The most important feature of this damper is gears position: they are placed inside and hidden in the frame. As a result, the damper is always clean from dirt and the rotation of blades is guaranteed for long time. The assembly is very quick and easy; it is possible to make dampers of different sizes: from small to big dimensions. This damper can reach, in term of air tightness, class 2 or 3 (EN UNI 1751:2013) thanks to its accessories and gaskets. This system, offers a range of profiles of different weights and sizes, in order to assemble various kind of dampers in term of cost, resistance and air tightness.

1. Frame and blades made with Aluminium extruded profiles, EN AW 6060 T6 alloy
2. PA 6 reinforced glass fiber hidden gears
3. EPDM gaskets
4. Die-casted Aluminium spindle (12x12mm square)
5. Die-casted Aluminium handle for air flow regulation