A centrifugal pump housing

A centrifugal pump housing configured to accommodate an impeller mounted on an axially extending drive shaft operably connected to a motor for rotation of the impeller, the pump housing comprising:

• a rear housing part having a drive shaft opening,
• a front housing part attachable to the rear housing part for forming a pump chamber, and
• a sealing arrangement for sealing the drive shaft opening, wherein the sealing arrangement comprises:
• a stationary annular seal element rotationally locked to the rear housing part or to a sealing retainer mounted in the rear housing part, wherein the stationary annular seal element has a stationary plane seal surface facing forwards in the axial direction, and
• a rotatable annular seal element configured to be rotationally locked to the impeller or to the drive shaft, wherein the rotatable annular seal element has a rotatable plane seal surface facing rearwards in the axial direction and configured to sealingly abut against the stationary plane seal surface, and wherein the pump housing further comprises a plurality of stationary protrusions integrally formed in the rear housing part or in the sealing retainer, wherein the plurality of stationary protrusions are located in or adjacent the drive shaft opening of the rear housing part for increasing the turbulence of a flow of product fluid in the pump housing adjacent to the sealing arrangement.