محصولات شرکت فولاد خیام > شیرآلات > Check Valves

Check Valves

Swing Check Valves

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 hinge 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.


Cast Steel Swing Check Valves


Normative reference: Check Valves
API 6D Pipeline Valves
BS 1868 Specification for Steel Check Valves (Flanged and Butt-Welding Ends) 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 B16.47 Series A Large Diameter Steel Flanges: NPS 26 Through NPS 60 Metric/Inch Standard
ASME B16.25 Buttwelding Ends
ASME B16.10 Face to Face and End to End Dimensions of Valves
MSS SP-25 Standard Marking System for Valves, Fittings, Flanges and Unions

Size available:
NPS 2 to NPS 24 (DN50 to DN600)

Pressure rating available:
Class 150 to Class 2500

Forged Steel Swing Check Valves


Specifications:
Normative Reference: Check Valves
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 B1.10.1 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 through NPS 4
Pressure rating available:
Class 150 through Class 2500