Volume Damper Low-Leak OBD 3000-0BDLL-40X30 Smoke-Fire Damper Standard Features * 1 1/2

Standard Features * 1 1/2 hour rated fire damper * 2549 - Round damper for vertical mount only

945 Series Engineering/Performance Data

Lever operated multi-shutter damper

700 CB20 - two way

½ × ½ × ½ Aluminum lattice

Volume Damper Low-Leak OBD 3000-0BDLL-40X30 Smoke-Fire Damper Standard Features * 1 1/2h3. 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.