Check valves seem to be simple, passive elements. In connection with cryogenics, however, their production is becoming very demanding.
In a cryogenic system, check valves are used within the vacuum insulation without a possibility to access them. They are therefore mounted in the beginning and must operate for 20 or 30 years without requiring any maintenance.
Smooth and noiseless opening in one direction with a shut-off in the opposite direction as well as the sealing requirement for helium must be implemented in a component which is not subject to wear.
In addition to a complete series of cryogenic check valves, WEKA also offers check valves with an extremely low response pressure for gas recovery systems as well as tailor-made solutions for the high-pressure area.