It is mainly based on pressure difference and centrifugal force. When the double-suction pump starts working, both of its inlets will form a negative pressure area, and the liquid will be driven by the pressure difference to flow from the supply system to the pump's suction inlet. The liquid enters the pump's cavity through the suction inlet, and the pump's rotor begins to rotate. The rotor usually consists of an impeller and a shaft, with the impeller serving the function of liquid transfer. As the rotor rotates, the liquid is pushed to the pump's outlet, and the rotation of the rotor generates centrifugal force, pushing the liquid towards the outlet and increasing the liquid's pressure. When the liquid is pressed into the outlet, the pump will discharge it into the corresponding pipeline or container.