Opposed Blade Volume Damper 3000-0BD-28X10 past 12 months 904 - Double Deflection Adjustable

904 - Double Deflection Adjustable Aluminum Blade Grille For a 36" x 30" Duct Opening (front blades parallel to shortest dimension)

Blades parallel to shortest dimension

Available 4" thru 40" round

* UL and California State Fire Marshall approved * 2" thinline frame * 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

Performance Data With Opposed Blade Damper

Opposed Blade Volume Damper 3000-0BD-28X10 past 12 months 904 - Double Deflection Adjustableh3. 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.