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Ships within 48 hours · Estimated delivery Aug 30 - Sep 4
Standard Features * Use in applications for installing round without damper * Steel galvaneal construction
904 Series Performance Data
Standard Features * Individually adjustable curved blade T-Bar diffuser * Core is constructed of
Standard Features * 4000 - door core grille with single frame * 4100 - door core grille with additional loose frame *
Heavy gauge steel construction
Opposed Blade Volume Damper 3000-0BD-30X22 Smoke-Fire Damper Standard Features * Use inh3. 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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