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| Single disk check valve animation. |
According to
Wikipedia, "Check valves are used in many fluid systems such as those in chemical and power plants, and in many other industrial processes."
As shown in the animation to the left, the single disc (swing)
check valve use the directional flow to push open a swinging disk. As long as flow continues, the disk stays raised. But as flow stops, gravity allows the disk to re-seat itself and any reverse flow is prevented by the closed disk. As reverse flow pressure increases, the swing check valves seating increases as well.
Single disc check valves also use springs, levers and/or weights mounted on the valve to allow for
better control of surge and to
prevent the valve from slamming closed. These assemblies are used to vary the valve’s closing operation in order to
reduce the severity of the closing water hammer.
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External spring, external spring & lever, and external spring, level & weight designs (left to right).
Courtesy of Champion Valve. |
For more information on any industrial check valve, contact
Piping Specialties, Inc. by visiting
https://psi-team.com or calling
800-223-1468.
