Volume Damper Low-Leak OBD 3000-0BDLL-44X42 Accessories Building materials rated 3 hours

Building materials rated 3 hours or less

round collar only) * 830 OR - factory installed opposed radial damper (sizes 6"-14") * 830 FR - U

with 53% free area

Driftwood Tan

For evaporative coolers or central blower systems

Volume Damper Low-Leak OBD 3000-0BDLL-44X42 Accessories Building materials rated 3 hoursh3. 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.