How to Conduct Mechanical Dosing Pump Routine Maintenance Properly?

Mechanical dosing pump is a commonly used flow metering device used in chemical, pharmaceutical and other industries. Routine maintenance is crucial to ensure its normal operation and service life. Here are some suggestions for the mechanical dosing pump daily maintenance. You can perform regular maintenance and upkeep according to the specific conditions of your dosing pump.

Preventive Maintenance

• Lubricating oil. The newly activated pump will need to replace the lubricating oil of the cabinet after running for 800 hours, and will be replaced once every 3,000 hours or half a year later (NDW, ND1000 and HND types).
• Lubricating grease. The newly activated pump, after running for 2,000 hours, will need to check if the lubricating grease of the cabinet is sufficient and add enough lubricating grease if the cabinet lacks lubricating grease. Check the lubricating grease once every 3,000 hours or half a year later (NDJ and ND2000 types).
• Diaphragm. Replace once every 5,000 hours or every year.
• Oil seal. Replace once a year.
• Others. Replace the check valve ball, valve seat, gasket and O-ring every 5,000 hours. If transporting high viscosity or highly corrosive materials, it is necessary to increase the frequency of replacing spare parts.

Before performing any maintenance on the pump, the equipment shall be stopped, the system pressure shall be released, and the inlet and outlet valves connected to the system shall be closed. If any fault is found during operation, cut off the power supply immediately.

Routine Maintenance Procedures

Regularly check whether the amount of lubricating oil is sufficient, whether there is leakage, and whether it is aging or not.

• Check the sealing of mechanical parts.

  Check all parts connected to the box body for leakage. If leakage occurs, replace the sealing ring at the connection, such as motor mounting flange, stroke adjustment, transition section, box body oil window, oil outlet hole and other parts.

• Check the flow rate of the pump.

  Through the calibration of the pump displacement, we can judge whether the pump is transporting materials normally. If the pump displacement exceeds the range, we need to contact the manufacturer to carry out the corresponding maintenance work.

• Leakage at the detection port.

  Check whether the liquid collected at the pump head inspection port is transported material or lubricating oil. If the inspection port leaks material transported by the pump, the diaphragm is cracked and the diaphragm needs to be replaced. If lubricating oil leaks from the inspection port, the oil seal is cracked and the oil seal needs to be replaced.

The routine maintenance of mechanical dosing pump is very important. Perfect routine maintenance procedures can extend the service life of the pump, reduce the possibility of faults occurrence and improve the production efficiency.