During a recent service call, several horizontal centrifugal pumps of various designs were overhauled, including single-stage split-case pumps, split-case process pumps, double-suction volute pumps and multistage high-pressure pumps. The focus was on replacing mechanical seals and bearings, as well as inspecting impellers, shafts and seal chambers for wear and damage.

In units with high operating hours, even minor changes to bearings or sealing systems can lead to increased vibration levels, leaks, or unplanned downtime. This is why maintenance windows are utilised specifically to identify and address potential weak points early on. Multistage high-pressure pumps and double-flow process pumps require particular attention. Adherence to tight tolerances, monitoring of rotor geometry, and correct alignment of the assemblies are crucial here for reliable operation after recommissioning.

For operators of power plants, process plants or energy generation facilities, such measures are essential for ensuring plant availability. Planned maintenance reduces the risk of unplanned outages and enables cost-effective operation throughout the next maintenance period.