1. Do not operate without water, do not adjust the suction port to reduce the displacement, and do not operate at low flow rates.

2. Monitor the operation process and thoroughly monitor the leakage of the upper packing box. When replacing the packing box, new packing should be used.

3. Ensure that there is sufficient water flow for flushing the mechanical seal, and excessive water flow is prohibited for water-cooled bearings.

4. Do not use too much lubricant.

5. Inspect according to the recommended cycle. Establish operating records, including operating hours, adjustment and replacement of fillers, addition of lubricants, and other maintenance measures and time. The suction and discharge pressure, flow rate, input power, temperature of washing solution and bearings, as well as vibration of centrifugal pumps should be regularly measured and recorded.

6. The main engine of a centrifugal pump relies on atmospheric pressure to pump water from low to high places, and atmospheric pressure can only support a water column of about 10.3m at most, so the main engine of a centrifugal pump cannot work when it is 12 meters away from the water surface.