The self-priming pump has a certain self-priming capability, which makes the pump difficult to start when it absorbs water and keeps it running normally. The self-priming pump currently produced in China is basically a self-priming centrifugal pump.
The self-priming pump can be divided into external mixed self-priming pump, internal mixed self-priming pump and vacuum-assisted self-priming pump with power provided by the pump itself due to the different ways of self-priming. According to the liquid transport and material, it can be divided into sewage self-priming pump, water self-priming pump, corrosion resistant self-priming pump, stainless steel self-priming pump and other self-priming pump structure.Basic structure of self - priming pump.Its main parts are: pump body, pump cover, impeller, shaft, bearing and so on.The pump body is provided with a vortex flow passage, and the outer layer of the flow passage is surrounded by a gas-water separation chamber with a large volume. The lower part of the pump body is cast with a seat Angle as a fixed pump.