What Are The Maintenance And Upkeep Methods For Chemical Pumps?

Oct 14, 2025

In chemical production, chemical pumps are like flowing "hearts", transporting various corrosive, flammable, explosive, or toxic media. Once the pump malfunctions, it can result in production losses or even safety accidents. Therefore, scientific and meticulous maintenance is crucial. The following key steps help you ensure the safe operation of the pump:

 

I Daily care

 

1. Observe the Six Directions: Conduct daily inspections, focusing on whether there are any signs of leakage in the pump body, flange, and seal. Observe whether the oil level in the lubricating oil window is clear, visible, and within the normal range, and whether the cooling water is unobstructed.

2. Listen to all directions: Listen to the running sound, abnormal friction sound, sharp whistling or irregular impact sound are often alarms of bearing damage, impeller loosening or cavitation.

3. Touch temperature: Abnormal heating (significantly higher than ambient temperature or historical records) when touching bearing boxes, motor housings, and other parts usually indicates poor lubrication, component wear, or overloaded operation.

 

 

4. Instrument monitoring: Regularly record and compare key parameters such as pump inlet and outlet pressure, motor current, flow rate, etc. Abnormal fluctuations are often signals of internal wear, blockage, or changes in system resistance.

 

II regular inspection

 

1. Lubrication management: Strictly follow the instructions to replace lubricating oil/grease according to the required cycle and brand. Oil deterioration, emulsification, or impurities can accelerate bearing wear. Be sure to clean the oil chamber every time you change the oil.

2. Sealing inspection: Mechanical seals or packing seals are key to preventing leakage. Regularly check the sealing status and replace it in a timely manner if it is found to have worsened leakage, severe wear, or reached the end of its service life (usually measured by operating hours). Ensure the sealing chamber is cleaned and installed accurately during replacement.

3. Key component inspection: Based on major repairs or operational experience, regularly inspect the corrosion, wear, and cavitation of overcurrent components such as impellers and wear rings (wear-resistant rings). Severely damaged impellers can disrupt the hydraulic balance of corrosion-resistant pumps, leading to a sudden drop in efficiency and severe vibration.

 

 

4. Tightening and Calibration: Regularly check and tighten anchor bolts, flange bolts, coupling bolts, etc. to prevent loosening from causing vibration or leakage. If necessary, perform alignment calibration between the pump and motor (especially after maintenance), as poor alignment is the main cause of vibration and bearing damage.

5. Cooling/flushing system: Ensure that the cooling water pipeline is unobstructed and the cooling effect is good. Pumps with flushing schemes must ensure that the flow rate and pressure of the flushing solution meet the design requirements.

 

III Safety Specifications

 

1. Power off and hang a sign before homework: Before any maintenance operation, it is necessary to cut off the power and hang a "Do Not Close" warning sign to prevent personal injury caused by misoperation.

2. Medium discharge and isolation: When dealing with pumps involving hazardous media, it is necessary to ensure that the medium inside the pump is completely discharged and depressurized, and the inlet and outlet pipelines are effectively isolated.

3. Adequate personal protection: Wear appropriate protective goggles, chemical resistant gloves, protective clothing, and respiratory protective equipment if necessary to avoid contact with toxic and harmful media or splashes.

 

The value of prevention far outweighs repair! A maintenance system that combines daily meticulous monitoring and regular professional maintenance is the cornerstone of the long-term, safe, and efficient operation of corrosion-resistant chemical pumps. It can not only significantly reduce the risk of unexpected downtime, but also effectively extend the service life of equipment, safeguard personnel safety and environmental safety. Integrating maintenance awareness into daily life, making every pump a reliable force to ensure chemical production.