There are several types of submersible pumps, and the wire packs in the motor are oil-immersed and water-immersed, as well as dry.

You must read the instruction manual before use. You can't make mistakes. If you don't use it for a long time, you must turn the impeller before use. Otherwise, you will burn it because you don't need to be stuck for a long time. Before starting the pump, the suction pipe and the pump must be filled with liquid. After the pump is turned on, the impeller rotates at high speed, and the liquid in it rotates along with the blades. Under the action of centrifugal force, it flies away from the impeller and shoots out. The speed of the ejected liquid in the diffusion chamber of the pump casing gradually slows down, and the pressure gradually increases. Outlet, discharge pipe outflow. At this time, because the liquid at the center of the blade is thrown to the surroundings, a vacuum low-pressure area is formed that is neither air nor liquid. The liquid in the liquid pool flows into the pump through the suction pipe under the action of the atmospheric pressure of the pool surface. It is continuously sucked up from the liquid pool and continuously flows out from the discharge pipe.