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Ships within 48 hours · Estimated delivery Aug 29 - Sep 3
" Spiral pipe diameter must be 4” larger than width of grille
Blade lock to secure blades once the product is activated
Accessory to the 90 Series
For damper free area chart A click here * 2663 - Out-of-Airstream fire door
Opposed Blade Volume Damper 3000-0BD-44X22 Specialty Products " Spiral pipe diameter musth3. 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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