Abstract: This device (D) for regulating the air flow in a pipe includes a flap (6) delimiting, relative to an inner surface (104) of a pipe (10) of the device (D), an air passage section (S), and an adjusting calibrating element (8) movable between a first position and a second position. The device includes a sealing wall (12), extending between the calibrating element and an inner surface (106) of the duct (10), suitable for preventing the passage of air from the side of the duct (10) opposite the air passage section (S). The sealing wall (12) is rotatable relative to the pipe (10) under the action of the movement of the calibrating element, and the calibrating element includes a front wall (86) perpendicular to the longitudinal axis (X-X?) of the duct (10) which, in the first position of the calibrating element, does not protrude past the circumference of the duct.

Abstract: This device (D) for regulating the air flow in a pipe includes a flap (6) delimiting, relative to an inner surface (104) of a pipe (10) of the device (D), an air passage section (S), and an adjusting calibrating element (8) movable between a first position and a second position. The device includes a sealing wall (12), extending between the calibrating element and an inner surface (106) of the duct (10), suitable for preventing the passage of air from the side of the duct (10) opposite the air passage section (S). The sealing wall (12) is rotatable relative to the pipe (10) under the action of the movement of the calibrating element, and the calibrating element includes a front wall (86) perpendicular to the longitudinal axis (X-X?) of the duct (10) which, in the first position of the calibrating element, does not protrude past the circumference of the duct.