Opposed Blade Volume Damper 3000-0BD-70X52 Commercial Adjustable aluminum airfoil blades oriented

Adjustable aluminum airfoil blades oriented for 1 or 2 way airflow pattern

904 - Double Deflection Adjustable Aluminum Blade Grille For a 20" x 20" Duct Opening (front blades parallel to shortest dimension)

Fractional Sizes

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

Designed for return applications and as a vented access door to equipment

Opposed Blade Volume Damper 3000-0BD-70X52 Commercial Adjustable aluminum airfoil blades orientedh3. 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.