Filter unit for filtering gaseous fluids

An air filter unit for filtration of gaseous fluids, comprising:

• a filter housing (9) having a longitudinal axis, said filter housing including a first housing part (10) including
• an axially extending first sealing stay (13), said sealing stay including a contact surface;
• a second housing part (11) including
• an axially extending second sealing stay (14) arranged radially outwardly of said first housing part (10) sealing stay (13), said second housing part (11) detachably joined to said first housing part in a mounting direction, said second sealing stay including a contact surface;
• a filter insert part (1) including a raw flow face and a clean flow face, said filter insert part (1) inserted into said housing (9), said filter insert part (1) including
• a filter medium (2);
• and
• a sealing element (3) arranged on a radial outer circumference of said filter medium at one of said flow faces, said sealing element extending radially outwardly from said outer circumference,
• said sealing element (3) secured to said filter medium;
• wherein said first housing part includes
• a connecting section (16) having a first end secured to an outwardly facing side of said sealing stay (13), said connecting section (16) extending radially outwardly from said sealing stay (13);
• a support stay (15) secured to an opposing second end of said connecting section (16), said sealing stay (13) with said connecting section (16) and said support stay (15) forming a U-shaped receiving space (17) surrounding an outer side of said first housing part (10);
• wherein said second sealing stay (14) of said second housing part (11) is receiving into said U-shaped receiving space (17);
• wherein said first sealing stay (13) separates an interior of said first housing part (10) from said U-shaped receiving space (17);
• wherein a portion of said sealing element (3) clamped between said contact surface of sealing stays (13, 14) of said housing parts (10,11) in said U-shaped receiving space (17);
• wherein said contact surfaces of radially spaced first and second sealing stays (13, 14) exert a clamping force radially compressing said sealing element (3), said clamping force extending approximately orthogonally to said mounting direction of said housing parts (10, 11).