A control damper for a housing of an air-handling unit includes a rigid main body rotatable about a first rotational axis. A sealing element extends radially outwardly from a first side of the rigid main body. The sealing element is formed of a resilient material. The sealing element further includes a resilient lip extending outwardly from a distal end thereof. The lip has a first series of undulations formed in an outer edge thereof, wherein the undulations form a wave-shaped profile in the outer edge of the lip.

An electric generator for an aircraft includes a sealed casing, a rotating shaft, and a ventilation device, which has at least one orifice configured to place a chamber positioned inside the rotating shaft in communication with the exterior of the sealed casing. For at least one orifice, an inertia sealing system is configured to occupy an open state when the speed of rotation of the rotating shaft is below a given threshold, in which state the sealing system is spaced from the orifice, and a closed state when the speed of rotation of the rotating shaft is above the given threshold, in which state the sealing system seals the orifice.

An exhaust gas flow regulator and a heat recovery steam generator including the same are provided. The exhaust gas flow regulator includes a plurality of first tubes spaced apart from each other in a vertical direction, a support plate disposed in a direction perpendicular to the extension direction of the first tubes and through which the plurality of first tubes penetrates, and a second tube disposed at one or both ends of the support plate so as to be coupled to the support plate and extending parallel to the first tubes, wherein the second tube is provided with a guide plate disposed to redirect exhaust gases flowing adjacent to the second tube toward the first tube.

Device for admitting cooling air to a motor vehicle interior, formed of one or several mobile flaps, each orientable in rotation about an axis by a control mechanism, each flap includes on its external periphery a pressing surface intended, when the mobile flap is in the closed position, to come into contact with a bearing surface. The pressing surface has a point of first contact and a point of last contact with the said bearing surface, these points being defined in such a way that when the control mechanism actuates closure of the mobile flaps and the point of first contact comes into contact with the said bearing surface, the point of last contact is distant from the said bearing surface by a predefined and non-zero distance.

An electric generator for an aircraft includes a sealed casing, a rotating shaft, and a ventilation device, which has at least one orifice configured to place a chamber positioned inside the rotating shaft in communication with the exterior of the sealed casing. For at least one orifice, an inertia sealing system is configured to occupy an open state when the speed of rotation of the rotating shaft is below a given threshold, in which state the sealing system is spaced from the orifice, and a closed state when the speed of rotation of the rotating shaft is above the given threshold, in which state the sealing system seals the orifice.

A gas flow control valve with pivotable damper blade usable in a regenerative thermal oxidizer (RTO) unit or other gas flow control application. The valve in one embodiment is a four-way valve with dual operating positions to control gas flow through four ducts coupled to the valve. To enhance positively sealing the blade to the valve housing in each position the seal, selectively actuatable electromagnetic clamps are provided which magnetically draw the blade toward the active blade end seat acted upon by gas pressure in a direction which tends to force the blade away from its seat. The blade is actuated directly by an actuator system via an operating rod to change position of the valve. A seal air system supplies pressurized air to the valve seats. A programmable controller automatically controls actuation of the electromagnets, seal air, and blade positional changes.