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Standard Features * 2533 - Square or rectangular for vertical mount only
Double deflection radius mount spiral pipe grille with adjustable blades
back blades parallel to longest dimension
Recessed screwdriver operated opposed blade damper to control air volume for positive balance of system
Note: Sizes listed are the duct or opening size the grille will fit into
Volume Damper Low-Leak OBD 3000-0BDLL-46X30 T-Bar Standard Features * 2533 -h3. 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.
