The basic information of foot valve

Foot Valve by valve body, valve cover, valve, such as parts, gasket seal ring and foot valve disc with single and double disc and disc type.Foot Valve after the access to the pipeline, the liquid medium to enter the body from the bonnet direction, the pressure of the liquid on the disc, that allows the medium flows through the valve is opened, when the body within the medium pressure change or disappear when the disc is closed to prevent backflow medium.
Foot Valve, is actually a kind of check valve, to prevent the reverse water role.
Foot Valve according to the material can be divided into plastic foot valve and metal foot valve, also can be divided into ordinary foot valve and backwashing water foot valve.
Foot Valve is mainly used in processing of grout mechanical equipment such as pump, usually foot valve can be installed in the bottom of the suction pump water, to prevent the reverse flow of grout.
At present domestic brand of foot valve quality is generally poor, such as untight seal, the leakage problems, etc., this system is difficult to realize automatic control, each time need to straws in the water, very trouble.
Foot Valve on the valve cover is equipped with multiple inlet, with mesh, in order to reduce clutter inflows, reduce the blocking probability of bottom valve.Although foot valve screen mesh with anti clogging, foot valve is generally applicable clean medium, viscosity and particle through the large medium unfavorable use foot valve.

（source：http://www.kg-machinery.com/news/foot-valve.html）