On-Line Catalog : Fire Dampers > Dynamic - 1½ hr > 3V Blade > FD-140-OP
Model FD-140-OP 1-½ hour — fire damper
out of partition
The FD-140-OP fire damper employs triple-V blades for point-of-origin control of fire in static and dynamic HVAC systems. These specialty dampers are approved for installation with the closed plane of the blades up to 14-1/2" (368) outside the fire rated partition and allow for direct service access from the face of the damper through the HVAC grille. The FD-140-OP is qualified to 2,000 ft/min (10.2 m/s) and 4 in.wg. (1.0 kPa) and may be installed in vertical walls or partitions, or horizontally in floors or assemblies with fire resistance ratings up to 2 hours.