Pioneer in valve industry
Introduction of check valve
Release time:
2024-04-07
Check valve, also known as one-way valve or check valve, its role is to prevent the backflow of media in the pipeline. Includes swing check valve and lift check valve. Swing check valves have a hinged mechanism and a door-like disc that rests freely on the inclined seat surface. In order to ensure that the valve can reach the appropriate position of the valve seat surface every time, the valve design in the hinge mechanism, so that the valve has enough swing space, and make the valve real, comprehensive contact with the valve seat. The valve can be made of all metal, or inlaid with leather, rubber, or synthetic covering, depending on the performance requirements. Swing check valve in the fully open condition, the fluid pressure is almost unimpeded, so the pressure drop through the valve is relatively small. The disc of the lift check valve is located on the valve seat sealing surface on the valve body. This valve in addition to the valve can be free to lift, the rest of the same as the cut-off valve, the fluid pressure to lift the valve from the valve seat sealing surface, the media backflow caused by the valve back to the valve seat, and cut off the flow. According to the conditions of use, the valve can be all-metal structure, can also be inlaid on the valve frame rubber pad or rubber ring form. Like the cut-off valve, the fluid through the lift check valve channel is narrow, so the pressure drop through the lift check valve is larger than the swing check valve, and the flow of the swing check valve is very limited.
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