A wafer check valve is a type of mechanical valve that allows for one-way flow control in a piping system. It is named "wafer" due to its compact and lightweight design, resembling a wafer.

The wafer check valve operates by utilizing a disc that swings or pivots on a hinge to allow or prevent the flow of fluid. When the fluid flows in the desired direction, the pressure pushes the disc open, allowing the fluid to pass through the valve. However, when there is a reversal in the flow or an increase in backpressure, the disc swings back into a closed position, effectively blocking the backflow.

One of the key advantages of a wafer check valve is its space-saving design. It is installed between two flanges in the pipeline without the need for additional space or support. This makes it an ideal choice for applications where space is limited or weight needs to be minimized.

Wafer check valves are widely used in industries such as water treatment, HVAC systems, and food processing. They are suitable for both horizontal and vertical installations and can handle a wide range of fluid types and pressures. These valves are available in various materials, including stainless steel, cast iron, and PVC, to meet specific requirements for corrosion resistance and compatibility.

In summary, wafer check valves provide efficient and reliable one-way flow control in piping systems. Their compact design, easy installation, and versatility make them a popular choice across different industries. Whether it's for industrial processes or commercial applications, wafer check valves offer effective backflow prevention and ensure the smooth operation of fluid systems.