There are many types of centrifugal pumps in common use: single-stage centrifugal pumps, multi-stage centrifugal pumps, double-suction centrifugal pumps. Centrifugal Pump Exporters share with you.
Only a single-stage centrifugal pump in these three kinds of products have certain self-priming capability, the other two kinds of multistage centrifugal pump and double suction centrifugal pump self-priming pump ability, if the liquid level is lower than pump other diversion method must be used to pump water, common way of diversion is vacuum water diversion way or in the pump inlet mounted to the tank water diversion way.
Reasons why single-stage centrifugal pump can't pump water
Although the single-stage centrifugal pump has a certain self-priming capacity, it is necessary to ensure that the full seal cannot leak air during the installation of the inlet pipeline.
The reason why the centrifugal pump cannot be pumped may be that the user has not installed and used it correctly. The correct installation and use method is to install a bottom valve on the suction pipe of the centrifugal pump. Before starting, the entire pump body and the inlet pipe must be filled with water. Before starting, you need to close the water outlet valve, and then slowly open the water outlet valve after starting the centrifugal pump. Each single-stage centrifugal pump also has different self-priming performance depending on the model. You need to understand each single-stage centrifugation when selecting the model. The cavitation margin of the pump model can know the effective self-priming height of this centrifugal pump.
The reason why the single-stage centrifugal pump cannot be pumped is that the self-priming height exceeds the effective self-priming height of the centrifugal pump. The self-priming height of the conventional single-stage centrifugal pump is less than 3 meters. If it exceeds this height, it should be selected from the suction. Centrifugal pump or high suction self-priming pump with vacuum assist.
The reason why the single-stage centrifugal pump in use cannot pump water may also be caused by debris clogging in the pump cavity, impeller, foot valve, pipeline and other places.
If a single-stage centrifugal pump leaks water, it will also cause the centrifugal pump to fail to pump water.
The newly installed centrifugal pump can not pump the water may also be the motor steering is not right, if the steering is not necessary to power off after the replacement of any two power lines can be.
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