How To Disassemble, Inspect And Clean A Centrifugal Pump

Oct 24, 2025

 

1, Preparation work before dismantling centrifugal pump

 

1. Close the inlet and outlet valves and drain the liquid from the pump body.

2. Disconnect the power supply to ensure safe operation.

3. According to the user manual, check the special safety precautions before disassembly.

 

2, Disassembly steps of centrifugal pump

 

1. Disassemble the pump cover

Loosen the bolts that fasten the pump cover and slowly remove it using a pull rod or bolt jack, without pulling or pulling forcefully.

2. Check the impeller

Slowly remove the impeller by hand or other tools, and check whether the gap between the impeller and the pump body is worn or stuck. If any problems are found, they should be replaced in a timely manner.

3. Disassemble the mechanical seal

First, clear the position where the pump body is connected to the mechanical seal, and then use a special tool to disassemble the mechanical seal, taking care to avoid damaging the shaft seal.

4. Disassemble bearings and shafts

 

 

Bearings and shafts should be operated with caution to avoid scratches. It is necessary to gently remove the bearings and pay attention to the gaskets around the bearings.

5. Disassemble the stator

Loosen the stator screws with a screwdriver, remove the stator and inspect it.

 

3, Centrifugal pump cleaning steps

 

1. Clean the pump body, impeller, and shaft

Thoroughly clean the pump body, impeller, and shaft with a cleaning agent, using a soft bristled brush or detergent, but do not use acidic or alkaline solutions.

2. Clean the mechanical seal and stator

When cleaning the mechanical seal and stator, special tools should be used to disassemble the mechanical seal, and the stator should be soaked in cleaning solution, then gently brushed with a soft bristled brush.

3. Check and clean the bearings

Check the bearings for wear or damage, and clean the bearings and bearing seats with detergent.

 

4, Maintenance suggestions

 

1. Regularly inspect and replace the mechanical seal inside the pump body to prevent leakage.

2. Avoid using chemicals and clean them promptly once used.

3. Regularly check the flow and pressure of the pump to ensure its normal operation.

4. Regularly replace the lubricating oil in the pump to ensure its lubrication effect.

5. Regularly clean the dust and dirt inside and outside the pump to ensure its appearance and cleanliness.

In short, centrifugal pumps are important equipment in industrial production, and maintenance and upkeep of pumps are crucial. Only regular inspection and cleaning can ensure that the pump always maintains normal working condition.