A swing check valve allows forward flow and blocks the reverse flow. It provides a strong option for uni-directional homogenous flow applications.
The swing check valve’s disc and the rocker connect, allowing them to revolve at an angle around the pin shaft. When input pressure to the disc exceeds resistance pressure, fluid flows in the prescribed direction. While the valve opens, the disc separates from its seat and rotates around the pin to a fully open position.
When the flow rate drops the valve disc will rotate back to the closed position. This prevents backward fluid flow.
Series: C140
Size: 1″ to 10” (25 mm to 250 mm)
Material: ASTM A 216 WCB, ASTM A351 Gr CF8, ASTM A 351 Gr CF8M, ASTM A 217 Gr WC6, A 217 Gr WC9
Special Material: Duplex 4A, 5A, AB2, Inconel, Monel, CN7M
Seat & Disc: CS + 13% Cr, CA 15, AISI 410, AISI 304, 316, 304L, 316L
Gasket: P.T.F.E. Graphite Asbestos, SPW SS With Graphite Filled
Pressure Rating: ASME #150, #300, #600
End Connection: Raised Flanged, Butt Weld
Construction: Bolting Bonnet
Operation: Self Operated
Design Standard: API 6D,BS 1868,ASME B16.34
Pressure Testing: API 598
Face to Face: ANSI B 16.10 / DIN STD.
Flanged Drilling: ANSI 16.5 / DIN / IS STD.
Butt Weld: ANSI B 16.25
Quality Assurance: ISO 9001
NACE: MR 0103, MR 0175
Fugitive Emissions: ISO 15848-1, API 622
- Bolted Bonnet with spiral-wound gasket, Threaded and seal Welded Bonnet, or threaded and Pressure Seal Bonnet
- Bye Pass on Request
- Full port or Conventional Port
- 6” Larger With Eye Bolt
- Swing Type Disc
- They are often placed on the outlet side of a pump to protect the pump from backflow.
- Centrifugal pumps, the most common type of water pumps, are not self-priming, and therefore check valves are essential for keeping water in the pipes.
- Check valves are very often used in HVAC systems.
- Check valves are installed to make sure that the coolant does not flush back down.
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