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What is a self priming pump
Jun 17,2022
Self-priming pump is a self-priming centrifugal pump, which has the advantages of compact structure, convenient operation, stable operation, easy maintenance, high efficiency, long life, and strong self-priming ability. There is no need to install a bottom valve in the pipeline, and it is only necessary to ensure that there is a quantitative liquid in the pump body before work. Different liquids can be self-priming pumps with different materials.
The working principle of the self-priming pump is that the pump casing is filled with water (or there is water in the pump casing) before the pump starts. After starting, 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 water inlet check door is opened, and the air in the suction pipe enters the pump and reaches the outer edge through the impeller channel.
There are many structural types of self-priming pumps, among which molten salt pumps, vacuum pumps, submerged pumps, metering pumps, gear pumps, corrosion-resistant pumps, acid-resistant pumps, and fire pumps flow in the direction of rotation. Then it joins with the water from the right return water hole and flows along the volute. Because the liquid continuously impacts the blade cascade in the volute, and is continuously broken by the impeller, it is strongly stirred and mixed with the air to generate a gas-water mixture, and it flows continuously so that the gas and water cannot be separated.
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