Swing check valve is a type of butterfly check valve whose disc is movable to block the flow, swings on a hinge or trunnion, either onto the seat to block reverse flow or off the seat to forward flow. The seat opening cross-section may be perpendicular to the centerline between the two ports or at an angle. Although swing check valves can come in various sizes, large check valves are often swing check valves.
The check valve depends on gravity (weight of disc) and reverse flow. The pivot point of the swing check valve is outside the periphery of the disc, and the greater the head is, the greater the possibility is that the fluid will flow back through the valve before the disc can shut off. To effect complete shut off, the disc of a swing check valve can travel through a 90 angle arc to swing check valve seat.
China check valve manufacturer girl sax com provides swing check valve having different dimensions: cast iron/alloy steel/ductile iron/stainless steel, RTJ/flanged, 2 inch/32 inch, 125LB/150LB/300L, etc.
Other dimensions also can be available. If you have any questions, please feel free to contact us: [email protected].