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Cookson doors are recognized in the industry as being the easiest to operate. Premium ball bearings, balance designs, and precision construction ensure efficient, trouble-free use with minimal maintenance. Door size, building design and operational requirements should determine the operator type.
- Lifetime warranted Whisper Governor controls automatic closing speed of door to a range of 6" to 2' per second (used on all doors except Auto-Test model FDO-B)
- Oil tempered torsion springs designed for 50,000 life cycles
- Structural Angle Guides and Bottom Bar make doors less vulnerable to damage that could prevent the doors from fully closing
- Approved in all sizes Labeled doors up to 163 square feet not exceeding 13'-6" wide or 12'-0" high Oversize labels furnished on larger doors not exceeding 36'-6" wide or 24'-0" high
- Available for 4 hour, 3 hour, 1-1/2 hour and 3/4 hour ratings
- Approved for all wall types (concrete, masonry, structural steel, structural steel with gypsum board)
- Simple-Test Doors are reset from one side of opening reducing testing costs
- Sure-Close release spring on Simple-Test Doors increase reliability of automatic closings
- Auto-Test Doors do not require resetting
- Testing doors in fully closed position will not damage mechanisms
- Revolutionary Soft-Close RPM governing system limits automatic closing speed to a range of 6" to 9" per second (only available on Auto-Test model FDO-B)
- FinalCote finish
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