The Foot valve consists of valve evaluation, disc, bonnet, bushing, sealing ring and other parts. See the water from the water source in the figure below from the bonnet to the valve body. Under the action of fluid pressure, the valve disc opens water.
When the pressure in the outlet pipe closes the valve disc rapidly after stop, the liquid will not be poured back to the water source, which plays the role of unblocked pumping and saving water energy loss.
- Check valves should be installed on equipment, installations and pipes to prevent medium backflow.
- Check valves are generally suitable for cleaning media, not for media containing solid particles and high viscosity.
- Vertical lift check valves should be generally used in horizontal pipelines with nominal diameter of 50mm.