Self suction pump is a single stage single suction centrifugal pump, which is produced by the special structure of pump itself. It is called self-priming centrifugal pump. Compared with the ordinary centrifugal pump, there are significant differences in the pump structure: first, the pump inlet position increased, and sometimes equipped with suction valve; two, in the water side set a gas water separation room.
Outside pump self-priming pump is in the pump plus self suction device, such as with vortex pumps, water ring vacuum pumps, jet pumps and hand pumps.
Compared with the ordinary centrifugal pump self-priming pump, has the advantages of compact structure, simple operation, not only saves the start of the trouble filling water before, but also eliminates the need for low inlet valve, reducing water resistance, increase the pump out of water, but the efficiency of the ordinary centrifugal pump with the same specifications low compared to 3% to 5%. Self suction pump is more used in light and small irrigation units and pipe irrigation unit.
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