(1) Change the speed of the pump by installing a frequency converter (applicable to most centrifugal pumps);
(2) Cutting the diameter of the impeller of the water pump (mainly suitable for centrifugal pumps with low specific speed);
(3) changing the number of water pump impellers (mainly for multistage centrifugal pumps);
(4) Control the opening of pump outlet valve (applicable to most centrifugal pumps).
The working principle of centrifugal pump is that the rotation of impeller causes centrifugal movement of water. Before starting the pump, the pump shell and suction pipe must be filled with water, and then the motor is started, so that the pump shaft drives the impeller and water to rotate at high speed, and the water is centrifugally moved, thrown to the outer edge of the impeller, and flows into the water pressure pipe of the pump through the flow channel of the volute pump shell.