Maintenance of Centrifugal Pumps

The maintenance of centrifugal pumps involves:

Determine the maintenance frequency with which the pumps should be checked and repaired. A certain time frame should be set to check the pump and verify if it is still working properly or as required.

Inspection and replacement of mechanical parts should be done regularly. The inspection can be a quarterly inspection, routine inspection or annual inspection. This inspection involves steps such as checking pipe lines for leakages, checking bearing temperature, increased vibration, unnatural and uneven noise, stuffing box, mechanical seal, discharge pressure and operating current. For annual inspection, check if all mount points are secure, clean filter, inspect pump flange for leaks, replace the mechanical seal, inspect coupling, replace lubricating oil and check shaft alignment.

Changing the pump's lube oil is part and parcel of the annual inspection routine or the scheduled maintenance. It is essential to prevent bearing damage. One should remember to follow the manufacturer’s guidelines when it comes time to lubricate the motor. Be careful not to over or under lubricate the system. The damage to the pump may be greater in case of over greasing than in under greasing, to prevent this, the manufacturer’s instructions must be followed. There is a need to frequently lube if the pump is used frequently on a daily basis.

Inspecting the electric motors as a way of preventive maintenance is very important. Checking the insulation resistance of connections, ensuring all connections are properly and tightly secured, inspecting the motor for any signs of blocked or overheating the vents.