How does a PVC swing check valve work?
Swing check valves utilize a disc inside the valve to allow or stop the flow of the piping system. As the fluid flows through in the correct direction, the pressure forces the disc to open and stay open. As the pressure decreases, the valve disc closes, stopping the flow of the fluid from reversing.
Does a swing check valve have to be horizontal?
The simple answer to that question is yes, swing check valves can be installed in both directions. But to be very clear, installing a swing check valve on a horizontal pipeline can actually look like the valve is vertical.
When would you use a swing check valve?
Swing check valves are ideal for high-volume, consistent-pressure fluid situations. They’re the most common valve used in wastewater treatment and water pumping.
Do PVC check valves restrict flow?
One, check valves are prone to jamming in the open position, thereby becoming an uncheck valve of sorts. Two, they are prone to jamming in the closed position, preventing water flow in any direction. And three, they can restrict water flow.
What is the difference between wafer check valve and swing check valve?
Because wafer check valves are flanged in place, there isn’t much room for the disc to open in the pipe line. That means flow is often restricted with a wafer check valve. Swing check valves on the other hand, have a molded body that creates room for the disc to swing open fully, thus allowing full flow.
Do swing check valves leak?
Swing check valves use a hinged swinging disc to block and control the movement of fluid in a system. As they are used to prevent the reverse flow of fluids or gases, any failure can lead to leakage, loss of pressure, contamination, overflow, and, in the most severe cases, complete system failure.
Can a swing check valve be installed upside down?
Check valves MUST be installed with the valve’s FLOW arrow pointing in the direction of the flow. In horizontal installations, the designated side must be positioned “up”. Do Not install Check Valve upside down.
Can you put a swing check valve vertically?
Swing check valves can be mounted in either vertical or horizontal position with upward flow or in any intermediate position. Flow must be by direction of arrow in body.
What is swing type check valve?
A swing check valve is mounted with a disc that swings on a hinge or shaft. The disc swings off the seat to allow forward flow and when the flow is stopped, the disc swings back onto the seat to block reverse flow. The weight of the disc and the return flow has an impact on the shut-off characteristics of the valve.