Under what circumstances do high-flow, high-head multistage pumps require shutdown and maintenance?

2025-06-19

High-flow, high-head multistage pumps require immediate shutdown and maintenance when encountering abnormal flow, large pressure fluctuations, noise and vibration, high temperature, or leakage to ensure safe operation and extend service life.

I. Overview

High-flow, high-head multistage pumps are widely used in water supply, industrial, and agricultural fields, characterized by stable performance, high flow rate, and high head. To ensure normal operation and extend service life, immediate shutdown and maintenance are required under specific circumstances.

II. Abnormal Situations

1. Flow abnormality: When the flow rate of the multistage pump suddenly increases or decreases, deviating significantly from the set value, it may indicate a fault within the pump, such as internal leakage or impeller damage, requiring shutdown and maintenance.

2. Pressure fluctuation: Significant pressure fluctuations in a high-head multistage pump may indicate unstable operating conditions, possibly due to pipe blockage or impeller wear, requiring immediate shutdown and maintenance.

3. Noise and vibration: If the pump produces abnormal noise or vibration during operation, it may be due to bearing wear, pump body loosening, etc., requiring immediate shutdown and inspection.

4. High temperature: If the pump body or motor temperature is too high, it may cause equipment damage, requiring shutdown and inspection of the cooling system and bearing lubrication.

5. Leakage: Leakage from the pump body seals not only affects efficiency but may also pollute the environment, requiring immediate shutdown and maintenance.

III. Maintenance Content

1. Check the wear and tear of easily damaged parts such as impellers and bearings; replace them if damaged.

2. Check if the connections between the pump body and pipes are tight to prevent leakage.

3. Check the performance of the sealing device to ensure good sealing.

4. Check the integrity of electrical components such as motors and cables to ensure electrical safety.

5. Check the lubrication system to ensure good lubrication of bearings and other moving parts.

6. Clean the pump body and pipes to prevent blockage.

IV. Precautions

1. Before shutdown, close the outlet valve to reduce the load before shutting down.

2. During maintenance, strictly follow the safety operating procedures to ensure personal safety.

3. After maintenance, conduct a test run to confirm that the equipment has returned to normal before putting it back into use.

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