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How To Order Spirals
Ceiling opening must be 4” larger in length and width than the nominal duct size
Options * 3000 OBDLL - Low Leak Air Control Damper
Standard Features * 2649 - Round damper for vertical mount only
with 75% free area Options 14 GA 304 SS Construction 12 GA (
Opposed Blade Volume Damper 3000-0BD-52X38 T-Bar How To Order Spiralsh3. 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.
US$ 130.49
US$ 35.00
US$ 160.00
