In order to meet the needs of national defense construction and to meet the smooth shutdown of satellite launch platforms under emergency conditions, Chuan Kong successfully designed and manufactured the largest caliber spacer gas pneumatic hydrogen emergency shut-off valve for delivery. There are currently also being made of DN50 ~ DN150 spacer pneumatic pneumatic hydrogen emergency shut-off valves for use by the General Assembly Ministry of PLA for satellite launch pad and other key equipment, which will be delivered by the end of June. The successful manufacture and delivery of these high, refined and extreme cryogenic valves have brought an end to the history that such products must be imported and further improved the industrial chain of the company's cryogenic valves.