Cryogenic Check Valve

A Cryogenic Check Valve is an automatic backflow prevention valve specifically designed for ultra-low temperature operating conditions (typically ≤ -46°C, such as LNG, liquid oxygen, liquid nitrogen, etc.). Its core function is to prevent media backflow in cryogenic medium transportation systems, ensuring unidirectional flow and equipment safety. Through material selection and structural optimization, the valve maintains reliable opening and closing performance as well as structural integrity at extremely low temperatures. Key components such as the valve body and disc are made of austenitic stainless steel or cryogenic alloys and undergo deep cryogenic treatment to ensure low-temperature toughness. The sealing surfaces are typically hard-faced with stainless steel and wear-resistant alloys or use polymer soft seals to guarantee sealing performance in cryogenic environments. Structural Features of Cryogenic Check Valves:Lift-type or Swing-type Design: Adapts to different flow rates and installation orientations.Lightweight Disc and Low-resistance Spring: Ensures sensitive and reliable opening and closing at low temperatures.Anti-cold Bridge Structure: Minimizes heat transfer and prevents external frost formation.Cavity Pressure Relief Design: Avoids abnormal pressure buildup caused by vaporization of residual liquid. The cryogenic check valves produced by Kaiweixi Valve Group are widely used in LNG storage and transportation systems, air separation units, cryogenic pump outlets, and aerospace fuel systems.