The reason and elimination method of self-priming pump can not suck water

The main function of the self-priming pump is to absorb water for us. If this product does not work once it cannot absorb water, what factors will cause the self-priming pump to fail to absorb water?

This article contains the following:

n  The reason of self-priming pump can not suck water

n  How to solve these problems

The reason of self-priming pump can not suck water

First, the suction stroke is too large.

When installing the pump, it is not easy to be greedy and simple, because the vacuum degree that can be established at the suction port of the pump is limited, and the maximum suction range of each centrifugal pump is generally between 3 and 8.5 meters.

Second, there is air in the water inlet pipe and the pump body.

There are many reasons for the air in the inlet pipe and the pump body. For example, the inlet pipe has holes due to long-term potential underwater, corrosion of the pipe wall, and cracks at the inlet pipe bend.

Third, when the pipeline is too long, there are too many bends, or some details such as the diameter of the pump in and out of the pipe, it will cause excessive resistance loss of the water flow in the pipe.

Fourth, the low speed of the self-priming fire fight pump will also cause the self-priming pump to be unable to absorb water. The main reasons are as follows:

(1) Human factors.

(2) Improper installation.

(3) The drive belt is worn.

(4) Mechanical failure of the pump itself.

(5) Power machine maintenance is not recorded.

Fifth,Influence of other factors.

(1) If there is leakage in the outlet pipe, it will also cause non-absorption.

(2) Failure or clogging of the gate valve or check valve will cause the flow rate to decrease or even fail to pump water.

(3) The filter mesh of the bottom valve is blocked;

How to solve these problems

Since the suction pipe of the self-priming pump is not tightly sealed, the self-priming pump is always in the pumping state, so the self-priming pump cannot absorb water. Solution: Check the sealing of the inlet pipe of the self-priming pump, and repair the air leakage points, such as welding points, pipe joints and other places where air leakage is suspected. For example, turn off the pump after 5 minutes and hear the sound of air absorption near the pipe.

The self-priming pump will not be able to absorb water due to corrosion or wear, mechanical seal leakage, etc. after a period of use. Solution: Replacing new damaged parts can solve the problem.

Due to the large amount of impurities in the transported liquid, blockage will occur in the pipeline or bottom valve or even the pump body, which is why the self-priming pump cannot absorb water. Solution: Find the specific clogging point and clear the debris to solve the problem.

Due to the unreasonable installation of imported pipelines, if there are too many elbows, it is necessary to control the number of elbows between 1-2 elbows, preferably a 45-degree elbow, and the pipe diameter and the diameter of the pump will not match As a result, the self-priming pump cannot absorb water.

Self-priming pump selection

Choose a self-priming pump that meets the lift requirements

Choose a suitable flow self-priming pump

Choose the right suction pump

If you want to buy self-priming pump,please contact SUOTO PUMP.