In the Swing Check Valve there is a movable part that blocks the flow of the fluid. It has a disc which swings on the hinge and allows the flow to go in forward direction and avoid reverse flow the liquid. The seating is arranged in either metal to metal or is a metal to disc connection. The composition disc is usually used in the locations where there is dirt or any other such particles having high viscosity flows and where noise should not be there. The Swing Check Valve allows full flow and closes automatically when there is a decrease in pressure. The valve has only two conditions one is full opened and other one is closed.
