How to correctly stop a high-flow, high-head multistage pump

Category: Water pump knowledge

2025-06-24

High-flow, high-head multistage pumps are widely used in industrial, agricultural, and municipal water supply applications. Correct operation is crucial for ensuring normal operation, extending service life, and preventing accidents. The following are some suggestions for shutting down high-flow, high-head multistage pumps.

I. Prior Notification and Preparation

Before shutdown, notify relevant personnel and ensure the safety of the pump and its surroundings. Simultaneously, close the pump's inlet valve to reduce the load and prepare for shutdown.

II. Gradual Pressure Reduction

Do not directly shut off the power. Instead, gradually reduce the pump's operating pressure. This protects the pump and motor, preventing damage from pressure surges.

III. Power Control Operation

Operate the power control switch according to the established shutdown procedure. Turn off the power switch first, then disconnect the power plug to ensure safety. Pay attention to personal safety during this process to avoid electric shock.

IV. Inspection and Recording

After shutdown, inspect and record the pump's condition. Check the pump's sealing, bearing temperature, impeller wear, etc. If any abnormalities are found, address them promptly and make a record. Also, record the shutdown time and reason for future analysis and summary.

V. Other Precautions

During shutdown, avoid sudden power or water outages. Sudden power or water outages can cause a sudden pressure change in the pump, damaging it. Additionally, avoid prolonged overload operation to prevent impacting the pump's service life.

VI. Safety Prevention and Maintenance

After shutdown, perform pump maintenance, including cleaning, rust prevention, and checking fasteners. Regularly maintain and repair the pump to ensure it is in good operating condition. Also, strengthen safety awareness, follow operating procedures, and ensure both personnel and equipment safety.

In short, correctly shutting down a high-flow, high-head multistage pump is crucial for ensuring normal operation and extending its service life. In practice, follow the steps of gradual pressure reduction, power control operation, and inspection and recording, and be careful to avoid sudden power or water outages and prolonged overload operation. Also, maintain and service the pump, strengthen safety awareness, and ensure both personnel and equipment safety.

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