If you want to prevent reverse flow in the piping and plumbing system, then check valves are your true calling. Also known as the non-return valve (NRV), these valves can be classified into tilting disk, piston, swing, stop and butterfly.

Now, the swing type check valves come in y-pattern designs and straight body designs. In these valves, the disc is suspended from the body of the valve with the help of a hinge pin and seals against the seat. Interestingly, this hinge opens to allow the fluid to flow in and then closes to prevent any kind of reverse flow.

The swing check valves come in different shapes and sizes, which help the customers, too, to suit the specific application type.

From wastewater treatment, power plants to firefighting and sewage systems, swing check valves have multiple functionalities. In fact, these valves are commonly used in the washrooms especially the toilet tank to block the reverse flow.

So, how does a swing type check valve work? Before that, let’s understand the composition of a swing check valve. It comprises a valve body, a disc and a bonnet that is attached to the hinge. The disc moves away from the seat of the valve to allow the flow of the liquid in the forward direction and then returns to the valve-seat to prevent backflow.

The pressure of the fluid or gas passing through the system will automatically open the valve, whereas any kind of reverse flow will shut down the valve.

The swing check valves are completely closed when the flow of the liquid reaches zero in order to prevent any reverse flow. In this case, the pressure and turbulence drop inside the valve are extremely low.

Easy to install, swing type check valves can be installed in both vertical and horizontal positions. However, they are not really appropriate for pulsating flow.

Swing check valves are best choices for high and consistent-pressure fluid situations. So, they will be most handy in the wastewater treatment and water pumping systems. Power plants also see a considerable use of swing check valves. Since they are cost-effective and easy to maintain, and do not need any external power source, they are ideal choices for horizontal piping systems.

The swing type check valves offered by Dutco Tennant LLC — the biggest industrial solution provider in the Middle East and GCC region — are high on quality and easy on maintenance. If you are in the Middle East and require valves for wastewater or plumbing solutions, there’s only Dutco Tennant LLC to contact.