Parallel Blade Volume Damper 3000P-56X46 Smoke-Fire Damper Front blades are parallel to

Front blades are parallel to the shortest dimension

CB30 - three way

available with one

904 - Double Deflection Adjustable Aluminum Blade Grille For a 24" x 4" Duct Opening  (front blades parallel to shortest dimension)

Free area equals more than 75% of nominal size

Parallel Blade Volume Damper 3000P-56X46 Smoke-Fire Damper Front blades are parallel toh3. 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