A pump assembly, comprising: a rotating assembly having a rotor , a rotating sleeve positioned on one axial side of the rotor and a rotating fluid inlet positioned on the other axial side of the rotor , wherein the rotating fluid inlet is positioned to deliver fluid to said rotor along a defined central axis , said fluid inlet comprising a suction shaft ; a stationary pitot tube assembly having at least one pitot tube positioned within said rotor ; a fluid discharge having a central axis which is axially arranged with the defined central axis of said rotating fluid inlet , the fluid discharge being axially spaced from said fluid inlet in such a way, that it extends to the one axial side of the rotor; a drive mechanism connected to the rotating assembly to provide rotation of both said suction shaft and said rotating sleeve together as a result of the rotation of said rotor ; a suction seal housing portion of a pump housing , said suction shaft extends through said suction seal housing portion , the suction seal housing portion being arranged to provide an air gap in contact with a seal mechanism positioned in said suction seal housing portion ; and a bearing positioned about said suction shaft and an isolator plate positioned against said bearing , said isolator plate being held in position against the suction seal housing portion with a securement ring orientated toward said air gap and spaced from said seal mechanism positioned in said suction seal housing portion to isolate said bearing from said air gap , wherein said rotor is journalled between said rotating sleeve , which is supported by a further bearing positioned in the pump housing , and said suction shaft , which is supported by the bearing . a rotating assembly having a rotor , a rotating sleeve positioned on one axial side of the rotor and a rotating fluid inlet positioned on the other axial side of the rotor , wherein the rotating fluid inlet is positioned to deliver fluid to said rotor along a defined central axis , said fluid inlet comprising a suction shaft ; a stationary pitot tube assembly having at least one pitot tube positioned within said rotor ; a fluid discharge having a central axis which is axially arranged with the defined central axis of said rotating fluid inlet , the fluid discharge being axially spaced from said fluid inlet in such a way, that it extends to the one axial side of the rotor; a drive mechanism connected to the rotating assembly to provide rotation of both said suction shaft and said rotating sleeve together as a result of the rotation of said rotor ; a suction seal housing portion of a pump housing , said suction shaft extends through said suction seal housing portion , the suction seal housing portion being arranged to provide an air gap in contact with a seal mechanism positioned in said suction seal housing portion ; and a bearing positioned about said suction shaft and an isolator plate positioned against said bearing , said isolator plate being held in position against the suction seal housing portion with a securement ring orientated toward said air gap and spaced from said seal mechanism positioned in said suction seal housing portion to isolate said bearing from said air gap , wherein said rotor is journalled between said rotating sleeve , which is supported by a further bearing positioned in the pump housing , and said suction shaft , which is supported by the bearing . <EOS>