Check valve also known as one-way valve or check valve, and its role is to prevent the media pipeline back. Suction valve clearance also is the end of check valve type. Hoist pieces on media and mobile forces opened or closed to prevent the backflow valve media called check valve. Check valve is automatic valves, mainly for the one-way flow of media channels, the media is only allowed to flow in one direction.
to prevent an accident from happening. By the check valve structure, it is divided into movements valve Kai Xuan butterfly valve and check valve three. Valve movements can be divided into two horizontal and vertical. Kai rotary valve is divided into single_lobe-, double - and multi-jaw flap-three. Butterfly valve for the seamless, over several check valve connecting thread form can be divided into connectivity, and welding flange connecting three. Check valve installation should pay attention to the following things top : 1, the pipeline will not withstand the weight of so check valve, large check valve should be independent of the support, from the purview of the Department of the pressure. 2, the installation of media attention in the direction of flow and the valve should be under the direction of the arrow unanimous vote. 3, vertical take-off and landing flap valve should be installed in the vertical pipe. 4, elevating the level of flap valve should be installed in horizontal pipeline.
to prevent an accident from happening. By the check valve structure, it is divided into movements valve Kai Xuan butterfly valve and check valve three. Valve movements can be divided into two horizontal and vertical. Kai rotary valve is divided into single_lobe-, double - and multi-jaw flap-three. Butterfly valve for the seamless, over several check valve connecting thread form can be divided into connectivity, and welding flange connecting three. Check valve installation should pay attention to the following things top : 1, the pipeline will not withstand the weight of so check valve, large check valve should be independent of the support, from the purview of the Department of the pressure. 2, the installation of media attention in the direction of flow and the valve should be under the direction of the arrow unanimous vote. 3, vertical take-off and landing flap valve should be installed in the vertical pipe. 4, elevating the level of flap valve should be installed in horizontal pipeline. 
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