In the process of daily use of self-priming centrifugal pumps, if the self-priming pump cannot suck water, there may be a variety of reasons. These reasons include, but are not limited to, the following:
First of all, it is a common problem for users to not fill up with enough water before starting the self-priming pump. Although it appears that the filled water has spilled through the vent, the air is completely exhausted without turning the pump shaft, resulting in a small amount of air remaining in the inlet pipe or pump body. This affects how well the self-priming pump absorbs water.
Secondly, the installation of the water inlet pipe is also an important factor affecting the water absorption effect of the self-priming pump. If the horizontal section of the inlet pipe is against the direction of the flow without applying 0A descending slope of more than 5%, or if the end connected to the pump inlet is not the highest, but is completely horizontal or upward, then air will remain in the inlet pipe, reducing the vacuum in the water pipe and the self-priming pump, thus affecting water absorption.
In addition, worn packing or over-pressing of the packing of self-priming pumps is also a common problem. This causes a large amount of water to be ejected from the gap between the packing and the shaft sleeve of the pump, causing air from the outside to enter the inside of the pump, thus affecting the lifting effect.
In addition, problems such as holes in the wall of the inlet pipe, cracks in the elbow of the inlet pipe, and small gaps in the connection between the inlet pipe and the pump may cause air to enter the inlet pipe, thus affecting the water absorption effect of the self-priming pump.
In addition, human factors can also cause self-priming pumps to not be able to suction water. For example, some users are randomly equipped with another motor to drive because the original motor is damaged, resulting in small flow, low head and even no water. In addition, factors such as the wear of the transmission belt, the improper installation of the self-priming pump, the mechanical failure of the self-priming pump itself, and the poor maintenance of the power machine may also cause the self-priming pump to fail to absorb water.
To solve these problems, it is first necessary to determine the specific cause of the self-priming pump not being able to absorb water. For the user, they can make sure the self-priming pump is filled with enough water before starting it and turn the pump shaft to completely expel the air. At the same time, they also need to check the installation of the inlet pipe to ensure that the horizontal section of the inlet pipe has a 0The descent slope is more than 5%, and the end connected to the pump inlet is the highest. In addition, they need to regularly inspect the packing of the self-priming pump for wear and for corrosion or holes in the walls of the inlet pipes.
For problems with the self-priming pump itself, users may need to seek help from professional maintenance personnel. For example, if the packing of a self-priming pump is worn out severely, it will need to be replaced with a new one. If the wall of the inlet pipe is corroded or there are holes, the inlet pipe needs to be repaired or replaced.
Overall, the inability of a self-priming centrifugal pump to suck water can be due to a number of reasons. In the process of using the self-priming centrifugal pump, users need to pay attention to the various factors mentioned above and take corresponding measures to ensure the normal operation of the self-priming centrifugal pump. Only in this way can we ensure that the self-priming centrifugal pump can play its due effect and provide convenience for the user's production and life.