Opposed Blade Volume Damper 3000-0BD-72X20 Residential Registers & Grilles Stamped from cold roll steel

Stamped from cold roll steel

floors and partitions with fire resistance ratings of 2 hours or less (for ceiling application

Opposed Blade Damper standard on 4" widths

Available 6

All steel construction

Opposed Blade Volume Damper 3000-0BD-72X20 Residential Registers & Grilles Stamped from cold roll steelh3. 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.