What is a probable cause for a centrifugal pump to run hot?

A probable cause for a centrifugal pump to run hot is that the pump packing is too tight. When the packing around the shaft of the pump is overly compressed, it creates excessive friction against the rotating shaft. This additional friction generates heat, leading to a rise in the operating temperature of the pump. Overheating can result in reduced efficiency, potential damage to the pump, and increased wear on components, which can ultimately lead to pump failure if not corrected. Maintaining proper packing adjustments is crucial for optimal pump performance and longevity.