Volume Damper Low-Leak OBD 3000-0BDLL-66X44 Smoke-Fire Damper Locking screw to hold damper

Locking screw to hold damper in place

Blades are parallel to the shortest dimension

UL listed and tested in accordance with UL Standard 555C

available 4" through 40" round (2549)

055 T6 extruded aluminum frame * Hand operated lever for easy access * Concealed mounting holes * Filter door hinges parallel to longest side * Filter retainers * Removable face for easy cleaning * For 1" filter (not included) * Soft White Options * 600 2 FG - 2" filter spacing (filter not included) * 600 TFG - T-Bar mount * Standard Color

Volume Damper Low-Leak OBD 3000-0BDLL-66X44 Smoke-Fire Damper Locking screw to hold damperh3. 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.