Rockwood Swendeman
Valves > Relief > Safety
Pressure Class
Max 400 psig
Shell - Investment Cast 316Stainless Steel; A,S,M,E SA-351, Base - Investment Cast 316Stainless Steel, A,S,M,E SA-351, Trim - 316Stainless Steel, A,S,M,E, SA-479, Spring - Stainless Steel 17-7 PH A,S,T,M,; A-313; Type 631
Temperature Range
-423°F to 400°F
Inlet - 1/2" - 1" Outlet - 3/4" - 1 1/4"
Manufacturing Standards
  • CGA S-1.2 and S-1.3., V-4301 (Cryogenic Non-Oxygen), V-4401 (Oxygen), ASME sec.VIII, API 527, AD-Merkblatt A2, CRN 0G0591.9

Product Description

Cryogenic Stainless Steel Safety Relief Valve

Product Features

Special Teflon® seat making bubble tight seals possible to over 90% of set pressures per spec API 527- not applicable to steam, Adjustable blowdown ring, Cleaned and packaged for use in O2 service in compliance with the CGA specification G-4.1, 4WPI, SW70003, ES.660.503, GS-38, GS-40, Electropolishing of base and proper assembly for high purity and electronic applications


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