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Centrifugal Pump Bearing Failure: Causes and Prevention
Borra Pumps

Centrifugal Pump Bearing Failure: Causes and Prevention

Centrifugal pump bearing failure should be investigated as a failure of the supported rotating system, not solved automatically by fitting another bearing. First determine whether the affected bearing belongs to the pump or the motor, then preserve the operating history and failed parts. Review lubrication, contamination, loading, alignment, installation and the hydraulic duty. Noise, heat or vibration can identify a concern but do not by themselves prove a particular cause. Use the actual bearing arrangement and manufacturer procedure to decide what to...

Centrifugal Pump Minimum Flow: Why It Matters
Borra Pumps

Centrifugal Pump Minimum Flow: Why It Matters

Centrifugal pump minimum flow is the lower operating limit specified for the actual pump and service conditions. It matters because a pump can remain running while operating in a condition that creates excessive heating, unstable hydraulic behavior or damaging mechanical loads. Minimum thermal flow and minimum continuous stable flow address different concerns and should not be assumed identical. Obtain the limits for the supplied configuration, then check every operating case against them. A bypass, a control strategy or a smaller pump must...