New Cryogenic Check Valve Operates At Fluid Temperatures Down To −320˚f

Phil Black - PII Editor 08/10/2025

275 1 minute read

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The Lee Company is pleased to announce the release of the Cryogenic Check Valve – the first product in our extensive lineup to be qualified for operation at temperatures down to −320˚F. This milestone reinforces The Lee Company’s position as a global leader in precision fluid control and marks the start of active and ongoing testing at our in-house cryogenic test facilities.

While the standard acceptance testing is performed at room temperature as a cost and time-saving measure, qualification testing for this innovative check valve was performed with the valve submerged in liquid nitrogen. This testing confirmed leakage results of less than 10 SCCM of helium at −320˚F.

The Cryogenic Check Valve incorporates fitting ends per AS standards, making it easy to integrate into existing systems. The valve’s materials were carefully selected for their compatibility with hydrogen and other fluids used at cryogenic temperatures. In addition the valve’s adaptable construction supports material changes to suit a wide range of environments.

Key Features of the Cryogenic Check Valve:

• Temperature range: −320 °F to 275 °F
• Pressure rating: up to 5,000 psi
• Leakage: < 10 SCCM helium at −320 °F
• Lohm resistance: 85 Lohms (fully open) (Cv = 0.24)
• Fitting interfaces: AS4395E04 (inlet) & AS4395E06 (outlet)
• Materials: Nitronic 50, 316 CRES, A286 CRES, cobalt alloy, polyimide seat

This product is ideal for use in aerospace and other mission-critical systems that handle ultra-low temperature fluids such as satellite propulsion systems. Applications include cryogenic propulsion, thrust vector control, and thermal management loops using liquid hydrogen or oxygen as well as precision fluid control in life support and fuel management systems.

Find out more here.