In some pump models the diffuser and the volute are designed as a single part. A measure of the amount of pressure or resistance in a hydraulic system. A circular pump part with canes that rotate to provide centrifugal force for propelling water in the circulation system. The impeller spins on the end of the electric motor shaft and is the only moving part of a centrifugal pump. Closed , semi-open or open impellers are used.
Water enters the eye and is centrifugally forced out the end of the closed impeller.
A pump impeller with exposed vanes like a water wheel. The curve on a bar graph that shows the performance characteristics of a pump. Variables include size, flow rate and resistance. A centrifugal pump that automatically removes air from the suction line and replenishes itself with water from within the pump, permitting uninterrupted water flow. In comparison, a flooded centrifugal pump would require manual priming, if air interrupted the flow of water through the pump.