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850 Series Submittal
Standard Features * For large volume air delivery * For evaporative coolers or central blower systems * Adjustable directional dampers with shut-off * Countersunk mounting holes for flush appearance with color matching Phillips posi-drive screws * Soft White
3/4" round collar
Extruded aluminum frame with signature line marks
round collar only) * 830 OR - factory installed opposed radial damper (sizes 6"-14") * 830 FR - U
Opposed Blade Volume Damper 3000-0BD-66X30 Smoke-Fire Damper 850 Series Submittalh3. Standard Features * Opposed blade operation for precise volume control * 16 gauge galvanized channel frame * Blades are vee stiffened 16 gauge galvanized for strength and stability * Blades pivot on non metallic celcon bushings * 1 2" square zinc plated steel pivot pins * 1 2" square zinc plated steel adjustable operating shaft extending up to 4" beyond the air control frame * Single blades on dampers with a height of 12" or less * Mill finish h3.
