The AIR-TIGHT sectional overhead door is lifted by the hydraulic Fidelity mechanism that eliminates the balancing springs, and consequently all periodical maintenance changes in a simple inspection. The Fidelity system grants that the whole weight of the door leaf is in contact by the gravity force, without any balancing. This natural force allows a contemporary compression of the whole door when closing, against the perimeter sealings and the bottom astragal, assuring in this way the Air Tightness.
The AIR-TIGHT performances are those of granting a limited passage of air through the door, at closed door.
- POWER SUPPLY
Threephased feeding 230-400V, 50/60 Hz, 0,75-1,1kW.