A centrifugal pump, of the submersed or submersible type, includes a hydraulic part, with a hollow body inside which there is at least one impeller, a motor enclosed within a motor casing that isolates the motor from the pumping liquid, adapted to drive the impeller in rotation via a rotation transmission shaft. The centrifugal pump further includes an open compartment that spaces the motor casing from the hollow body that contains the at least one impeller and hydraulic sealing elements between the open compartment and the motor casing.