Round filter element, in particular for gas filtration

A filter device comprising:

• a filter housing;
• a round filter element comprising:
• a filter medium body comprising a wall structure configured to be flowed through by a fluid to be purified in a flow direction radially relative to a longitudinal axis of the filter medium body,
• the filter medium body comprising an elongate cross section shape;
• a seal support configured to support a sealing element,
• wherein the seal support is arranged adjacent to a radially outwardly positioned outer wall of the wall structure of the filter medium body and adjacent to a first end face of the filter medium body,
• wherein the seal support comprises, across a major portion of a circumference of the seal support, a constant radial spacing relative to the outer wall of the wall structure of the filter medium body,
• wherein the seal support comprises at least one radially inwardly oriented indentation with a reduced radial spacing relative to the outer wall of the wall structure of the filter medium body,
• wherein the at least one radially inwardly oriented indentation of the seal support is located at a longitudinal side of the filter medium body,
• wherein the seal support comprises a receiving groove configured to receive the sealing element,
• wherein the receiving groove comprises, in a region of the at least one radially inwardly oriented indentation, a reduced radial spacing relative to the outer wall of the wall structure of the filter medium body compared to a radial spacing of the receiving groove relative to the outer wall of the wall structure of the filter medium body in regions outside of the region of the at least one radially inwardly oriented indentation;
• wherein the filter housing is configured to receive the round filter element.