What is the working principle of self-priming pump? Ordinary centrifugal pump, if the inhalation of liquid below the impeller, the start should be pre-irrigation, very inconvenient. In order to store water in the pump, suction pipe inlet need to be installed at the end of the valve, the pump at work, the end valve caused great hydraulic losses. The so-called self-priming pump, is not required before the start of irrigation (after the first start of the installation still need irrigation), after a short period of operation, by the pump itself, that is, the water can be sucked up, put into normal work. Self-priming pump according to the principle of action is divided into the following categories: 1, gas-liquid hybrid (including the internal and external mix) 2, water ring 3, jet (including liquid jets and gas jets). Gas-liquid hybrid self-priming pump work process: Due to the special structure of the self-priming pump body, the pump stops, the pump body has a certain amount of water, the pump starts again after the impeller due to rotation, inhalation of air and water pipe Fully mixed, and was discharged to the gas-water separation chamber, the gas above the gas-water separation chamber overflows, the lower part of the water back to the impeller, and re-inhalation of the remaining air intake pipe until the pump and the suction pipe all the gas discharge, complete since Suction, and normal pumping. Water ring wheel self-priming pump is the water ring and pump impeller channel, and let go of the water ring inside the liquid. Jet-type self-priming pump, the centrifugal pump and jet pump (or injector) combination of relying on the jet device, resulting in a vacuum nozzle to achieve suction.
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