Volume Damper Low-Leak OBD 3000-0BDLL-72X72 T-Bar 3/16” holes on 1/4” staggered

3/16” holes on 1/4” staggered centers

* 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

Modern step-down design with 4-way air diffusion

SD34 - Transition Box Spiral Pipe Grille (DOUBle Deflection)

Narrow ceiling grid dimples for 9/16" T-Rails

Volume Damper Low-Leak OBD 3000-0BDLL-72X72 T-Bar 3/16” holes on 1/4” staggeredh3. 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.