Shutter for the end of an air duct in a heating or air-conditioning system of a motor vehicle

The present invention relates to a shutter valve (1) for a heating or air conditioning system of a motor vehicle, said shutter valve (1) comprising a sealing surface (3) intended to rotate around a rotation axis (A), said shutter valve (1) being intended to be placed within a housing (20), said shutter valve (1) further comprising: - a first end (5a) of the sealing surface (3), said first end (5a) comprising a pivot connection between the shutter valve (1) and the rotation axis (1), - a second end (5b) of the sealing surface (3) comprising a sliding connection with a wall (21b) of the housing (20).