Parallel Blade Volume Damper 3000P-56X28 Accessories For damper free area chart

For damper free area chart B click here * 2665 - Round fire door for vertical mount only

One piece curved frame with gasket fits flush to spiral pipe

Standard Features * T-Bar lay-in panel with perforated face * 2x2 galvaneal steel panel with seismic support hangers * Round No Labor Collar attached to panel * Soft White Options * 105 P D - multi-shutter damper with hinged perforated face * 105 P O - opposed blade damper with hinged perforated face * TVB - Thermal Vapor Blanket * Square collar

round collar only) * 830 OR - factory installed opposed radial damper (sizes 6"-14") * 830 FR - U

Satin polished finish

Parallel Blade Volume Damper 3000P-56X28 Accessories For damper free area charth3. 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