Check Valve

H42H and H42Y carbon steel vertical check valves can prevent medium backflow and serve as medium check valves. H42H vertical check valve is open when the medium Pressure at the inlet end is higher than that at the outlet end. Because the valve disc in the top opening check valve automatically opens under the Pressure of the medium at the inlet end of the pipeline. When the Pressure of the medium at the inlet end is lower than that at the outlet end, the spring pushes the valve disc to the valve seat to close the valve (Note: a spring is required for horizontal installation, and no spring is required for vertical pipeline installation. The valve disc will automatically close under its own weight and the Pressure of countercurrent medium)