Opposed Blade Volume Damper 3000-0BD-68X60 Accessories 1/2" spacing dual angular louvers

1/2" spacing dual angular louvers

3 hour fire resistance rating

904 - Double Deflection Adjustable Aluminum Blade Grille For a 20" x 14" Duct Opening (front blades parallel to shortest dimension)

945 Series Submittal

cross bars

Opposed Blade Volume Damper 3000-0BD-68X60 Accessories 1/2" spacing dual angular louversh3. 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.