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How to install a foot valve?

Views: 17     Author: Site Editor     Publish Time: 2022-01-13      Origin: Site

The foot valve is installed at the inlet end of the pump to ensure that the inlet end of the pump is filled with liquid.

The foot valve is a lift check valve, which is installed at the bottom end of the suction pipe of the centrifugal pump, so it is called "foot valve". Before the pump starts, the valve flap is closed due to its own weight, which can fill the suction pipe above the foot valve with water. After the pump is started, the suction in the suction pipe lifts the valve flap of the bottom valve, so that the water flow continuously enters the pump. After the pump is stopped, the suction disappears and the foot valve closes by itself.

A foot valve is a special type of lift check valve that is installed on the suction end of the pump piping. Most pumps require water to be filled prior to being actuated to discharge the air in the suction pipe of the inner box of the pump casing. At this time, a check valve is required to prevent the loss of the injected liquid.

Pump casing and suction piping, either by manually pouring liquid to fill the pump, or by applying a vacuum to the pump casing to induce liquid into the piping and pump casing. In both cases, the foot valve prevents the charged liquid from directly flowing out or evacuating the air from the pump casing. Keep in mind that the suction system of the foot valve is a damper that results in a loss of suction pressure to the pump, and this damper must be taken into account when designing the piping and selecting the valve.


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