Volume Damper Low-Leak OBD 3000-0BDLL-34X28 Smoke-Fire Damper Designed to minimize vision into

Designed to minimize vision into the air duct

1x1 T-Bar (10" x 10" duct)

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alternate frame is extruded aluminum with signature line marks

Volume Damper Low-Leak OBD 3000-0BDLL-34X28 Smoke-Fire Damper Designed to minimize vision intoh3. 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.