839 2040 2242 2443 2644 2842 3062 4233 5602
155 196 242 287 332 377 423 468 513 604 695 785 876 966 1057 1148 1238 1329 1419 1510 1601 1691 1782 1872 2326 2779 3232 3685 4138 4591 5044 5497 5950 6394 6889 9525 12604
281 324 410 504 599 693 788 882 977 1071 1260 1449 1638 1827 2016 2205 2394 2584 2773 2962 3151 3340 3529 3718 3907 4852 5797 6742 7688 8633 9578 10523 11469 12414 13340 14373 19872 26298
509 586 742 913 1085 1256 1427 1599 1770 1941 2284 2626 2969 3311 3654 3996 4339 4682 5024 5367 5709 6052 6394 6737 7080 8792 10505 12218 13931 15644 17357 19070 20782 22495 24174
Set pressure [bar] 1 2 3 4 5 6 7 8 9 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200
28.2
63.3
133
241
145 171 198 224 251 277 304 330 357 383 410 436 463 489 516 542 675 807 940 1072 1205 1340 1487 1638 1794 1956 2126 2305 2496 2701 2926 3176
87 117 147 176 206 236 266 296 326 385 445 505 564 624 683 743 803 862 922 982 1041 1101 1161 1220 1518 1817 2115 2413 2711 3015 3345 3685 4036 4401 4783 5186 5615 6077 6583 7146
125 182 244 306 368 430 493 555 617 679 804 928 1053 1177 1301 1426 1550 1675 1799 1924 2048 2173 2297 2421 2546 3168 3790 4412 5035 5657 6290 6978 7687 8421 9183 9980 10821 11716 12680 13734 14909
227 330 442 555 667 780 893 1005 1118 1231 1456 1682 1907 2133 2358 2584 2809 3035 3260 3486 3711 3937 4162 4388 4613 5741 6868 7996 9123 10251 11398
Capacities for saturated steam according to ASME Section VIII (UV), based on set pressure plus 10 % overpressure. Capacities at 30 psig (2.07 bar) and bellow are based on 3 psig (0.207 bar) overpressure.
LWN 471.57
59
Series 459
Threaded Safety Relief Valves Spring Loaded Capacities US Units / Metric Units · AIR
Type 459 / 462 AIR
AIR
ASME Section VIII [S.C.F.M.]
ASME Section VIII [Sm3/ hr]
Capacities US Units
Capacities Metric Units Orifice [Inch2 ]
Set pressure [psig] 15 20 30 40 50 60 70 80 90 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 2000 2500 3000 3500 4000 4500 5000 6000 7000 8000 9000 10000 11000
0.044
125 139 154 168 182 197 211 226 240 254 269 283 298 370 442 514 586 658 730 802 874 946 1018 1090 1450 1810 2170 2530 2890 3250 3610 4330 5050 5770 6490 7211 7931
0.099
55 70 86 103 119 135 151 167 184 216 248 281 313 346 378 410 443 475 508 540 572 605 637 670 832 994 1156 1318 1480 1642 1804 1966 2128 2290 2452 3262 4072 4882 5692 6502 7313 8123
Orifice [mm2 ] 0.206
0.373
100 115 146 180 213 247 281 315 348 382 449 517 584 652 719 787 854 921 989 1056 1124 1191 1259 1326 1393 1731 2068 2405 2742 3079 3416 3753 4091 4428 4765 5102 6788 8473
181 209 264 326 387 448 509 570 631 692 814 936 1058 1180 1302 1424 1546 1669 1791 1913 2035 2157 2279 2401 2523 3134 3744 4354 4965 5575 6186 6796 7407 8017 8628
Set pressure [bar] 1 2 3 4 5 6 7 8 9 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 250 300 350 400 500 600 700 800
28.2
194 229 265 300 336 371 407 442 478 513 549 585 620 656 691 727 904 1082 1259 1437 1614 1792 1969 2147 2325 2502 2680 2857 3035 3212 3390 3568 4455 5343 6231 7119 8894 10670 12446 14221
63.3
117 157 196 236 276 316 356 396 436 516 596 676 756 836 916 996 1075 1155 1235 1315 1395 1475 1555 1635 2034 2434 2833 3233 3632 4032 4431 4831 5230 5630 6029 6429 6828 7228 7627 8027 10024 12022 14020 16017
133
241
168 243 326 409 492 575 658 741 825 908 1074 1240 1406 1573 1739 1905 2071 2238 2404 2570 2737 2903 3069 3235 3402 4233 5064 5895 6727 7558 8389 9221 10052 10883 11715 12546 13377 14209 15040 15871 16702
303 440 590 740 891 1041 1192 1342 1493 1643 1944 2246 2547 2848 3149 3450 3751 4052 4353 4654 4955 5256 5557 5858 6159 7664 9170 10675 12180 13685 15190
Capacities for air according to ASME Section VIII (UV), based on set pressure plus 10 % overpressure at 60 °F (16 °C). Capacities at 30 psig (2.07 bar) and below are based on 3 psig (0.207 bar) overpressure. 60
LWN 471.58
Threaded Safety Relief Valves Spring Loaded Capacities US Units / Metric Units · WATER
Type 459 / 462 WATER
WATER
ASME Section VIII [US - G.P.M.]
