What Is The Cause Of Noise in Centrifugal Pumps

Oct 15, 2025

Various centrifugal pumps inevitably encounter noise and vibration during use. So, what are the reasons for the noise and vibration of centrifugal pumps?

 

1.Cavitation occurs

 

Cavitation is the main cause of noise, vibration, and efficiency decline in the operation of centrifugal pumps. Cavitation not only affects the fluid flow state, but also its dynamic response. In the long run, cavitation may also cause damage to the surface of the flow passage of centrifugal pumps, seal failure, and bearing wear.

 

2. The pump shaft is not concentric with the electric motor

 

The centrifugal pump series products used belong to the centrifugal pump matching joint. During installation or repair, if the motor or pump head is displaced due to the installation of the joint between the motor and the pump, or if the balance between the motor and the pump is not adjusted properly after repair, noise and vibration phenomena may occur. To solve this phenomenon, uncoupled centrifugal pumps such as single-stage horizontal centrifugal pumps can also be selected.

 

3. The export flow is too large

 

Many users, due to a lack of understanding of the performance of centrifugal pumps when choosing chemical centrifugal pump models, may assume that as long as a high head centrifugal pump head is selected, it can be used. Due to this idea, it often leads to the phenomenon of noise generated during the vibration process of using a centrifugal pump.

 

 

The actual use of a low head centrifugal pump due to its high height can result in a large outlet flow rate, while a high flow rate can cause excessive resistance and vibration in the suction pipeline. In severe cases, it can lead to motor overcurrent and burnout. Therefore, if the centrifugal pump is already in use, it is recommended to close the small outlet valve or replace the centrifugal pump impeller.

 

4.Loose foundation or fasteners

 

Long term use of corrosion-resistant centrifugal pumps may result in loose anchor bolts or pump body bolts of the centrifugal pump motor. Therefore, it is often observed during use that loose bolts need to be fixed.

 

5.Centrifugal pump bearings damaged

 

Each centrifugal pump bearing has a service life, and wear may occur during high-speed rotation. If there is friction or wear on the rotating parts, there will be significant noise. If there is a lack of oil in the bearing box, it can also cause bearing damage and produce noise or vibration.