Swing Type Check Valve

Swing check valve is mainly composed of valve body, valve cover, valve seat, valve disc, rocker, pin, bracket and other parts. The valve disc rotates around a pin located outside the valve seat. The back of the valve disc is fixedly installed on one end of the rocker through a connecting screw and nut, and the other end of the rocker is hingedly installed on the wall bracket of the valve body cavity. The medium pressure at the inlet end pushes the valve disc to rotate and open, and the medium pressure at the outlet end and the self-weight of the valve disc make the valve disc close.

Main Parameter Specification:

Design and Manufacture:Cast Steel Check Valve to BS 1868,ASME B16.34,API 6D
Inspection and Test:API598,API600 or API 6D
End Flange Dimension:ASME B16.5(for NPS≤24,ASME B 16.47 series B,API 605,ASME B16.47 A Series,MSS SP-44(for NPS>24)
BW end Dimension:ASME B16.25
Face to Face and End to End:ASME B16.10
Pressure-temperature ratings:ASME B16.34
Wall Thickness Dimension:API 600,BS 1868
Product Range
Body material: carbon steel, stainless steel, alloy steel,bronze
Nominal diameter:1/2"~48"(DN15~DN1200)
End Connection: RF,RTJ,BW
Pressure range: Class150~2500(PN16~PN420)
Working temperature:-196ºC~+560ºC

Design Standard

How to install a swing check valve?

Swing check valves can be installed horizontally or vertically. Before installing the swing check valve, you must ensure that the flow arrow is in the correct direction. If installed vertically, the flow arrow must point upward to allow liquid flowing through the pipe to flow upward and avoid gravity pulling it back and contaminating the water supply.

The following steps will guide you on how to install a swing check valve:

Step 1: Look inside the valve
Make sure there is nothing stuck inside the valve body. If a small object enters the swing check valve, it may cause the disc to become stuck, preventing all flow of water.

Step 2: Push the disc away from the seat surface and check its operation to make sure it can move freely.

Step 3: Make sure the flange ends do not have any burrs or edges that could prevent proper sealing.

Step 4: Install the valve in the flow direction according to the flow direction arrow, ensuring that there is a straight pipe section of 3 times the diameter upstream.

Step 5: If installed vertically, the flow direction must be upward; if installed horizontally, the valve cover must be facing upward.

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