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Ships within 48 hours · Estimated delivery Aug 24 - Aug 29
Spiral pipe diameter must be 4” larger than the width of the grille
For evaporative cooling or high velocity exhaust applications
Square collar designed for 20” × 20” duct
Performance Data With Opposed Blade Damper
*Pricing is based on standard 14 GA steel construction
Opposed Blade Volume Damper 3000-0BD-60X46 Commercial Spiral pipe diameter must beh3. 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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