What is the main purpose of wear rings in pumps?

The main purpose of wear rings in pumps is to protect the impeller and volute from wear caused by the continuous movement of fluid. Wear rings create a controlled clearance between the rotating impeller and the stationary volute, which helps to maintain efficiency while minimizing leakage and reducing the wear on these critical components.

By doing so, wear rings maintain the hydraulic performance of the pump, ensuring that it operates effectively over time. This is crucial because wear on the impeller or volute can lead to reduced performance, increased maintenance costs, and potential pump failure. Therefore, wear rings play a vital role in extending the life of the pump and ensuring its reliable operation.