Speaker
Description
Cryogenic valves built into vacuum isolated coldboxes have to meet high requirements when it comes to tightness to vacuum, tightness to ambient, seat tightness or operational behavior. Since cryogenic tests are cost and time expensive, testing of valves during the manufacturing process is usually done at room temperature. Cryogenic tests however are sometimes necessary due to specific customer requirements or in form of a type test during the development and qualification process. Especially safety relevant cryogenic valves have to reach the highest operating reliability and should thus be tested under conditions as close as possible to the real operating conditions. This poster explains the different tests that were executed during the development, qualification and manufacturing process of cryogenic safety valves. It focuses in detail on the cold tests that were performed on the valves with cryogenic fluids and at cryogenic conditions.
