Parallel Blade Volume Damper 3000P-56X12 Smoke-Fire Damper 3 or 4 way patterns

3 or 4 way patterns * Spring push release for easy access to adjust pattern controllers * Round No Labor Collar sizes: 6-10"

57% free area * 1307: 13/16" lattice opening

Double deflection radius mount spiral pipe grille with adjustable blades

Standard Features * Adjustable curved blade

Parallel Blade Volume Damper 3000P-56X12 Smoke-Fire Damper 3 or 4 way patternsh3. 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