The injected liquid gradually slows down in the pump casing diffusion chamber, the pressure gradually increases, and then is discharged from the outlet pipe.

As the name suggests, a submersible pump is a pump that operates within a submersible device, and it is one of the widely used pump products. Compared to other pump products, it can operate underwater. Before use, the suction pipe and pump body must be filled with liquid. After the pump starts, the impeller rotates at high speed, and the liquid rotates with the impeller. Under the action of centrifugal force, the injected liquid flies off the impeller and is ejected.

The injected liquid gradually slows down in the diffusion chamber of the pump casing, and the pressure gradually increases, then it is discharged from the outlet pipe. Because the liquid is thrown around, a vacuum low-pressure zone without air or liquid is formed, causing the liquid to flow into the submersible pump under the action of atmospheric pressure on the pool surface, and continuously sucked up and discharged from the water outlet pipe. It is a widely used water treatment tool, and its presence can be seen in agricultural production and industrial processing.

The working condition of a small submersible electric pump is that the pump and motor are submerged in water together. After the water pump is energized, pressurized water flows out from the water outlet pipe. The water outlet of the submersible pump is equipped with a circular elbow to buffer the water resistance. Submersible pumps are different from traditional horizontal and vertical pumps used on land. Compared with them, small submersible electric pumps have the following advantages:

1. Simplified structure and small size. It requires the entire potential water volume to operate, so it is not necessary to add extra workshops. In this case, it is not necessary to build a special pump room for installation, which can save a lot of economic expenses.

2. Easy to operate, install, and maintain. Small submersible electric pumps are submerged in water, the installation location is very large, and there is no restriction. Slightly heavier submersible electric pumps are equipped with automatic lifting and connecting devices, making them very convenient to move.

3. Can work stably for a long time. Small submersible electric pumps have a special structure, with the pump and motor coaxial, short shaft diameter, light weight of the rotor components, and do not need to bear too much axial force during operation, and have a longer service life than other pumps;

4. Because it works underwater, it is fully enclosed, will not be damaged by cavitation, and does not require irrigation and water diversion, which is very convenient.

5. There is almost no vibration and noise, and the unit temperature rise is very small. When working in water, there is no need to consider cooling issues;

Due to its excellent performance, small submersible electric pumps are widely used in the fields of domestic sewage discharge, factory sewage discharge, mine sewage discharge, and water conservancy projects. However, when selecting a model, special attention should be paid to the model, flow rate, and lift. If the model is not selected properly, it will not be able to meet the work requirements, nor will it be able to exert the efficiency of the unit. In addition, it is necessary to clarify the direction of rotation. Although many models can discharge water in both forward and reverse rotation, the discharge volume will be very small when reversed, and sometimes even the motor windings will be damaged.