# 01 What Is The Difference Between Multistage Centrifugal Pump And Single-stage Centrifugal Pump?

## 01 What is the difference between multistage centrifugal pump and single-stage centrifugal pump?

Firstly, what is a multistage centrifugal pump? What is a single stage centrifugal pump? What is the difference between multistage centrifugal pump and single-stage centrifugal pump? What's the difference between centrifugal pump and metering diaphragm pump? This is what we all want to know about centrifugal pump. Let's discuss next.

The single-stage centrifugal pump is a flowing body and liquid, or a mixture of suspended particles and gas or liquid. The inlet at the root of the blade shaft enters, and the centrifugal force is obtained by rotating the blade, and then the high pressure is generated. The medium from the pressure relief outlet is transported and installed.

The multi-stage centrifugal pump is a combination of two pumps with the same function. In terms of the structure of the fluid channel, its performance is that the medium pressure relief port of the previous stage and the inlet of the later stage can pass through each other, so that the inlet of the multilevel series, the pressure relief port and the inlet are all intended to pass through, so the structure of the series connection forms the multistage centrifugal pump. The function of setting multistage centrifugal pump is to increase the set pressure.

What is the difference between multistage centrifugal pump and single-stage centrifugal pump?

Experts tell us that the difference between multistage centrifugal pump and single-stage centrifugal pump lies in the number of impellers. Multistage centrifugal pump is characterized by large pressure and small flow. Single stage centrifugal pump has only one stage impeller, which is characterized by low pressure and large flow.

First, single-stage pump refers to a pump with only one impeller, and the maximum lift is only 125m.

Second, the multistage pump with two or more impellers, the maximum head can exceed the head of single-stage centrifugal pump; When the lift of a single-stage pump of a multistage pump requires two-stage motors, the number of impellers can be increased to match the four-stage motor, so as to improve the service life of the pump and reduce the noise of the unit. However, the maintenance of a multistage pump is more difficult than that of a single-stage pump.

Third, when the actual required lift of the pump is not more than 125 meters, according to the area of the pump studio and the price of the pump, the multistage pump is generally more expensive. In addition, many reasons should be taken into consideration. The single-stage pump or the multistage pump should be selected.

Fourth, because there is only one impeller on the shaft of a single-stage centrifugal pump, and there are many impellers connected in series on the shaft of a multistage centrifugal pump. The impellers above the second stage are installed on the same shaft to work together. The output of the front impellers enters the input of the rear impellers. Each layer of impeller blades is called the first stage.