Shutters closed elements constructed with double steel preplasticized or pre-painted aluminum, with internal insulation in polyurethane foam. The surfaces of the dampers are supplied fully assembled, equipped with nylon side slat stop skid, onshore terminal in extruded aluminum with gasket, painted to match. The side rails are made of extruded aluminum section 40x36x40 and 60x36x60 with brush seals and flags or support shaft galvanized. Optionally you can insert windows short or long, with or without plexiglass.
The winding shaft is to springs or round or octagonal with tubular motor, and also rotating without springs for industrial use. The shutters can be operated manually or with insulated motor. They differ from the dampers generally to the ability to provide a high thermal and acoustic insulation, are suitable for the protection of private garages and industrial medium sized holes or where there is a need to divide environments requiring thermal stability.
It 'also possible the realization of dampers blind or windowed P 77 in extruded aluminum with standard supply equal to the insulated.