It integrates the inner-mounted stainless steel impeller structure into a whole. It uses single (three)phase power source. The sealing part ad- opts the special material with the strong anti-corrosiveness (PH value 4 ~ 10). It features as little noise, long service life. It is mainly applicable for the national water-saving trickle irrigation, sprinkler irrigation, micro- irrigation projects. It is also used in the deep water source, high-rise dr- inking water supply, purifying machinery etc.