1. During operation, the sealing device has no friction and damage, and its service life is more than 10 times longer than that of similar products.

2. Transplantation of vacuum pump principle, self-priming performance is stable and reliable, especially the use of "electric air control valve", truly achieve "once drainage, life-long self-priming".

3. It has the advantages of small vibration, low noise, flexible movement, easy disassembly, easy installation and no need of anchor fixation.

4. With superior automatic control function, it can be used with high-tech field and high automation system.

Sewage pump is a kind of centrifugal impurity pump, which has many forms: submersible pump and dry pump. The most commonly used submersible pump is QW submersible sewage pump, and the most common dry sewage pump is W-type horizontal sewage pump and WL vertical sewage pump. It is mainly used to transport urban sewage, feces or liquid containing fiber. Paper scraps and other solid particles of the medium, usually the temperature of the medium is not greater than 80 ℃. Because the medium to be transported contains fibers which are easy to be wound or bunched. Therefore, the flow channel of this kind of pump is easy to be blocked. Once the pump is blocked, the pump can not work normally, or even burn the motor, resulting in poor sewage discharge. It has a serious impact on urban life and environmental protection. Therefore, anti clogging and reliability are the important factors of sewage pump.