ASME Section VIII [103 kg/ hr]
Capacities US Units
Capacities Metric Units Orifice [Inch2 ]
Set pressure [psig] 15 20 30 40 50 60 70 80 90 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 2000 2500 3000 3500 4000 4500 5000 6000 7000 8000 9000 10000 11000
0.044
12.5 13.3 14.0 14.7 15.4 16.0 16.6 17.2 17.7 18.3 18.8 19.3 19.8 22.2 24.3 26.2 28.0 29.7 31.3 32.9 34.3 35.7 37.1 38.4 44.3 49.6 54.3 58.6 62.7 66.5 70.1 76.8 82.9 88.6 94.0 99.1 104
0.099
10.2 12.2 14.1 15.8 17.3 18.7 19.9 21.2 22.3 24.4 26.4 28.2 29.9 31.5 33.1 34.5 36.0 37.3 38.6 39.9 41.1 42.3 43.5 44.6 49.9 54.6 59.0 63.1 66.9 70.5 74.0 77.2 80.4 83.4 86.4 99.7 111 122 132 141 150 158
Orifice [mm2 ] 0.206
0.373
18.8 21.2 25.4 29.3 32.8 35.9 38.8 41.5 44.0 46.4 50.8 54.9 58.7 62.3 65.6 68.8 71.9 74.8 77.6 80.4 83.0 85.6 88.0 90.5 92.8 104 114 123 131 139 147 154 161 167 174 180 208 232
34.0 38.4 46.0 53.1 59.4 65.1 70.3 75.1 79.7 84.0 92.0 99.4 106 113 119 125 130 135 141 146 150 155 159 164 168 188 206 222 238 252 266 279 291 303 314
Set pressure [bar] 1 2 3 4 5 6 7 8 9 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 250 300 350 400 500 600 700 800
28.2
2.71 2.97 3.21 3.43 3.64 3.83 4.02 4.20 4.37 4.53 4.69 4.85 5.00 5.14 5.28 5.42 6.06 6.64 7.17 7.67 8.13 8.57 8.99 9.39 9.77 10.1 10.5 10.8 11.2 11.5 11.8 12.1 13.6 14.8 16.0 17.1 19.2 21.0 22.7 24.2
63.3
2.73 3.34 3.86 4.31 4.72 5.1 5.45 5.78 6.1 6.68 7.22 7.71 8.18 8.62 9.04 9.45 9.83 10.2 10.6 10.9 11.2 11.6 11.9 12.2 13.6 14.9 16.1 17.2 18.3 19.3 20.2 21.1 22.0 22.8 23.6 24.4 25.1 25.9 26.6 27.3 30.5 33.4 36.1 38.6
133
241
4.20 5.68 6.95 8.02 8.97 9.83 10.6 11.3 12.0 12.7 13.9 15.0 16.0 17.0 17.9 18.8 19.7 20.5 21.2 22.0 22.7 23.4 24.1 24.7 25.4 28.4 31.1 33.6 35.9 38.1 40.1 42.1 44.0 45.7 47.5 49.1 50.8 52.3 53.8 55.3 56.7
7.61 10.3 12.6 14.5 16.2 17.8 19.2 20.5 21.8 23.0 25.2 27.2 29.1 30.8 32.5 34.1 35.6 37.0 38.4 39.8 41.1 42.4 43.6 44.8 45.9 51.4 56.3 60.8 65.0 68.9 72.7
Capacities for water according to ASME Section VIII (UV), based on set pressure plus 10 % overpressure at 68 °F (20 °C). Capacities at 30 psig (2.07 bar) and below are based on 3 psig (0.207 bar) overpressure. LWN 471.59
61
Series 459
Threaded Safety Relief Valves Spring Loaded Specification Sheet
636 326 9185
Please fax to: or your local representative
Specification Sheet
Company:
Phone:
Location:
Fax:
Name:
e-mail:
Reference:
Date:
GENERAL 1 ■ Item No.: 2 ■ Tag No.: 3 ■ Customer: 4 ● Equipment: 5 ● Enquiry/Order No.: 6 ● Delivery time: 7 ● Number of valves: 8 ● Number of spare valves:
9 ■ Basis of Selection: Code: ■ PED 97/ 23 / EC (CE-marking) ■ Two phase flow ■ other: 10 ■ Documentation: Material test report ■ inlet body ■ outlet body ■ bonnet: ■ other:
SERVICE CONDITIONS 11 ■ Fluid and state: ■ Steam (S) 12 ■ Molecular weight: 13 ● Coefficient C: 14 ● Ratio of specific heats k: 15 ● Compressibility factor Z: 16 ■ Spec. gravity / units: 17 ● Viscosity / units: 18 ■ Relieving temperature / units: 19 ■ Required capacity / units: VALVE CONSTRUCTION 27 ● Orifice Designation: 28 ● Connection inlet 29 ● Size: 30 ● Thread type or Flange class: 31 ● Facing type: ■ RF ■ RJ
20 21 22 23 24 25 26
Gas (G) ■ Liquid (L) Set pressure / units: Operating pressure / units: Cold diff. set pressure / units: Const. back pressure / units: Var. back pressure / units: Overpressure: ■ 10 % Blowdown: ■ 10 %
■ 3: SG Iron 38 ● Soft seat ■ CR ■ NBR seal: ■ FPM ■ FFKM 39 ● Bellows: ■ 316L ■ Inconel® 40 ● Spring: ■ high temp. alloy ■ stainless steel 41 ● Comply with NACE MR 0175
