CRV - Cryogenic Relief Valve

Intended as a safety device for protecting piping and system sections against excessive pressure, e.g. due to thermal expansion in cryogenic systems.

Suitable for air gases, oxygen service and cryogenic liquefied gases subject to correct sizing and media compatibility.

Set pressure range: 0.7 to 51.7 bar.

Permissible operating temperature: -196 °C to +176 °C, depending on seal material.

Product overview: Cryogenic brass safety relief valve, 1/4", 3/8" and 1/2" NPT, set pressure range 0.7 to 51.7 bar, CE marking in accordance with PED 2014/68/EU Category IV, Modules B and D (standard), CRVP (0.69 to 24 bar) also available in accordance with R110 and TPED 2010/35/EU.

Function: Spring-loaded safety relief valve for overpressure protection in cryogenic systems. The Dirt Guard design helps protect the seating area from particulate contamination.

Media: Suitable for air gases, oxygen service and cryogenic liquefied gases subject to correct sizing and media compatibility.

Factory setting / testing: Factory preset, 100% tested for leakage, crack pressure and reseat performance; set pressure secured against adjustment. Field adjustment of the relief pressure is not intended.

Oxygen service: Cleaned and packaged for oxygen service as standard in accordance with CGA G-4.1.

Seals: Fluorosilicone for set pressures 0.7 to3.4 bar; PCTFE for set pressures 3.5 to 51.7 bar.

Permissible operating temperature: -196 °C to +176 °C, depending on seal material. Fluorosilicone: -65 °C to +176 °C; PCTFE: -196 °C to +74 °C.

Inlet: 1/4", 3/8" or 1/2" NPT male thread.

Outlet: Vent to atmosphere, deflector cap for directing exhausted gas, or pipe-away connection with 1/4", 3/8" or 1/2" NPT/BSPT female thread, depending on configuration.

Available special versions / options: Integral bleed valve version CRB for safe inlet-pressure venting; tamper-proof ring; pipe-away versions depending on configuration.