What is the main purpose of a wear ring in a centrifugal pump?

The primary role of a wear ring in a centrifugal pump is to seal the inlet from the outlet. This component helps to minimize the leakage of fluid between the pump's impeller and the casing. By doing so, it maintains the efficiency of the pump by ensuring that the fluid is directed correctly through the pump rather than allowing it to bypass the impeller. This sealing action is crucial in preserving the performance and efficacy of the pump in achieving the desired flow rates and pressures.

Wear rings also play a role in extending the operational life of the pump by providing a replaceable surface that encounters wear rather than the more expensive components of the pump itself, such as the impeller or casing. This is important in maintaining pump integrity and efficiency over time.