The cryogenic butterfly valve is mainly used in ethylene, liquefied natural gas devices, natural gas LPG and LNG storage tanks, petrochemical tail gas separation equipment, low-temperature storage tanks of liquid oxygen, liquid nitrogen, and carbon dioxide, and truck. The output liquid low-temperature medium, such as ethylene, liquid oxygen, liquid hydrogen, liquefied natural gas, liquefied petroleum products, etc., is not only flammable and explosive but also needs to be gasified when heating up. When gasified, the volume expands hundreds of times. The application of a cryogenic butterfly valve can control the temperature and prevent hidden dangers such as explosion and leakage.

Technical specification

Design & manufacturing standard as per ASME B16.34/API 6D/BS EN ISO 17292(BS5351)
Face-to-face standard as per ASME B16.10
Fanged ends standard as per ASME B16.5/ASME B 16.25/ASME B 16.11/ASME B 1.20.1
Testing & inspection standard as per API598/BS EN 12266(BS6755)
Fire-safe testing as per API 607/BS 6755 ISO/FDIS 10497

Product Range

Body material:

 LCC LCB CF8M CF8 CF3 CF3M

Size range(s):6″～48″
End Connection: RF, BW
Pressure rating: Class150 – Class300
Working temperature: -252℃ – +120℃
Operation:  worm gear, electric, etc

Cryogenic Treatment

Stainless steel is the main pressure-bearing part of ultra-low temperature material at room temperature in a suitable state. When the temperature drops to the point below the transformation point Ms, the part of the austenite will become a body-centered cubic lattice of martensite, the valve seal structure will have a certain deformation.

lower than valve operating temperature.

Cryogenic treatment time 2~6hours, 2~4 times, eliminating the material phase transformation and plastic deformation of the impact of ultra-low temperature valve to ensure sealing performance