Volume Damper Low-Leak OBD 3000-0BDLL-72X54 Accessories * 3 hour rated *

* 3 hour rated * UL and California State Fire Marshall approved * 4-1/4" standard frame style * Interlocking steel roll-formed blade (3) with roll-formed frames (1) * Blade lock (5) * Damper manufactured from corrosion tested galvanized mild steel (G-90) * Self locking corner (4) * 165° replaceable fusible link (2) h3

To adjust diffuser

Nylon bushings for easy adjustment and quiet setting of blades running parallel to shortest dimension

Available 4" thru 40" round

2550 Series Submittal

Volume Damper Low-Leak OBD 3000-0BDLL-72X54 Accessories * 3 hour rated *h3. 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.