Class - Model 150 -Forged Steel Swing Check Valve
A swing check valve consists of a flap or disc which hangs down in the flow path. With flow in the forwards direction, the pressure of the fluid forces the disc to swing upwards, allowing flow through the valve. Reverse flow will cause the disc to shut against the seat and stop the fluid going back down the pipe. In the absence of flow, the weight of the flap is responsible for the closure of the valve.
Normative reference
API 602 Steel Gate, Globe and Check Valves for Sizes DN 100 and Smaller for the Petroleum and Natural Gas Industries
BS 5352 Specification for Steel Wedge Gate, Globe and Check Valves 50 mm and Smaller for the Petroleum, Petrochemical and Allied Industries
ASME B16.34 Valves Flanged, Threaded and Welding Ends
ASME B16.5 Pipe Flanges and Flanged Fittings: NPS 1/2 through 24
ASME B16.25 Buttwelding Ends ASME B16.10 Face to Face and End to End Dimensions of Valves
ASME B1.20.1 Pipe Threads, General Purpose (inch)
ASME B16.11 Forged Steel Fittings, Socket-Welding and Threaded
MSS SP-25 Standard Marking System for Valves, Fittings, Flanges and Unions
Size available
NPS 1/2 to NPS 4 (DN15 to DN100)
Pressure rating available
Class 150 to Class 2500