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Type 437 Available Options Type 437 Male thread Female thread Flanged version Stellited sealing surface J25: Disc stellited L20: Base/inlet body Disc with inserted sealing plate J44: PTFE-FDA “A” J48: PCTFE “G” J49: VESPEL-SP1 “T” Heating jacket H29 Special material 2.4610 Hastelloy ® C4 2.4360 Monel ® 400 1.4462 Duplex Special material 2.4610 HASTELLOY C4 2.4360 MONEL 400 1.4462 DUPLEX Code XXXX Code YYYY Code ZZZZ Code XXXX Code YYYY Code ZZZZ 01/14 LWN 481.01-E
Type 437 Approvals Type 437 Approvals Actual Orifice diameter d 0 [mm] 6 10 Actual Orifice area A 0 [mm 2 ] 28,3 78,5 Actual Orifice diameter d 0 [inch] 0,236 0,394 Actual Orifice area A 0 [inch 2 ] 0,044 0,122 Europe Coefficient of discharge K dr DIN EN ISO 4126-1 Approval No. 0720201110008/0/21-1 S/G 0,72 0,50 L – 0,35 Germany Coefficient of discharge α w AD 2000-Merkblatt A2 Approval No. TÜV SV 980 United States S/G 0,72 0,50 L – 0,35 Coefficient of discharge K ASME Sec. VIII Approval No. – M 37213 Canada S/G – 0,509 Approval No. – M 37189 L – 0,370 Coefficient of discharge K CRN Approval No. OG0772.9C China CSBQTS Russia Approval No. S/G – 0,509 L – 0,370 Coefficient of discharge α w S/G 0,72 0,50 L – 0,35 Coefficient of discharge α w GGTN / Approval No. PPC 00-18458 GOSGOTECHNADZOR S/G 0,72 0,50 GOST R L – 0,35 Classification societies Homepage Bureau Veritas BV www.bureauveritas.com Det Norske Veritas DNV www.dnv.com Germanischer Lloyd GL www.gl-group.com Lloyd‘ s Register EMEA LREMEA www.lr.org Registro Italiano Navale RINA www.rina.org The valid certification number is changed with every reneval. A sample certificate including the valid certification number can be taken from the homepage of the classification societies. LWN 481.01-E 01/15
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: Type 437 Order information - Spare
Page 35 and 36: Type 437 Capacities - Air Capacitie
Page 37 and 38: Type 437 Determination of coefficen
Page 39 and 40: Type Type 438 Packed knob H4 Conven
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 61 and 62: Type 439 4 5 6 Options Documentatio
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
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Type Type 459 Plain lever H3 459 Sa
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Type 459 Available designs - materi
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Type 459 4 5 6 Options Documentatio
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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 Order information - Sp
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Type 459 HDD Approvals Europe Appro
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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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