Multistage pumps are mainly used for high temperature condensate recovery, boiler feed water, and also for water supply and drainage in factories, cities and mines.

Features of multistage pumps:

The characteristics of the multi-stage pump are reflected in the head performance. The output head parameter is more than 125 meters, far exceeding most other types of pump products. It is suitable for various pressurized water transportation occasions. In addition to the impeller structure, the other parts of the pump body are almost the same as the traditional pipeline pump and centrifugal pump, so it is also convenient to install and use.

Most centrifugal pumps use a single-stage impeller structure, that is, there is only one set of impellers inside, while multi-stage pumps have more than two impellers connected in series on the internal impeller structure to improve the lift parameters. The internal volume of the pump cavity is constantly changing to achieve suction, compression, and exhaust to complete the liquid transportation. This structural design allows the multi-stage pump to maintain a high head while maintaining the characteristics of stable operation and long-term trouble-free operation of the centrifugal pump.

Like centrifugal pumps and pipeline pumps, multi-stage pumps are driven by motors. At present, most of the internal impellers are composed of 2-13 sets of impellers. The more impellers, the higher the lift. According to the actual pump needs of customers, series impellers can be specially customized. . To put it simply, a multi-stage pump is a centrifugal pump with better performance parameters. Since the cost of making the pump is higher than that of a single-stage pump, there is no need to deliberately choose a multi-stage pump for users who do not have such high requirements for head parameters.

Advantages of multistage pumps:

1. The multi-stage pump has a horizontal structure and a vertical structure. The multi-stage pump of the vertical structure occupies a larger area, the multi-stage pump of the horizontal structure occupies a small area, and the center of gravity of the multi-stage pump of the vertical structure coincides with the pump. The center of the foot, so the operation is relatively stable, the vibration is small, and the use time is long.

1. The multi-stage pump has the same caliber and is on the same level as the motor. There is no need to change the multi-stage pump pipeline structure. It can be directly installed on any part of the pump pipeline, and the installation is also very convenient.

1. Add a rain cover above the motor, the motor can be used outdoors, and there is no need to build a separate pump room, which also saves some costs for the user.

1. The head of the multi-stage pump can meet the needs of different user working conditions by changing the number of impeller stages of the multi-stage pump, so the scope of application is also relatively wide.

1. The shaft seal of the multi-stage pump is made of cemented carbide mechanical seal, which has reliable sealing performance, no leakage and small mechanical energy loss.

Disadvantages of multistage pumps:

1. It can only be used to transport neutral mineral water less than 1.5% and other similar sewage. The temperature of the medium cannot be higher than 80 degrees, but in this case, the material of the multi-stage pump can be changed to meet the needs of different users.

1. The pressure of the multi-stage pump cannot exceed 0.6MPa.

1. The temperature range of the multistage pump medium is -20℃～105℃, and the medium cannot contain fixed particles, and the corrosive medium liquid should change the pump body material of the multistage pump.

Conclusion

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