Working principle of self-priming pump

Working principle of self-priming pump

The working principle of self-priming pump is: when the pump memory is full of water, the impeller rotates to produce centrifugal force, and the liquid flows to the vortex shell along the channel. The entrance to form a vacuum pump, open the door of inlet non-return, within the air into the pump suction inlet pipe, the impeller in the tank, air return with radial hole (or return pipe), mixed in water flowing down the road in the volute, together into the separation chamber, in the separation chamber, air separated from the liquid, the liquid back to the impeller, such repeated cycle, Until the suction pipe in the air exhaust, so that the liquid into the pump, complete the self-priming process.