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Type 438 How to order – Numbering system Type 438 1 2 3 Article Number Set Pressure Connections 1 1 2 3 4 438 3 . 286 2 Type 438 Please state unit (in gauge)! Please do not exceed pressure range mentioned in the spring charts. Please refer to table “Availabe Connections” on pages 04/04 and 04/05. Please state one option code for each, inlet and outlet. Types of sealing Soft seal Soft seal material NBR Buna-N ® EPDM Buna-EP ® CR Neoprene ® FKM Viton ® FFKM Kalrez ® 6375 2 Material code Code Body material 3 1.4104 (430) 4 1.4404 (316L) 3 4 Valve code Identifies valve size, body material and orifice, refer to page 02/07 and following. Code for lifting device Code Lifting device 2 Screwed cap H2 3 Pull button H3 4 Packed knob H4 4383.2862 12 bar g V55 V65 Article No. Set Pressure Connections 02/04 LWN 481.01-E
Type 438 4 5 6 Options Documentation Code and Medium Type 438 Type 438 Option code Please select requested documentation: 1 2 • Base / Inlet body 1.4404 (Type 4383 only) L18 • Soft seal material NBR “N” J30 CR “K” J21 EPDM “D” J22 FKM “L” J23 FFKM “C” J20 • Heating jacket H29 Inspections, tests: Option code DIN EN 10204-3.2: TÜV-Nord Certificate for test pressure M33 LESER Certificate for Global Application H03 - Inspection certificate 3.1 acc. to DIN EN 10204 - Declaration of conformity acc. to PED 97/23/EC Material test certificate: DIN EN 10204-3.1 Part Option code Base / Inlet body H01 Outlet body L34 Cap / lever cover L31 Disc L23 1 2 2 . 0 Code 1. ASME Section VIII 2. CE / VdTUEV 3. ASME Section VIII + CE / VdTUEV Medium .1 Gases .2 Liquids .3 Steam .0 Steam / Gases / Liquids (valid only for CE / VdTUEV) J23 H01 L23 2.0 Options Documentation Code and Medium LWN 481.01-E 02/05
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
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Page 39 and 40: Type Type 438 Packed knob H4 Conven
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Type 459 HDD Safety Relief Valves H
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Type Type 462 Plain lever H3 462 Sa
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Accessories and Options Contents Ch
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