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Single deflection radius mount spiral pipe grille with adjustable blades
RD Series Submittal
Flush core and frame provides smooth surface
Available 4" thru 40" round
Opposed Blade Volume Damper 3000-0BD-38X34 Residential Registers & Grilles Single deflection radius mount spiralh3. 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.
