DOCN cryogenic valves are mainly used for precise regulation and cut-off of ultra-low temperature media, working temperature can be as low as -196C, suitable for ethylene, liquefied natural gas, air separation and variable pressure adsorption oxygen generation and other low temperature devices. Each cryogenic valve produced by Dongchen is degreased when installed, and each part is deep-cooled before finishing to prevent cracks from occurring when the part is actually used. In addition, before leaving the factory, Dongchen will conduct pressure and leakage tests on the cryogenic valve under simulated cryogenic conditions in liquid nitrogen, with helium gas as the air-tightness testing medium.

Technical Data

Nominal diameter: NPS1/2”-NPS 24”(DN15-DN600)

Nominal pressure: ANSI150 -ANSI1500

Body material: A351 CF8/CF8M/CF3/CF3M

Interior material：316SS/316 LSS（STL）

Leakage level: ANSI B16.104 IV/V

Working temperature: -196C-+200C

Connection method: Flange, BW

Upper cover form: Cryogenic type

Filler material: PTFE, GLE of low leakage type

Fluid medium: liquefied nitrogen, oxygen, and argon