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Single deflection radius mount spiral pipe grille with adjustable blades
SD34 Series Performance Data
CSFM California State Fire Marshal listed
Use for applications with round ductwork to create a clean and easy to install finish for your round registers or diffusers
955 Series Submittal
Volume Damper Low-Leak OBD 3000-0BDLL-68X36 past 12 months 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.
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