Spare Parts for Rotodynamic Pumps
Shaft sleeves and bearings are among replacement parts needed

What are essential spare parts to keep on hand for rotodynamic pumps?

In rotodynamic pumps, badly worn wear components can result in severe degradation of pump head and rate of flow, especially on small pumps. Therefore, it is important to monitor the condition of the equipment and be prepared to make repairs. When making repairs, examination of wear patterns can provide valuable information that can help diagnose pump problems and determine their origin.

The list of recommended spare parts depends on factors such as normal supplier lead time when ordering, whether pumping equipment is for use as normal or severe duty, and if there is backup pumping while a unit is down for maintenance and component parts replacement.

An example of spare parts for service handling abrasive liquids that may experience interrupted service includes:

  • shaft sleeves
  • bearings
  • wearing rings
  • packing or mechanical seals
  • gaskets and O-rings
  • coupling connectors
  • impeller

Recommended spare parts lists for other applications can be referenced in the standard ANSI/HI 14.4 Rotodynamic Pumps for Installation, Operation, and Maintenance Manuals. Items used in the maintenance of pumping equipment include replacement packing, lubricant, cleaning materials, touch-up coating, anodic protection, coolant and mechanical seal barrier fluid.

For more information about these topics, refer to ANSI/HI 9.8 and ANSI/HI 14.4 at

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