Ball Type Check Valve 

Philic Ball Type Check Valve Overview Philic ball type check valve build in a spherical ball. The full-ported valve seat is uniquely designed allowing the ball to seat leak-tight instead of getting wedge into valve seat. In vacuum or anti-flooding valve application, a "floating" ball is used. Due to its simple flow efficient, low flow resistance and virtually maintenance-free advantages,etc the valve is commonly specified and used in water pipelines. Ball Check Valves Ball check valves imbeds a ball sitting on the seat, which has only one pass-through hole. The ball has a larger diameter than that of the through-hole (seat). When the pressure behind the seat exceeds that above the ball, liquid is allowed to flow. Once the pressure above the ball exceeds the pressure below the seat, the ball returns to rest in the seat, forming a seal that prevents backflow. The ball moves up and down inside the valve depending on the flow and seals against the ma…