About Product:Butterfly check valve is to rely on the flow of the media itself and automatically open, close disc, used to prevent the media flow back valve, also known as the reverse valve, one-way valve, Check valve belongs to an automatic valve, its main function is to prevent the reverse flow of the medium, prevent the pump and drive motor reversal, And the leakage of the container medium. Check valves can also be 2 feed auxiliary systems, in which pressure may rise above the system pressure. Check valves can be means into swing Check valves (\" according to the center of gravity rotation), lift check valves (along the axis movement), butterfly check valves (along the center rotation).