Submersible pump is a water lifting equipment that integrates machine and pump, and can work completely immersed in liquid. Its core advantages are that it does not require additional water intake, occupies a small area, and can efficiently solve the liquid transportation needs of deep well water lifting, water accumulation drainage and other scenarios. 1、 Core classification and applicable scenarios According to their purpose and structure, mainstream submersible pumps can be divided into two categories, adapted to different needs: -Submersible water pump: designed specifically for delivering clean water without impurities, commonly used for household deep well water intake, farmland irrigation, fish tank water circulation, and some high lift models can be used for secondary water supply in high-rise buildings. -Submersible sewage pump: The pump body is equipped with a cutting blade or a large channel impeller, which can transport sewage containing impurities such as fibers and sludge. It is widely used for household basement drainage, community sewage treatment, and construction site precipitation. 2、 Key Performance and Characteristics 1. Strong self-priming ability: There is no need to add water in advance like a centrifugal pump, and it can be started to pump water, especially suitable for "underwater operations" such as deep wells and pools. 2. High protection level: The motor casing is mostly IPX8 waterproof (the highest waterproof level), which can be immersed in water for a long time, avoiding the risk of leakage, and has better safety than ordinary water pumps. 3. Flexible installation: The volume is relatively compact, and it can be directly suspended in water or fixed underwater through cables and pipelines, without the need for complex ground equipment rooms, saving space. 3、 Precautions for use -It is strictly prohibited to operate without load: it must be completely immersed in liquid to work, otherwise it may burn out due to poor heat dissipation of the motor. -Matching medium type: The clean water pump cannot pump sewage, and the corresponding model of the sewage pump should be selected according to the particle size of impurities to avoid clogging the impeller.