Bpz series self-sucking pump is a self-sucking centrfugal pump, it has special structure mixing inside and rlowing outside, electric motor is not directly linked with the pumps with high efficiency, good self-sucking performance, small size and convenient installation and operation, it can be widely used in agricultural fidleirrigation and drainage, spray irrigation, smelting and stone material manuffctur-ingfield, also it is applicable to use, especially in supplying and drain-ing in ffctorymining area, drinking of city living, fire fighting and high pressure washing, etc.