Backdraft Vertical Mount 3550-24X26 Smoke-Fire Damper Nylon bushings on adjustable blades

Nylon bushings on adjustable blades to prevent metal on metal rattle

14" and 16" * Soft White Options * 825 MA - modular core fixed blade diffuser with field adjustable air patterns * Field installable Bowtie Damper (BD) (sizes 6-14") * 825 OR - factory installed opposed radial damper (sizes 6"-14") * 825 FR - U

SUBMITTAL 2720 Series Submittal

3/16” holes on 1/4” staggered centers

904 - Double Deflection Adjustable Aluminum Blade Grille For a 48" x 20" Duct Opening (front blades parallel to shortest dimension)

Backdraft Vertical Mount 3550-24X26 Smoke-Fire Damper Nylon bushings on adjustable bladesh3. Standard Features * 3550 Vertical mount * 3560 Horizontal mount air up * 3570 Horizontal mount air down * 3580 Round sizes available 5" to 24" * All non motorized backdraft dampers * Dampers are opened by air pressure differential and closed by gravity * 16 gauge channel frame with 26 gauge galvanized blades * Out of airstream linkage * Blades are vee stiffened 26 gauge for strength and stability * Square steel pivot pins * Nylon bushings * Single