Filter Device Together with a Filter Element Which Can Be Accommodated Therein, and Method for Operating Such a Filter Element Together with a Device

A filter device having a filter housing, which filter housing has an inlet for unfiltered medium and an outlet for filtrate and which accommodates a replaceable filter element;

• wherein when unfiltered medium flows through said filter element from outside to inside, the unfiltered medium flows through both, a hollow cylindrical element material and an element material, which element material closes off said hollow cylindrical element material at one free end;
• wherein at the other free end of the hollow cylindrical element material, an element cap with a central recess is provided to discharge filtrate to the outlet in the filter housing which outlet is connected to the central recess;
• and wherein the respective element material is accommodated seal-free in the filter housing for incident flow on all sides, from outside to inside.

A filter element having a hollow cylindrical element material which is provided on a first free end face with an element material, which element material closes off the hollow cylindrical element material, wherein the respective element material consists at least partly of cellulose material.