Centrifugal multistage pumps with stainless steel housing, with vertical delivery branch. The motor is cooled by the pumped water passing between the motor housing and the outer housing. Double shaft seal in the oil chamber for reliable protection of the motor from water and for protection against dry running. Built-in capacitor. Insulation class "F". Protection IP X8 (for continuous operation in immersed condition). Winding is dry with double impregnation, resistant to moisture. Design in accordance with standard EN 60 335-2-44.