Multi-stage vertically suspended pumps with bowl type diffuser. The top antifriction bearing is lubricated by oil. The bottom sliding bearing is multi-point supported. The first stage impeller can be single or double suction. It also can be lower arranged. The axial force is efficient balanced by balance drum which can not be impacted by axial position. Structure design has thought-out and mature consideration on support, connection, bearing cooling, etc. Sorts of available auxiliary and monitoring instruments make it high safety and reliability.
