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Type 438 Pressure temperature ratings Type 438 Metric Units Conventional design Long version Actual Orifice diameter d 0 [mm] 10 10 Actual Orifice Area A 0 [mm 2 ] 78,5 78,5 Body material: 1.4104 (430) Base / Connection size 3 / 8 " 1 / 2 " 3 / 4 " 1" 3 / 8 " 1 / 2 " 3 / 4 " 1" Inlet Body Pressure rating PN 320 PN 320 Outlet body Pressure rating PN 160 PN 160 Minimum set pressure Maximum set pressure p [bar g ] S/G/L 5 93 p [bar g ] S/G/L 10 only H3 93 Temperature min [°C ] -10 -10 acc. to DIN EN max [°C ] +150 +150 180 Temperature min [°C ] -29 -29 acc. to ASME max [°C ] +150 +150 Body material: 1.4404 (316L) Base / Connection size 3 / 8 " 1 / 2 " 3 / 4 " 1" 3 / 8 " 1 / 2 " 3 / 4 " 1" Inlet Body Pressure rating PN 320 PN 320 Outlet body Pressure rating PN 160 PN 160 Minimum set pressure p [bar g ] S/G/L 5 68 Maximum p [bar g ] S/G/L 10 only H3 set pressure 68 180 Temperature min [°C ] -45 -45 acc. to DIN EN max [°C ] +150 +150 Temperature min [°C ] -268 -268 acc. to ASME max [°C ] +150 +150 US Units Standard Long version Actual Orifice diameter d0 [inch] 0,394 0,394 Actual Orifice area A0 [inch 2 ] 0,122 0,122 Body material: 1.4104 (430) Base / Inlet Body Minimum set pressure Connection size 3 / 8 " 1 / 2 " 3 / 4 " 1" 3 / 8 " 1 / 2 " 3 / 4 " 1" p [psig] S/G/L 72,5 1349 Maximum p [psig] S/G/L 145 only H3 set pressure 1349 2611 Temperature min [°F ] +14 +14 acc. to DIN EN max [°F ] +302 +302 Temperature min [°F ] -20 -20 acc. to ASME max [°F ] +302 +302 Body material: 1.4404 (316L) Base / Inlet Body Minimum set pressure Connection size 3 / 8 " 1 / 2 " 3 / 4 " 1" 3 / 8 " 1 / 2 " 3 / 4 " 1" p [psig] S/G/L 72,5 986 Maximum p [psig] S/G/L 145 only H3 set pressure 986 2611 Temperature min [°F ] -49 -49 acc. to DIN EN max [°F ] +302 +302 Temperature min [°F ] -450 -450 acc. to ASME max [°F ] +302 +302 The temperature is limited by soft seal material. The stated values are valid for EPDM. 02/12 LWN 481.01-E
Type 438 Order information – Spare parts Spare parts Actual Orifice diameter d 0 [mm] 10 Actual Orifice area A 0 [mm 2 ] 78,5 Actual Orifice diameter d 0 [inch] 0,394 Actual Orifice area A 0 [inch 2 ] 0,122 Body (Item 1): Male thread Material-No. / Art.-No. Connection Size 3 / 8 " 1 / 2 " 3 / 4 " 1" DIN ISO 228-1 G 1.4104 136.5339.9000 136.4939.9000 136.5439.9000 136.6839.9000 316L 136.5349.9000 136.4949.9000 136.5449.9000 136.6849.9000 ISO 7-1/BS 21 R 316L – 136.4949.9220 136.5449.9220 136.6849.9220 ANSI/ASME NPT B1.20.1 316L – 136.4949.9204 136.5449.9204 136.6849.9204 Type 438 Body (Item 1): Female thread Material-No. / Art.-No. Connection Size 3 / 8 " 1 / 2 " 3 / 4 " 1" DIN ISO 228-1 G 316L – 136.4949.9210 136.5449.9210 136.6849.9210 ISO 7-1/BS 21 Rc 316L – 136.4949.9222 136.5449.9222 136.6849.9222 ANSI/ASME NPT B1.20.1 316L – 136.4949.9211 136.5449.9211 136.6849.9211 Body (Item 1): Flange design Material-No. / Art.-No. DN 15 / PN 40 – 400 316L 136.4949.9208 NPS 1 / 2 " CL 150 316L 136.4949.9202 CL 300 - 2500 316L 136.4949.9208 DN 20 / PN 40 – 160 316L 136.5449.9208 NPS 3 / 4 " CL 150 – 2500 316L 136.5449.9208 DN 25 / PN 40 – 400 316L 136.6449.9208 NPS 1" CL 150 316L 136.6849.9202 CL 150 – 2500 316L 136.6449.9208 Disc with O-ring (Item 7) Material-No. / Art.-No. Disc NBR “N” 200.8349.9781 O-ring (Item 7.4) CR “K” 200.8349.9751 EPDM “D” 200.8349.9741 FKM “L” 200.8349.9771 FFKM “C” 200.8349.9791 Material-No. / Art.-No. O-ring NBR “N” 502.0107.2681 Pin (Item 57) CR “K” 502.0107.2651 EPDM “D” 502.0107.2641 FKM “L” 502.0107.2671 FFKM “C” 502.0107.2691 Material-No. / Art.-No. Pin 1.4310 480.0305.0000 Ball (Item 61) Material-No. / Art.-No. Ball Ball Ø [mm] 6 1.4401 510.0104.0000 LWN 481.01-E 02/13
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 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 49: Type 438 Dimensions and weights - U
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
Page 95 and 96: Type 459 Pressure temperature ratin
Page 97 and 98: Type 459 Order information - Spare
Page 99 and 100: 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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