Control flap assembly for a gas flow in a fuel cell system

A control flap assembly for a gas flow in a fuel cell system, the control flap assembly comprising:

• a control flap housing defining a gas flow channel;
• a control flap having a disk-like control flap body and being adjustable in said control flap housing between a closed position preventing a gas flow through said gas flow channel and at least one open position opening up said gas flow channel for accommodating a gas flow therethrough;
• a control flap seat provided on said control flap housing;
• a sealing region arranged on said control flap to bear against said control flap seat in said closed position of said control flap;
• said control flap body having a first front face and a second front face facing away from said first front face and having an external peripheral region, said first front face being positioned obliquely from radially inwardly to radially outwardly in the direction of said second front face, such that a thickness of the control flap body between said first front face and said second front face reduces from radially inwardly to radially outwardly in said external peripheral region;
• said sealing region including resilient sealing material on said external peripheral region of said control flap body;
• at least one sealing material body made with said sealing material arranged on said external peripheral region of said control flap body such as to extend in an annular manner along at least one part of said external peripheral region of said control flap body;
• said at least one sealing material body including a first sealing material body portion arranged on said first front face and a second sealing material body portion arranged on said second front face, at least one sealing material connecting portion connecting said first sealing material body portion to said second sealing material body portion;
• and,
• said at least one sealing material body including at least one sealing lip extending along said external peripheral region of said control flap body at said first front face on said first sealing material body portion, said at least one sealing lip bearing against said control flap seat when said control flap is in said closed position.