ACCESSORIES AND OPTIONS 42 ■ Lifting lever: ■ plain H3 ■ packed H4 ■ cap H2 43 ● Test gag: ■ yes ■ no
44 ● Bellows: ■ yes 45 ● Others (specify):
SIZING AND SELECTION 46 ▲ Required orifice area / units: 47 ▲ Selected orifice area / units: 48 ▲ Coeff. of discharge: 49 ▲ Calculated capacity / units: Order Code
of
■ ASME VIII ■ Fire
■ Two phase
■ ...... % ■ 20 % ■ ...... %
■ other:
■ 4: Stainless steel ■ EPDM ■ other: ■ Hastelloy® ■ other: steel ■ carbon steel ■ other: ■ Yes ■ No ■ no
■ Please fill in these fields in any case. ● Please fill in these fields if possible. ▲ These fields will be completed by the supplier.
. Article No.
62
■ ■ ● ● ■ ■ ● ●
Connection outlet Size: Thread type or Flange class: Facing type: ■ RF ■ RJ
■ other:
MATERIALS 32 ● LESER Material Code ■ 2: Carbon Steel 33 ● LESER Type ■ 459 ■ 462 34 ■ Inlet Body: 35 ● Outlet Body: 36 ● Bonnet: 37 ● Disc (metal): ■ SS hardened ■ 316L ■ other:
4
Page:
Set Pressure
Connections
Options
Documentation
Code and Medium LWN 471.60
First in safety … … a not so brief history of LESER History
Safe solutions from the specialist
Where to find LESER
The company started in 1818 as a brass foundry and over the decades developed a product portfolio of components for mechanical equipment and machines during the “industrial revolution”. At first LESER specialized on tough applications and its level gauges for steam boilers were famous. Soon, the company delivered their first safety valve and as a consequence of quick growing industrialization and improving demand for safety, LESER rapidly became the specialist for safety valves.
Today, LESER´s product range includes 23 different designs with a variety of materials and sizes from 1/2” to 16”, providing safe solutions for almost every application with ● Full lift safety valves ● High-pressure safety valves ● Safety valves according to API 526 ● Relief and safety relief valves ● Clean service safety relief valves ● Safety valves for critical service conditions ● Safety valves according to special standards and regulation ● Safety valves with supplementary pneumatic load ● Special versions
Headquartered in , with a state-of-the-art factory and more than 290 employees, LESER is present through subsidiaries and qualified partners in over 40 countries, providing products and services worldwide.
Type 441
For the nearest source please us at:
LESER LLC 1664 Headland Drive Fenton, MO 63026 Phone: 636 - 343 - 8766 Fax: 636 - 326 - 9185 e-mail: [email protected] www.leserusa.com
Type 459
Type 437
Type 526
LESER’s factory today
Type 488
LESER Headquarter 1818 – 1914
Compact Performance Catalog Edition July 2005 LWN 471.01-471.60 / 07.2005 / 3000
The Safety Valve LESER LLC
1664 Headland Drive Fenton, MO 63026
Phone: 636 - 343 - 8766 636 - 326 - 9185 Fax:
e-mail: [email protected] www.leserusa.com
Related Documents 171j1w
Leser Compact Performance 6f576x
November 2022 0
437 Leser 3d1d2d
March 2023 0
Leser Psv Type 447 6q6nl
March 2023 0
Leser 526 Api Catalog 4r491k
December 2019 36
Leser At A Glance Es 1vk1i
May 2022 0
Compact Houses.pdf 4v1i5w
May 2020 28More Documents from "Billy Isea Denaro" 183429
Leser Compact Performance 6f576x
November 2022 0
Leser 526 Api Catalog 4r491k
December 2019 36
Pressure Reducing Regulator Fisher Manual Serie 64 181o6k
December 2019 62
Actividad 1 Gastronomia Colombiana q2742
January 2023 0
2c82t
December 2019 80