Cryogenic valves, mainly used for ethylene, liquefied natural gas (LNG) plant, air separation equipment, oil chemical tail gas separation equipment, liquid oxygen, liquid nitrogen, liquid argon, carbon dioxide cryogenic storage tank and tank lorry, psa oxygen generating device, such as the main species have low temperature ball valve, cryogenic valve, etc. Cryogenic valves from its applicable temperature - 46 ℃ -- 196 ℃, and cryogenic - 273 degrees. Medium are liquefied gas, heat up the volume expansion feature, so to the requirement of the valve body material is very high, once has the unqualified products, it is possible to cause the body burst the malignant accident. Low temperature control valve on the cover of the packing, in the case of low temperature will freeze, constantly switch, packing will be torn with ice, causing leakage, so I need higher on the cover, making low temperature medium in reaching the stuffing box, has been the surrounding air heating, will not be freezing, so to eliminate leakage.

Cryogenic valves of 304 stainless steel material mainly, (20 - in - 46 ℃, can choose to LCB low temperature carbon steel, in order to reduce the use cost), packing ptfe, because of ptfe has excellent resistance to cold flow properties, so widely used in cryogenic valves. Low temperature regulator, basically have pneumatic control valve and the electric temperature regulator of low temperature and liquid nitrogen system is used in the factory, and air separation system is widely used, has a simple to use, high control precision, long life and other characteristics, the factory needs after low temperature test, meet the requirements of the operating conditions on site.