21-25 July 2019
Connecticut Convention Center, Level 6
US/Eastern timezone

C2Po2A-11 [17]: Leak detection system for valves at 20 K with a G-M cryocooler

23 Jul 2019, 13:30
Level 6, Cryo Expo Exhibit Hall ()

Level 6, Cryo Expo Exhibit Hall

Poster Presentation C2Po2A - Test Facilities


Mr Lv Bingkun (Technical Institute of Physics and Chemistry,CAS)


Abstract. Cryogenic valve is widely used in cryogenic systems such as Aerospace propulsion systems and various cryostats. At low temperature, the valve is prone to strength decline, material brittleness and other problems, which easily lead to gas leakage and thus bring security risks. Cryogenic valves must be tested for leakage at low temperature in addition to normal temperature. In this study, a cryogenic leak detection system was established, which meets the test requirements at temperatures around 20K and pressures of 21MPa, and detects the internal and the external leakage of the valve. Compared with the traditional cryogenic leak detection system, this system has the following advantages: The G-M cryocooler was used as the cold source to get rid of the dependence on liquid hydrogen and enhanced the safety performance, meanwhile, this system has the capability of simultaneous testing of five valves and of quick replacement of the valves to save the test time. The heat exchanger structure, cooling time and heat transfer area were optimized.

Primary author

Mr Lv Bingkun (Technical Institute of Physics and Chemistry,CAS)


Dr Xu Dong (Technical Institute of Physics and Chemistry,CAS) Prof. Huang Rongjin Prof. Li Laifeng Mr Jia Peng Prof. Nishimura Arata

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