Driven by the motor. Before starting the pump, the pump body and the suction line are filled with liquid. When the impeller rotates at high speed, the impeller drives the liquid between the blades to rotate together.

Due to the centrifugal force, the liquid is thrown from the center of the impeller to the outer edge of the impeller, and the kinetic energy increases accordingly.

When the liquid enters the pump casing, the follow rate of the liquid gradually decreases due to the gradual expansion of the flow path in the volute-shaped pump casing.

Part of the kinetic energy is converted into static pressure energy, so the liquid flows out along the discharge port with a higher pressure.

At the same time, a certain vacuum is formed at the center of the impeller because the liquid is thrown out, and the pressure at the liquid level is higher than the center of the impeller.

Therefore, the liquid in the suction line enters the pump under the effect of the pressure difference.

The impeller rotates continuously, and the liquid is continuously sucked in and out.

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