Does the stainless steel self-priming pump need a bottom valve?

Stainless steel self-priming pump
(1) Does the stainless steel self-priming pump need a bottom valve?
Generally speaking, there is no need to install a bottom valve. Generally, the inlet of the stainless steel self-priming pump is equipped with a check valve. After the stainless steel self-priming pump is shut down, the liquid in the pump chamber cannot return to the original pool, but is stored in the pump chamber. Therefore, there is no need to add liquid for the second use. However, it does not mean that the stainless steel 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 still a bottom valve to ensure that there will be no idling, and the installation of the bottom valve will effectively ensure the effective suction of the pump!
(2) Stainless steel self-priming pump with bottom valve?
If the bottom valve is installed, the effect will be better, because if the one-way valve is damaged sometimes, there is still the bottom valve as a guarantee that there will be no idling, and the installation of the bottom valve will effectively ensure the effective suction of the pump! Another special case, however, if the suction height difference is too large, or the diameter of the suction pipe is too large, and the volume exceeds the liquid storage volume in the pump chamber of the stainless steel self-priming pump, it will not work normally. At this time, the bottom valve must be installed to ensure the safety and speed of self-priming.
Therefore, the stainless steel self-priming pump does not need to be equipped with a bottom valve, but it does not mean that the bottom valve can not be installed. After the bottom valve is installed, the suction range of the pump will be more guaranteed, especially for some small stainless steel Self-priming pumps, because the small stainless steel self-priming pumps generally do not have a one-way valve and rely on the vacuum generated in the pump body to achieve the self-priming effect, so the suction effect of the pump will be better after the bottom valve is installed!

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