In a centrifugal pump with a closed impeller, internal leakage is primarily restricted by what component?

In a centrifugal pump with a closed impeller, internal leakage is primarily restricted by what component?

• A. Sealing gaskets
• B. Wear rings
• C. Mechanical seals
• D. Impeller design

Answer: (B)

In a centrifugal pump with a closed impeller, internal leakage is primarily restricted by wear rings. Wear rings are designed to create a tight clearance between the impeller and the stationary part of the pump, typically the volute or diffuser. This tight fit is crucial for minimizing internal leakage, which can lead to reduced efficiency and performance of the pump. By limiting the amount of liquid that can leak back from the discharge side to the suction side of the pump, wear rings help maintain the hydraulic performance and pressure of the pumped fluid. While sealing gaskets and mechanical seals are important for preventing external leakage and ensuring that fluid does not escape from the pump housing, they do not directly address the internal leakage that typically occurs within the impeller and volute. Impeller design also plays a role in how fluid flows through the pump but is not specifically intended to restrict leakage in the same way that wear rings do. Therefore, the primary component that addresses the issue of internal leakage in a centrifugal pump with a closed impeller is indeed the wear rings.

In a centrifugal pump with a closed impeller, internal leakage is primarily restricted by wear rings. Wear rings are designed to create a tight clearance between the impeller and the stationary part of the pump, typically the volute or diffuser. This tight fit is crucial for minimizing internal leakage, which can lead to reduced efficiency and performance of the pump. By limiting the amount of liquid that can leak back from the discharge side to the suction side of the pump, wear rings help maintain the hydraulic performance and pressure of the pumped fluid.

While sealing gaskets and mechanical seals are important for preventing external leakage and ensuring that fluid does not escape from the pump housing, they do not directly address the internal leakage that typically occurs within the impeller and volute. Impeller design also plays a role in how fluid flows through the pump but is not specifically intended to restrict leakage in the same way that wear rings do. Therefore, the primary component that addresses the issue of internal leakage in a centrifugal pump with a closed impeller is indeed the wear rings.