Ordinary centrifugal pump, if the inhalation of liquid below the impeller, the start should be pre-irrigation, very inconvenient. In order to pump the water in the reservoir, the intake of the suction pipe needs to be fitted with a bottomed valve, which causes great hydraulic losses when the pump is in operation.
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 inside and outside mixed); 2, water ring; 3, jet (including liquid jets and gas jets).
Working principle of gas-liquid hybrid self-priming pump Working process of gas-liquid hybrid self-priming pump: Due to the special structure of self-priming pump body, a certain amount of water is stored in the pump body after the water pump stops. Since the impeller Rotation, the suction pipe air and water mixed thoroughly, and was discharged to the gas-water separation chamber, gas-water separation chamber above the overflow, the lower part of the water back to the impeller, re-intake pipe and the remaining air mixing until the pump And the suction tube all the gas discharge, to complete self-absorption, and normal pumping.
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