Volume Damper Low-Leak OBD 3000-0BDLL-56X28 past 12 months All steel parts with galvanized

All steel parts with galvanized finish or zinc coating

904 - Double Deflection Adjustable Aluminum Blade Grille For a 36" x 14" Duct Opening (front blades parallel to shortest dimension)

Extended sleeve (2751)

904 - Double Deflection Adjustable Aluminum Blade Grille For a 24" x 24" Duct Opening (front blades parallel to shortest dimension)

SD52 Series Performance Data

Volume Damper Low-Leak OBD 3000-0BDLL-56X28 past 12 months All steel parts with galvanizedh3. 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.