Reveal the mystery of check valve structure for you

Bolted bonnet, swing and elevating disc metal sealing surface. Body and bonnet joint form using bolted bonnet; Using the pressure sealed cover. Have a check valve is made of stainless steel valve cover gasket form graphite winding gasket; Check valves are available in stainless steel graphite winding gasket can also use a metal ring gasket; Check valve can be used metal ring gasket, the check valve adopts the pressure seal metal ring. Carbon steel check valve seat usually use forged steel material, valve seat sealing surface spray welding carbide can according to customer requirements, NPS≤ 10 'check valve adopt separate thread screw-plug seat, if users need to weld the seat structure are available; NPS≥ Globe valve adopts welded seat structure; Monolithic or commonly used stainless steel check valve seat in the cemented carbide welding processing directly after the seat on the body. If the user requirements, stainless steel check valve seat can also adopt separate thread screw-plug and welded-in seat structure. Structure characteristics of the cast steel swing check valve, check valve design of large caliber has rings, convenient operation. Bolted bonnet, the flange gasket type can undertake choosing according to difference of stress level; Check valve can be used pressure tight seal structure. Disc spacing device, prevent disc open position is too high to be shut down. Solid pin shaft installation precision, high strength, to ensure the use performance and service life of the valve. Rocker has enough strength, close enough freedom to facilitate the disc to close. Disc has sufficient strength and rigidity, clapper sealing surfaces according to user requirements surfacing welding metallic materials or non-metallic materials.