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Smoke Test and More Information on MA Series Diffusers
Countersunk mounting holes for flush appearance with color matching Phillips Pozidriv screws
102 - two way
Standard Features * 2561 - Square or rectangular fire door for vertical mount only
Holds up to a 4" filter (not included) with filter retention tabs (FG4)
Volume Damper Low-Leak OBD 3000-0BDLL-40X20 Smoke-Fire Damper Smoke Test and More Informationh3. 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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