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4-way reversible door on square sizes
855 Series Submittal
Designed for protection of ceiling openings in fire rated floor/ceiling assemblies with fire resistance ratings of 3 hours or less
2550 Series Submittal
Options 14 GA 304 SS Construction
Volume Damper Low-Leak OBD 3000-0BDLL-56X46 Commercial 4-way reversible door on squareh3. 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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