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The swing arm connection between the swing check valve and the valve clack adopts a spherical connection structure, so that the valve clack has a certain degree of freedom within the range of 360 degrees, and there is an appropriate trace position compensation. All of the valve’s opening and closing parts are installed inside the valve body and do not penetrate the valve body except for the sealing gasket and sealing ring for the middle flange, there is no leakage point as a whole which prevents the possibility of valve leakage. The swing check valve adopts a built-in rocker swing structure. Installation and uses of swing check valve This type of valve should generally be installed horizontally in the pipeline, but it can also be installed vertically by keeping in mind that the disc cannot reach the stalling position where the disc stuck in an open position.ħ. The pressure drops and turbulence in these types of valves are very low. Swing check valves belong to the group of automatic valves, which are used mostly in pipelines where the medium flows in one direction and allow only the medium to flow in one direction to avoid accidents. As pressure reaches zero, the valve shuts fully to prevent backflow. A Swing Check Valve is desinged to prevent the medium in the pipeline from flowing back.