Here Centrifugal the pump will only deliver one specific flow rate. Therefore, to control the flow of a centrifugal pump, simply set the output pressure to the point on the P-V diagram that allows the pump to deliver the desired flow rate. The output pressure of the pump is set using a back pressure regulator.Fluid enters the rapidly rotating impeller along its axis and is cast out by centrifugal force along its circumference through the impeller's vane tips. Reducing the speed of a centrifugal pump reduces the pump discharge pressure by the square of its speed. Therefore, the discharge pressure will be approximately 64 percent of the full speed discharge pressure when the pump is operated at 80 percent of speed. for more download this file.
