Safety valves · Marshall

MC-A Cryogenic relief valve

Marshall relief valve for LNG, liquid oxygen, nitrogen and argon down to −196 °C.

For cryogenic pipelines and vessels. Preset and glue-locked at the factory, cleaned to CGA G-4.1 for oxygen service and 100% factory tested.

Specifications

Set / range	75–500 psi (max. inlet 600 psi)
Temperature	−196 to 74 °C
Sizes	¼″, ⅜″, ½″ NPT / PT
Media	LNG, LO₂, LN₂, LAr, non-corrosive gas
Materials	Brass C3600, SUS302/304 spring, PTFE seal

Made and tested by Hopeet in Taiwan. Every valve is set and leak-tested before it ships, and its test report can be looked up by serial number.