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Lever operated Multi-Shutter Damper
3/4" round collar
Spiral Diffuser Radius Flush Mount Diffuser Single Deflection with Damper
One piece steel frame
floors and partitions with fire resistance ratings of 2 hours or less (for ceiling application
Opposed Blade Volume Damper 3000-0BD-36X28 Step Down Ceiling Diffuser Lever operated Multi-Shutter Damperh3. 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.
