Check valves are used where flow is needed only in one direction. It prevents reverse flow. The four basic types are – swing check, lift check, non-slam check and combined stop & check.
In the swing check valve, flow moves through the valve in approximately a straight line. The check mechanism of the design incorporates a disk which swings on a hinge.
In the lift check valve, flow moves through a changing course. They must be installed with pressure under the disk.
Size : 1/2” to 36”
Pressure Rating : 150 # to 2500 #
Materials : WCB, CF8M, CF8, CF3M, LCB, WC6, WC9
Pressure / Temperature Rating : ANSI B 16.34
Test(inspection) Standard : API 598
End Connection : Flanged, butt weld, socket weld
Design Standard : BS 1868