Single-stage pump is the only one impeller pump, the maximum head is only 125 meters;

    Multi-stage pump refers to two or more of the impeller pump, the highest lift can be more than 125 meters; multi-stage pump in a single-stage pump lift need must be equipped with two motors through increasing impeller number is equipped with four motors, which can improve the pump service life and reduce the noise of machine set, but multistage pump maintenance relatively single-stage pump is difficult to a point.

    The actual pump need to lift of less than 125 meters, according to the pumping station area, pump prices (multi-stage pump in general than the single-stage pump price is on the high side, factors such as comprehensive consideration in the selection of a single-stage pump or a multi-stage pump.

    With the progress of technology, single-stage impeller pump can be by increasing the pump speed to increase the pump head can be replaced by multistage pumps, but prices a little expensive.