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floors and partitions with fire resistance ratings of 2 hours or less (for ceiling application
REVIT FILES T-Bar Modular Core Diffuser with Round Collar 16
*Note: Ceramic fiber blade insulation is not UL required on dampers with free areas less than 80 square inches
linkage and handle enclosed in valve to assure trouble-free operation
Airfoil blades individually adjustable on 3/4" centers
Opposed Blade Volume Damper 3000-0BD-70X54 Specialty Products floors and partitions with fireh3. 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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