H42 Type American Standard Vertical Check Valve

H42 Type American Standard Vertical Check Valve

H42 vertical check valve is designed and manufactured in strict accordance with API6D standard. This series of valves are normally closed. Due to the pressure of the medium at the inlet end of the pipeline, the valve overcomes the spring resistance to open. When the medium pressure at the inlet end is lower than that at the outlet end, the spring pushes the valve core to the valve seat to close the valve and prevent the reverse flow of medium, so it plays a check role. H42n vertical check valve can be installed vertically or horizontally because the valve core is supported by spring. It is widely used in pipelines under various working conditions in petroleum, chemical, pharmaceutical and power industries.