Fully sealed.
Airtight doors are used in ventilation systems, machine rooms and storage rooms, filter chambers etc. The Auroport doors for such special purposes consists of a stable, galvanised hollow-section steel frame and a 40-mm thick galvanised panel with CFC-free hard PU foam core, fire protection class B2. If required, portholes and pressure equalising flaps can be incorporated. Special hinges provide for adjustment of the pressure on the rubber seal.
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