What are the causes of leakage in high-efficiency and energy-saving multi-stage pumps?

2025-07-11

High-efficiency energy-saving multi-stage pumps are widely used in various industrial fields for fluid transportation. They are known for their stable performance and reliable operation; however, leaks may occur during use due to various factors. The following are the main causes of leaks in high-efficiency energy-saving multi-stage pumps.

I. Mechanical Seal Failure

The mechanical seal is a critical component in preventing leakage of the medium inside the pump. If the mechanical seal device is improperly selected or of poor quality, or if wear occurs due to long-term operation, it may cause seal failure and thus leakage.

II. Wear of Stationary and Rotating Rings

In a mechanical seal, the tight fit between the stationary and rotating rings is crucial for preventing leakage. Friction generated during pump operation may cause wear on the stationary and rotating rings over time, leading to leakage.

III. Pump Body Defects

If the pump body has manufacturing defects such as pinholes or cracks, or if fatigue cracking occurs due to long-term operation, this can also lead to leakage of the medium. In addition, an uneven mating surface between the pump body and the pump cover can also cause poor sealing and leakage.

IV. Medium Corrosion

Some media are highly corrosive. Long-term exposure may cause corrosion of the pump body, mechanical seals, and other components, leading to leakage.

V. Installation Issues

Improper installation of the multi-stage pump, such as misalignment of the mechanical seal or loose fastening bolts, can also cause leakage.

VI. Poor Operating Conditions

Poor operating environments, such as excessively high temperatures or large pressure fluctuations, can cause abnormal wear of the mechanical seal components, leading to leakage.

To address the above causes, the following measures should be taken to prevent and handle leakage problems in high-efficiency energy-saving multi-stage pumps:

1. Select appropriate mechanical seal devices and regularly inspect and replace sealing components.

2. Keep the pump body and its components clean, and regularly check the wear condition of the pump body and mechanical seal.

3. Select corrosion-resistant materials to handle highly corrosive media.

4. Strictly follow installation requirements for installation and commissioning.

5. Optimize operating conditions and maintain the stability of operating parameters such as temperature and pressure.

In summary, leakage problems in high-efficiency energy-saving multi-stage pumps should be taken seriously. Through proper use and maintenance, this problem can be effectively prevented and resolved.

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