Rotary pressure filter

A rotary pressure filter suitable for use in treatment of medical products or foodstuffs, the rotary pressure filter comprising:

• a filter drum that can be rotated about an axis of rotation;
• a plurality of filter cells arranged along an outer circumference of the filter drum;
• a housing surrounding the filter drum, wherein a process space is formed between the filter drum and the housing;
• and
• at least one separating element dividing the process space into a plurality of treatment zones, wherein at least one treatment zone is associated with a housing connector via which one or more of a fluid or a suspension can be introduced into the respective treatment zone,
• wherein at least one separating element separates the treatment zones from one another in a gas-tight manner,
• wherein the at least one separating element is configured to prevent a permanent accumulation of fluid in a region of the separating element,
• wherein the filter drum is sealed relative to the housing such that the one or more of the fluid or the suspension from at least one treatment zone is substantially prevented from exiting the at least one treatment zone other than through filter cells located in the treatment zone, and such that a permanent accumulation of the one or more of fluid or suspension in a region of a transition between filter drum and the housing is prevented, and
• wherein a hollow element which can be filled with a second fluid is arranged adjacent to at least one of the separating elements in a direction parallel to the axis of rotation of the filter drum, wherein the hollow element is designed to close a gap between said hollow element and the separating element by filling the hollow element.