CHECK VALVE

The check valve is a kind of valve whose opening and closing parts are circular disc and act by its own weight and medium pressure to block medium reverse flow. Is An automatic valve, also known as check valve, one-way Valve, backflow valve or isolation valve. Disc movement is divided into lifting and swing-type. Lift check valves are similar in structure to globe valves except for the stem that drives the disc. The medium flows in from the lower side of the inlet and out from the upper side of the outlet. The valve is opened when the inlet pressure is greater than the combined weight of the disc and its flow resistance. Conversely, when the medium is reversed, the valve is closed.