What's The Reason For The Small Suction Of Self-priming Pump?

What's the reason for the small suction of self-priming pump? Today let us talk together!

What should I do if the suction of self-priming pump is not large?

self-priming pump


1、 What is the reason for the small suction of self-priming pump


Conventional Self-priming pumps, such as ZW / ZWL Self-priming sewage pump, ZX / zxl self-priming centrifugal pump, sfbx small stainless steel self-priming pump, these common self-priming pump products, because they use centrifugal pump impeller and the pump body has small water storage volume, so the suction of these Self-priming pumps is not very large, so the self-priming time is relatively long, the water feeding time is particularly slow, and the self-priming height is high, such as self-priming When the suction height is 5 meters, it will take more than 10 minutes to pump water, or even add water to the pump while running. Some users put their hands on the suction port and say that the suction is not strong at all, so they want to understand the reason why the suction of the self-priming pump is not strong. What need to be explained here is that these Self-priming pumps are slow in exhausting air, so they are used It's not normal to put your hand on the suction port.


The reason for the small suction of the self-priming pump may also be that the mechanical seal of the self-priming pump is not tight, or it may be that the seal of the inlet pipe is not tight, which leads to the lack of water, so the suction of the self-priming pump is considered to be small.

selfpriming pumps


2、 How to deal with the low suction of self-priming pump


Conventional centrifugal self-priming pump products can send self-priming pump to our Boyu pump industry company to optimize and upgrade the self-priming capacity of self-priming pump for you. For example, the self-priming height of conventional self-priming pump is only 4-5m, while our Boyu company has the invention certificate to increase the self-priming force of self-priming pump, so that the self-priming pump with the self-priming height of only 4-5m can achieve the self-priming height of 6 -About 9 meters.

Other on-site Self-priming pumps can pump water up after filling the pump with water for the first time, but after stopping the pump for several hours or one night, the next time they start the pump, they must add water to the pump to pump up. Most of the reasons are due to the small cavity of the self-priming pump, because the sealing of the conventional self-priming pump inlet check valve is not very good after stopping the pump, resulting in the water in the pump body Some water has been lost due to backflow phenomenon, so the second start-up requires water replenishment to suck up the water, so what about the so-called suction of self-priming pump: if it is clear water, a bottom valve can be added, and those who are not willing to add a bottom valve can send the pump to our company to optimize and upgrade the self-priming capacity of self-priming pump for your special processing, so as to improve the self-priming height of the original self-priming pump by 4-5m The self-priming pump can be raised to 6-9 meters, 6-8 meters is one grade, 8-9.2 meters is another grade, and the prices of the two grades are different.


The shape of the self-priming pump with 6-7m self-priming height is the same as that of the ordinary self-priming pump. We only change some shape and size inside the pump body. The self-priming pump with 8-9.2m self-priming height is equipped with a set of vacuum auxiliary system on the basis of the self-priming pump. If a set of vacuum auxiliary device is added on the basis of the self-priming pump with changed self-priming height, the self-priming pump is self-priming The suction capacity is more powerful, and the horizontal distance can reach about 150 meters. In addition, when the self suction height is 9.2 meters, the water can be quickly pumped up.

selfpriming pump