New cryogenic check valve operates at fluid temperatures down to -320degF

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 its 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 check valve was performed with the valve submerged in liquid nitrogen. This testing confirmed leakage results of less than 10 SCCM of helium at -320degF.

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 include: temperature range from -320degF to 275degF; pressure rating up to 5000psi; leakage xtagstartz10SCCM helium at -320degF; 85 Lohms resistance (fully open) (Cv = 0.24); and AS4395E04 (inlet) and AS4395E06 (outlet) fitting interfaces. The valve is constructed from Nitronic 50, 316 CRES, A286 CRES, cobalt alloy, polyimide seat.