Centrifugal pumps use a rotodynamic principle, most commonly employing an impeller rotating at a high frequency to enact a 'radial' or an 'axial' flow pattern.
A conventional centrifugal pump provides a very efficient method of moving fluids in large volume, typically with a low viscosity and medium to small solids, though models are available for handling more difficult fluids.
Once the pump is in operation and running at the BEP (best efficiency point) the pump uses a low degree of energy for transferring higher flow rates in comparison to a positive displacement pump.
At the heart of the centrifugal pump is the impeller, the component which transfers the energy from the motor drive into the fluid. Impellers are available in many configurations including shrouded, open and screw-type. The variation allows different fluids to be handled from water-thin, clean fluids through to handling larger solids such as potatoes or slurry suspensions such as liquid lime chemical for water treatment.
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