- Low temperature impact test of valve material to ensure that the material will not brittle damage at low temperature.

- For low temperature check valves below -101℃. Valve parts are cryogenically treated before finishing.

- Valve internals are selected to avoid jamming, occlusions and bruising during frequent operation.

- Bolted bonnet; Swing type and lift type disc; Metal sealing surface.

- Connection between body and bonnet The body and bonnet of check valves are generally connected by stud + nut.

- Middle flange gasket check valve generally adopts stainless steel + flexible graphite wound gasket; Metal ring pads can also be used.

Low temperature carbon steel check valves generally use forged seats, seat sealing face spray welding customer specified alloy.