Opposed Blade Volume Damper 3000-0BD-54X42 Step Down Ceiling Diffuser 450 Series Engineering/Performance Data

450 Series Engineering/Performance Data

Galvanized Finish

Standard Features * Individually adjustable curved blade T-Bar lay in diffuser with concealed hinges * Hinged perforated face * Spring push release for easy access to adjust curved blades * 2x2 galvaneal steel panel with seismic support hangers * Round No Labor Collar sizes: 6-10"

For damper free area chart B click here * 2565 - Round fire door for vertical mount only

Opposed Blade Volume Damper 3000-0BD-54X42 Step Down Ceiling Diffuser 450 Series Engineering/Performance Datah3. 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.