Parallel Blade Volume Damper 3000P-70X46 Smoke-Fire Damper SD34 - Transition Box Spiral

SD34 - Transition Box Spiral Pipe Grille (DOUBle Deflection)

w/ Tool Operated Opposed Blade Damper

Standard Features * Radius flush style spiral mount diffuser * Single piece formed frame * Curved frame fits flush to spiral pipe * Single deflection * Nylon bushings for easy adjustment * Adjustable blades are parallel to shortest dimension * Available in 8" thru 36" spiral diameters (Note: spiral diameter must be 4" larger than register width) * Soft White Options * RS52-GALV - Single piece galvanized steel with formed frame * RS52-SC - Screwdriver operated air scoop * RS52 O - with recessed screwdriver operated opposed blade damper * Standard Color or Designer Color Finish available on this product

Maximum single section size 24"x24"

1x2 T-Bar (10" x 22" duct)

Parallel Blade Volume Damper 3000P-70X46 Smoke-Fire Damper SD34 - Transition Box Spiralh3. 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