Fire Doors   LIRTEK Fire Doors are a convenient and practical solution to safety and protection. They built to save lives, property and money as well. They designed to accommodate optional operation methods including powered closing and testing.  The fire door system drops the door instantly at fire alarm. Original counterbalance spring tension is maintained up to 85% after automatic closure. So if the door raised for any reason, it will automatically closed again. Safety governor retards the speed of automatic closing and signals an alert with an audible warning during the closing cycle.   Features UL-Labeled 3-Hour Protection Automatic Reclosure Governor-Controlled Closing Speed minimizes possibility of accidents and prevents impact on sills,     rebound or jamming of slats 51mm or 76 mm width panel thickness Size alternatives up to 7300mm width and 7300mm heightng safety device   Options  Fire door release system can be connected with the buildings' fire alarm systems. Optional vision slats for situations where visibility and/or light are required.