Close-Coupled Straight Centrifugal Pump Seal Replacement | Video

This video demonstrates how to dismantle part of a centrifugal pump and replace the mechanical seal on the centrifugal pump. This includes removing the impeller from the pump, removing and replacing the mechanical seal, and reinstalling the impeller and reassembling the centrifugal pump.


Centrifugal pumps work by rapidly spinning a rotor, called an impeller, inside a case. Fluid is then introduced into the impeller. The fluid moves towards the edge of the impeller, called the vane, and then is forced through a suction port to the exterior of the casing. From here, the fluid exits a discharge port, where the centrifugal force the fluid received from the impeller is transferred into pressure.

How does a centrifugal pump work?

The mechanical seal on a centrifugal pump is most often used to seal the drive shaft entry point into the impeller housing. This stops fluids, typically under high pressure, from escaping out of the impeller housing. This is done by rubbing a carbon seal, attached to the mechanical seal, against a ceramic seal.