Chemical Pump Maintenance Tips
March 27, 2026
- 1. Check for looseness in the pipelines and joints of the chemical pump. Rotate the pump by hand to verify smooth operation.
- 2. Remove the water intake plug from the pump casing and fill with priming water (or slurry).
- 3. If abnormal noise is detected from the chemical pump, stop the machine immediately and investigate the cause.
- 4. Fully close the gate valve on the discharge pipeline, the outlet pressure gauge, and the inlet vacuum gauge.
- 5. Adjust the motor position and check that the rotation direction is correct.
- 6. Start the motor. Once the chemical pump operates normally, open the outlet pressure gauge and inlet vacuum gauge. After they show appropriate pressure, gradually open the gate valve while monitoring the motor load.
- 7. Keep the flow rate and head of the chemical pump within the range specified on the nameplate.
- 8. During operation, the bearing temperature shall not exceed 35°C above ambient temperature, and the maximum temperature shall not exceed 80°C.
- 9. Add bearing lubricant to the bearing housing and check that the oil level is aligned with the center line of the oil gauge. Lubricant shall be replaced or replenished in a timely manner.
- 10. When stopping the chemical pump, close the gate valve and pressure gauges before stopping the motor.
- 11. Replace the lubricating oil after one month (100 operating hours) of service, then every 500 operating hours thereafter.
- 12. Regularly adjust the packing gland to maintain proper dripping from the packing chamber.
- 13. Periodically inspect the wear of the shaft sleeve and replace it promptly if excessive wear is found.
- 14. For chemical pumps used in winter, after shutdown, loosen the drain plug at the bottom of the pump body to drain the medium completely to prevent freezing damage.
- 15. For long-term storage, fully disassemble the chemical pump, remove moisture, apply grease to rotating and mating parts, reassemble, and store properly.
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