Opposed Blade Volume Damper 3000-0BD-52X12 past 12 months Center margins are mounted on

Center margins are mounted on the backside of the grille for a streamlined continuous look

Louvers designed with rolled rib for maximum strength and rigidity

Perforated Face Grille

Steel galvaneal construction

Spiral pipe diameter must be 4” larger than Height of the duct opening

Opposed Blade Volume Damper 3000-0BD-52X12 past 12 months Center margins are mounted onh3. 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.