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Double deflection transition box mount spiral pipe grille
Spiral pipe diameter must be 4” larger than the width of the grille
Retainer cables are provided on sizes 12" and larger to allow the inner cones to hang securely while adjusting the diffuser
PERFORMANCE DATA
3/16” holes on 1/4” staggered centers
Opposed Blade Volume Damper 3000-0BD-72X24 past 12 months Double deflection transition box mounth3. 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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