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Square collar designed for 20” × 20” duct
Installation Instructions * UL approved installation instructions
2x4 T-Bar (22" x 46" duct)
1 for each end)
Reinforced welded core and extra supports for heavy duty application
Opposed Blade Volume Damper 3000-0BD-42X24 T-Bar Square collar designed for 20”h3. 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.
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