Retainless Wafer Type Dual Plate Swing Check Valve

Check valve belongs to automatic valve category, which is mainly used in one-way flow pipe of medium. Only the medium is allowed to flow in one direction to prevent accidents. Usually, the fluid opens the valve disc under pressure and flows from the inlet side to the outlet side.

Product Details

Check valve, also known as  non-return valve, its function is to prevent media backflow in the pipeline. The bottom valve of the pump suction close also belongs to the check valve category. The opening and closing parts are opened or closed by the flow and force of the medium to prevent the backflow of the medium from being called a check valve.


It is light in weight, small in volume, easy to install between flanges, and consists of two semicircular springs and plate surfaces inside the valve. The valve plate is closed by spring deformation fixed on the valve body with a pin, and the fluid pressure makes the deformation of the open spring very fast, which can protect the pipe from the damage of the water hammer.

Main Parameter Specification:

Inspection and test:  API598, JB/T9092;

Design and manufacture:  API594, API 6D, JB/TB8937;

Face to face and end to end:  API594, API6D, DIN3202, JB/T8937;

Pressure-temperature rating:  ASME B16.34, DIN2410, GB/T9124, HG20625, SH3406, JB/T74;

Pipe flange: JB/T74-90, JB/T9112-9124, HG20592-20635, SH3406, ASME B16.5, GB/T13402, API605, ASME B16.47.

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