A21F Safety Valve, A21F Spring Micro-Opening External Thread Safety Valve, A21F-64 A21F-100 A21F-64P A21F-100P PTFE Soft Seal High Pressure Chemical Tank Gas Liquid Relief Valve

**A21F safety valve** is spring micro-opening external thread safety valve. **A21F safety valve** without wrench, F stands for PTFE soft seal, good sealing performance for gas and liquid medium. A21F-64 PN64, A21F-100 PN100, WCB carbon steel body; suffix P of A21F-64P and A21F-100P means 304 stainless steel body for corrosive medium. **A21F safety valve** suitable for compressed air, ammonia, petroleum gas, water and light chemical fluid, max working temperature ≤200℃. When pressure inside chemical high-pressure tank or high-pressure process pipeline exceeds set pressure, A21F safety valve opens automatically for pressure relief and closes automatically after pressure drop to protect high-pressure pressure equipment. **A21F safety valve** widely used for chemical high-pressure vessel, gas buffer tank, oil & gas equipment and high-pressure process pipeline. A21F safety valve complies with GB/T12243, GB, JIS, ASME standards, custom A21F set pressure available.