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Ships within 48 hours · Estimated delivery Aug 19 - Aug 24
available 4" through 40" round (2549)
Countersunk mounting holes with color matching Phillips Pozidriv screws
UL listed and tested in accordance with UL Standard 555C
Recommended Minimum Sleeve Thickness for Fire Dampers
Standard Features * 2661 - Square or rectangular fire door for vertical mount only
Volume Damper Low-Leak OBD 3000-0BDLL-20X16 Accessories available 4" through 40" roundh3. 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.
