Rotary pressure filter suitable for use in the treatment of medical products and/or foodstuffs, wherein the rotary pressure filter comprises: a filter drum which is rotatable about an axis of rotation, a plurality of filter cells which are arranged on the filter drum along an outer circumference thereof, a housing which surrounds the filter drum, wherein a process space is formed between the filter drum and the housing, and at least one separating element which divides the process space into a plurality of treatment zones, wherein there is associated with at least one treatment zone a housing connector via which fluid and/or suspension can be introduced into the respective treatment zone, wherein the treatment zones are separated from one another in such a manner that fluid/suspension is substantially prevented from passing from one treatment zone into an adjacent, according to a rotation of the filter drum, treatment zone, wherein the at least one separating element is designed to prevent a permanent accumulation of fluid in the region of the separating element, wherein the filter drum is sealed with respect to the housing in such a manner that fluid/suspension of at least one treatment zone is substantially prevented from leaving the corresponding treatment zone other than through filter cells located in the treatment zone, and that a permanent accumulation of fluid/suspension in the region of a transition between the filter drum and the housing is prevented, characterised in that a resilient hollow element which can be filled with a fluid is arranged adjacent to at least one of the separating elements, in particular adjacent to all the separating elements, in a direction parallel to the axis of rotation of the filter drum, in particular on both sides, which hollow element is adapted, by filling of the hollow element, to close a gap between the respective hollow element and the separating element. a filter drum which is rotatable about an axis of rotation, a plurality of filter cells which are arranged on the filter drum along an outer circumference thereof, a housing which surrounds the filter drum, wherein a process space is formed between the filter drum and the housing, and at least one separating element which divides the process space into a plurality of treatment zones, wherein there is associated with at least one treatment zone a housing connector via which fluid and/or suspension can be introduced into the respective treatment zone, wherein the treatment zones are separated from one another in such a manner that fluid/suspension is substantially prevented from passing from one treatment zone into an adjacent, according to a rotation of the filter drum, treatment zone, wherein the at least one separating element is designed to prevent a permanent accumulation of fluid in the region of the separating element, wherein the filter drum is sealed with respect to the housing in such a manner that fluid/suspension of at least one treatment zone is substantially prevented from leaving the corresponding treatment zone other than through filter cells located in the treatment zone, and that a permanent accumulation of fluid/suspension in the region of a transition between the filter drum and the housing is prevented, characterised in that a resilient hollow element which can be filled with a fluid is arranged adjacent to at least one of the separating elements, in particular adjacent to all the separating elements, in a direction parallel to the axis of rotation of the filter drum, in particular on both sides, which hollow element is adapted, by filling of the hollow element, to close a gap between the respective hollow element and the separating element.