Many users have such a trouble when using corrosion-resistant self-priming pumps. Do you need to install a foot valve at the bottom of the pipeline when using it? First, let's introduce how the corrosion-resistant self-priming pump works. The corrosion-resistant self-priming pump is: the pump is filled with liquid before the pump is started, and there is no need to fill it. After startup, the impeller rotates at a high speed to discharge the original liquid in the pump to the gas-water separation chamber at the outlet. At this time, the inlet of the pump forms a vacuum so that the air in the suction pipe enters the pump. On the other hand, it is discharged by the impeller to the gas-water separation chamber. The water in the chamber flows back to the suction port of the impeller because there is no continuous supply of liquid, and mixes with the air just sucked in to form a gas-water mixture. The gas-water mixture passes through the impeller and is discharged to the gas-water separation chamber, where the gas will be discharged. Dewatering will also return to the pump cavity, and repeat this process until the air is exhausted and water is sucked in.
The role of the anti-corrosion self-priming pump bottom valve is to ensure the one-way flow of the liquid in the suction pipe, so that the pump can work normally when the centrifugal pump stops working, so that the liquid cannot return to the pool, and ensure that the suction pipe is filled with liquid to facilitate the start of the centrifugal pump.
(1) Does the corrosion-resistant self-priming pump need a foot valve?
Generally speaking, there is no need to install a bottom valve, because the inlet of the corrosion-resistant self-priming pump has its own check valve. After the corrosion-resistant self-priming pump is stopped, the liquid in the pump cavity cannot return to the original It is stored in the pump cavity, so there is no need to fill the liquid for the second use, but it does not mean that the corrosion-resistant self-priming pump cannot be equipped with a bottom valve. The effect will be better after the bottom valve is installed. Because if the one-way valve is damaged sometimes, there is a bottom valve as a guarantee, no idling will occur, and the installation of the bottom valve will effectively ensure the effective suction stroke of the pump!
(2) Is the corrosion-resistant self-priming pump equipped with a foot valve?
If the bottom valve is installed, the effect will be better, because if the one-way valve is damaged sometimes, there is a bottom valve as a guarantee, no idling will occur, and the installation of the bottom valve will effectively ensure the effective suction of the pump. Cheng! Another special case, but if the suction height is too large or the suction pipe diameter is too large, the volume exceeds the amount of liquid stored in the cavity of the corrosion-resistant self-priming pump, it will not work properly. At this time, a bottom valve must be installed to ensure safe and fast self-priming.
Therefore, the corrosion-resistant self-priming pump does not need to be equipped with a bottom valve, but it does not mean that the bottom valve cannot be installed. After the bottom valve is installed, the suction stroke of the pump will be more secure, especially for some small corrosion-resistant self-priming pumps. Small corrosion-resistant self-priming pumps generally do not have a one-way valve. The self-priming effect is achieved by the vacuum generated in the pump body instantly. Therefore, the suction effect of the pump will be better after the bottom valve is installed.
