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Type 437 Application range of conventional design and long version Type 437 Application range Type 4373 Type 4374 Conventional design S/G/L Act. Orifice d 0 [mm] 10 diameter [inch] 0,394 Act. Orifice A 0 [mm 2 ] 78,5 area [inch 2 ] 0,122 Components Materials Base / 1.4104 Inlet Body SA 479 430 Disc 1.4122 Hardened stainless steel S/G/L Act. Orifice d 0 [mm] 10 diameter [inch] 0,394 Act. Orifice A 0 [mm 2 ] 78,5 area [inch 2 ] 0,122 Components Materials Base / 1.4104 Inlet Body SA 479 430 Disc 1.4122 Hardened stainless steel Long version S/G Act. Orifice d 0 [mm] 6 diameter [inch] 0,236 Act. Orifice A 0 [mm 2 ] 28,3 area [inch 2 ] 0,044 Components Base / Inlet Body Materials 1.4404 Stellited SA 479 316L Stellited 1.4404 Stellited SA 479 316L Stellited Set pressure p [psig] 0 986 1349 2611 4786 5294 5511 0 68 93 180 330 365 380 Long version Set pressure p [bar] Also useable above 330 bar (4786 psig) but S/G/L S/G TÜV requirements will not be fulfilled Conventional design S/G/L Act. Orifice d 0 [mm] 10 diameter [inch] 0,394 Act. Orifice A 0 [mm 2 ] 78,5 area [inch 2 ] 0,122 Components Materials Base / 1.4404 Inlet Body SA 479 316L Disc 1.4404 SA 479 316L Act. Orifice d 0 [mm] 10 diameter [inch] 0,394 Act. Orifice A 0 [mm 2 ] 78,5 area [inch 2 ] 0,122 Components Materials Base / 1.4404 Inlet Body SA 479 316L Disc 1.4404 SA 479 316L Disc Act. Orifice d 0 [mm] 6 diameter [inch] 0,236 Act. Orifice A 0 [mm 2 ] 28,3 area [inch 2 ] 0,044 Components Base / Inlet Body Disc Materials 1.4404 Stellited SA 479 316L Stellited 1.4404 Stellited SA 479 316L Stellited 01/20 LWN 481.01-E
Type Type 438 Packed knob H4 Conventional design 438 Type 438 Safety Relief Valves – spring loaded Type 438 Packed knob H4 Flanged connection Type 438 Cap H2 Long version Contents Chapter/Page Materials • Available designs 02/02 • Available designs – materials 02/03 How to order • Numbering system 02/04 • Article numbers 02/06 Dimensions and weights • Metric Units [Threaded connection] 02/08 [Flanged connection] 02/09 • US Units [Threaded connection] 02/10 [Flanged connection] 02/11 Pressure temperature ratings • Metric Units + US Units 02/12 Order information – Spare parts 02/13 Available options 02/14 Approvals 02/15 Capacities • Steam, Air, Water [Metric Units + US Units] 02/16 Determination of coefficent 02/17 of discharge K dr /α w Application range 02/18 of conventional design and long version LWN 481.01-E 02/01
Page 1 and 2: Compact Performance Safety Relief V
Page 3 and 4: General Type 437 Orifice diameter d
Page 5 and 6: Contents Type 459 05/01 Materials
Page 7 and 8: General Information General Applica
Page 9 and 10: Valve finder General How to find th
Page 11 and 12: Valve selection General Valve size
Page 13 and 14: How to use General Sample Determina
Page 15 and 16: How to use General 7 Base of capaci
Page 17 and 18: Sour gas service (H 2 S) General No
Page 19 and 20: Type Type 437 Type 437 Packed knob
Page 21 and 22: Type 437 Available designs - materi
Page 23 and 24: Type 437 Type 437 4 5 6 Options Doc
Page 25 and 26: Type 437 How to order - Article num
Page 27 and 28: Type 437 Dimensions and weights - M
Page 29 and 30: Type 437 Dimensions and weights - U
Page 31 and 32: Type 437 Order information - Spare
Page 33 and 34: Type 437 Approvals Type 437 Approva
Page 35 and 36: Type 437 Capacities - Air Capacitie
Page 37: Type 437 Determination of coefficen
Page 43 and 44: Type 438 4 5 6 Options Documentatio
Page 45 and 46: Type 438 How to order - Article num
Page 51 and 52: Type 438 Order information - Spare
Page 53 and 54: Type 438 Approvals Approvals Actual
Page 55 and 56: Type 438 Determination of coefficen
Page 57 and 58: Type 439 Packed knob H4 Type 439 Sa
Page 63 and 64: Type 439 Pressure temperature ratin
Page 69 and 70: Type 439 Available Options Male thr
Page 71 and 72: Type 439 Capacities Capacities acco
Page 73 and 74: Accessories and Options Contents Ch
Page 75 and 76: Accessories and Options Caps and le
Page 77 and 78: Accessories and Options Available c
Page 79 and 80: Accessories and Options Sealing sur
Page 81 and 82: Accessories and Options Heating jac
Page 83 and 84: Type Type 459 Plain lever H3 459 Sa
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Type 459 How to order - Article num
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Type 459 Dimensions and weights - M
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Type 459 Dimensions and weights - U
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Type 459 Pressure temperature ratin
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Type 459 Order information - Spare
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Type 459 Approvals Europe Approvals
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Type 459 Capacities - US Units Capa
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Type 459 HDD Safety Relief Valves H
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Type 459 HDD Available designs - ma
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Type 459 HDD 4 5 6 Options Document
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Type 459 HDD How to order - Article
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Type 459 HDD Dimensions and weights
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Type 459 HDD Capacities - US Units
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Type Type 462 Plain lever H3 462 Sa
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Type 462 Available designs - materi
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Type 462 4 5 6 Options Documentatio
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Type 462 How to order - Article num
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Type 462 Dimensions and weights - M
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Type 462 Dimensions and weights - U
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Type 462 Pressure temperature ratin
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Type 462 Order information - Spare
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Type 462 Approvals Europe Approvals
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Type 462 Capacities - US Units Capa
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Type 462 HDD Safety Relief Valves H
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Type 462 HDD Available designs - ma
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Type 462 HDD 4 5 6 Options Document
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Type 462 HDD How to order - Article
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Type 462 HDD Order information - Sp
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Type 462 HDD Approvals Europe Appro
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Type 462 HDD Capacities - US Units
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Accessories and Options Contents Ch
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Accessories and Options Overview Op
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Accessories and Options Caps and le
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Accessories and Options Available c
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Accessories and Options Sealing sur
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Accessories and Options Heating jac
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Accessories and Options Balanced be
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Accessories and Options O-ring damp
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Accessories and Options Lift restri
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