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# What are the classifications of centrifugal pumps?

Aug 05, 2018

There are many classifications of centrifugal pumps, which are classified according to different structural characteristics.

One, classified according to the number of working impellers

1.single stage pump: that is, there is only one impeller on the pump shaft.

2. Multi-stage pump: that is, there are two or more impellers on the shaft of the pump, and the total head of the pump is the sum of the heads produced by n impellers.

Two. Classified according to work pressure

1.low pressure pump: pressure below 100 meters of water column;

2. medium pressure pump: pressure is between 100~650 meter water column;

3. high pressure pump: pressure is higher than 650 meters of water column.

Three. Classification according to the inlet mode of the impeller

1.single inlet pump: also called single suction pump, that is, there is only one inlet on the impeller.

2.double inlet pump: also called double suction pump, that is, both sides of the impeller have an inlet. Its flow is twice as large as that of the single suction pump. It can be regarded as two single suction pump impeller placed back-to-back.

What are the classifications of centrifugal pumps?

Four. Classified according to the joint joint of the pump shell

1.horizontal open pump: that is, there is a joint seam on the horizontal plane through the axis line.

2. vertical joint surface pump: the joint surface is perpendicular to the axis line.

Five, according to the position of the pump shaft

1.horizontal pump: the pump shaft is located in the horizontal position.

2.vertical pump: the shaft of the pump is located in the vertical position.

Six, according to the way out of the water from the impeller to the chamber.

1. Volute pump: after the water comes out of the impeller, it directly enters the pump shell with spiral shape.

2. Guide vane pump: after the water comes out of the impeller, it enters the guide vane outside it, then enters the next stage or flows into the outlet pipe.

Usually we say that a pump belongs to the multistage pump, which means the number of impeller.

According to other structural features, it may also be horizontal pump, vertical joint surface pump, vane pump, high-pressure pump, single-side intake pump, etc.

Therefore, according to the difference, the call is different. In addition, they can be classified according to their usage, such as oil pumps, water pumps, condensate pumps, ash pumps, circulating pumps, etc.