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Difference Between Self Priming Pump And Centrifugal Pump

Feb 17, 2020

Centrifugal pump uses impeller rotation to make water centrifugal movement to work. Before starting the water pump, the pump shell and suction pipe must be filled with water, and then the motor shall be started, so that the pump shaft drives the impeller and water to rotate at high speed, and the water is centrifugal, thrown to the outer edge of the impeller, and flows into the water pressure pipeline of the water pump through the passage of the volute pump shell.


The working principle of self-priming pump is: before starting the pump, fill the pump shell with water (or there is water in the pump shell). After startup, the impeller rotates at a high speed so that the water in the impeller channel flows to the volute. At this time, a vacuum is formed at the inlet, so that the check valve of the water inlet is opened, and the air in the suction pipe enters the pump and reaches the outer edge through the impeller channel. The self-priming pump belongs to the self-priming centrifugal pump, which has the advantages of compact structure, convenient operation, stable operation, easy maintenance, high efficiency, long service life and strong self-priming ability. The pipeline does not need to be installed with bottom valve. Before operation, it is only necessary to ensure that the pump body is stored with quantitative liquid extraction. Different materials of self-priming pump can be used for different liquids.