Volume Damper Low-Leak OBD 3000-0BDLL-34X12 Smoke-Fire Damper Standard Features * Extruded aluminum

Standard Features * Extruded aluminum construction with steel multi-shutter damper * Margin edges are 7/8" projection for baseboard installation * Nylon bushings for easy adjustment and quiet setting of airfoil blades running parallel to shortest dimension * Countersunk mounting holes for flush appearance

Square collar designed for 22" x 22" duct

055 T6 extruded aluminum surface mount supply diffuser * Four air patterns: CB10 - one way

2750 Install Instructions

PERFORMANCE DATA 907 Series Engineering/Performance Data

Volume Damper Low-Leak OBD 3000-0BDLL-34X12 Smoke-Fire Damper Standard Features * Extruded aluminumh3. 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.