- Product features:
According to the standard requirements, ball valves with temperatures below -50℃ are generally designed with a long neck structure to increase the temperature of the packing and ensure the reliable sealing of the valve stem packing. The neck length is generally designed according to the standard requirements. If the user has special requirements, it can also be designed according to the valve suitable for low temperature media. When the valve is in the closed position, the low temperature liquid medium retained in the valve cavity will expand rapidly due to gasification when the temperature rises, resulting in abnormal increase in the pressure in the valve cavity. In severe cases, it will cause accidents such as valve rupture. Our company’s ball valve has an automatic pressure relief function in the middle cavity. When the pressure in the middle cavity increases abnormally, the medium in the middle cavity can rely on its own force to push the valve seat and automatically relieve pressure, thereby ensuring the safety of the valve. According to the contract requirements, low temperature tests can be carried out to test the operating torque, sealing performance and other indicators of the door at low temperatures. The valve components are treated with low temperature to ensure the stability of the shape and size of the components at low temperatures.
- Product standards: BS 6364 low temperature valves, ASME B 16.34 flange end, threaded end and welding end valves, SHELL SPE 77/200 low temperature and ultra-low temperature valves, GB/T 24925 low temperature valve technical conditions.
- Nominal pressure: PN16-PN100 (150LB-1500LB), JIS 10K-JIS 20K
- Nominal diameter:DN15 (1/2″)-DN300 (12″)
- Body material: ASTM A351 CF8/ASTMA351 CF8M/ASTM A351 CF3/ASTM A351 CF3M
- Operating temperature: -196℃~-29℃
- Applicable media: liquid helium, liquid hydrogen, liquid ammonia, liquid argon, liquid oxygen, liquid methane, liquid carbon dioxide, liquefied natural gas, etc.
- Connection method: flange connection, clamp connection and welding connection, etc.
- Drive mode: The drive mode of the cryogenic ball valve is manual, worm gear drive, pneumatic or electric