How to adjust the concentricity of a high-flow, high-head multistage pump

Category: Water pump knowledge

2025-06-25

Adjusting the concentricity of a high-flow, high-head multistage pump is crucial for its operational efficiency and lifespan. Here are some suggestions on how to adjust the concentricity of a multistage pump.

1. Understanding Concentricity

Concentricity refers to the degree of alignment between the pump shaft centerline and the centerlines of components such as the impeller and seals. Good concentricity ensures smooth pump operation, reducing energy consumption and wear.

2. Preparing Adjustment Tools

Before adjusting concentricity, prepare the necessary measuring tools, such as dial indicators and vernier calipers, and ensure they meet the required accuracy standards.

3. Preliminary Inspection

Before adjustment, check that all pump components are intact, especially critical parts such as bearings and seals. If any damaged or severely worn parts are found, they should be replaced first.

4. Adjustment Steps

Positioning the Dial Indicator: Secure the dial indicator to the pump housing so that its probe contacts the rotating component (such as the impeller).

Rotating the Pump Shaft: Slowly rotate the pump shaft and observe the dial indicator readings.

Adjusting Deviation: Based on the dial indicator readings, determine the direction and extent of the shaft centerline deviation. Then, correct the deviation by adjusting the pump base bolts, bearing clearances, or seals.

Repeat Inspection: After adjustment, use the dial indicator again to verify that the concentricity meets the requirements.

5. Attention to Details During Adjustment

Ensure the pump is in a stable operating environment to avoid inaccurate adjustment results due to external factors.

During adjustment, pay attention to safety and avoid contact between hands or other body parts and rotating components.

Adjustments should be made gradually; do not rush to ensure accuracy with each adjustment.

6. Subsequent Inspection and Maintenance

After adjusting the concentricity, regularly inspect and maintain the pump to ensure its long-term stable operation. If concentricity problems are found, adjust them promptly.

In addition, for high-flow, high-head multistage pumps, their specific operating environment and requirements may need to be considered. For example, in some cases, professional technical support and more precise measuring equipment may be needed to adjust concentricity.

In summary, adjusting the concentricity of a high-flow, high-head multistage pump is a specialized technical task requiring experience and knowledge. It is recommended to refer to relevant manuals or seek assistance from professional technicians during adjustment.

Previous: No more!

Next: How to use a percentage gauge on a high-flow, high-head multistage pump

Contact Us

Free Hotline:0086-13307481676

Fixed telephone:0086-13307481676      

Mobile:0086-13307481676(WeChat)

E-mail:sales@sanchangpump.com