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Tool operated Opposed Blade Damper
904 - Double Deflection Adjustable Aluminum Blade Grille For a 24" x 16" duct Opening (front blades parallel to shortest dimension)
Long throw individually adjustable blades with 1 1/2" blades on 1 1/2" centers or 3" blades on 3" centers
Available in even sizes 6" to 20" and 24"
SD34 Series Performance Data
Parallel Blade Volume Damper 3000P-56X52 Residential Registers & Grilles Tool operated Opposed Blade Damperh3. Standard Features * 16 gauge galvanized channel frame * Parallel blades are cee 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. Options * 3000 PLL Low Leak Air Control
