Dual Plate Check Valve

The dual Plate Check valve is a spring-loaded non-return valve. It’s basically a one-way valve and is generally used in pipelines to prevent backflow.

It’s made of a one-piece body, a pin at the centerline and two plates fixed by the pin and loaded with spring, it allows fluid to pass through in the flow direction and block the fluid when the flow return.

Compared with conventional swing check valves it can significantly reduce the weight and length and it results in saving cost and space of the piping system.
 
Compact Design
The weight is only around 20% of the equivalent swing check valve.

Swing Check Valve VS Dual Plate Check Valve
End Connections

Wafer End



Lug End



Flanged  End



Retainerless Body

The bosseal dual plate valve is a one-piece design without a hole through the body, there are no external pins to retain the disc/stem, so that no external leakage point, it's a good choice for critical service.




 
Independent Spring

The two plates are actuated by two separate high torsion springs and it ensures a quick closing, lower water hammer affection, longer working life and better sealing performance.
Optional Soft and Metal Seat

Metal Seat: STL (CoCr alloy) overlay on the body seat, suitable for high temperature
 
Soft Seat: Viton, EPDM, NBR, PTFE (not recommended)
 
Unique Slim Plate Design

The plate size and shape are well designed to have lightweight, good flow efficiency, low-pressure loss, fast operation and better sealing performance under low pressure.
Other Wafer Check Valve Types are Available

Single Plate Wafer Check Valve
Thin Type Wafer Check Valve
 
Titling Disc Wafer Check Valve
Piston Type (Lifting) Wafer Check Valve
   
Recommended Installation


Flow Coefficient/Pressure loss