On-Line Catalog : Fire Dampers > Dynamic - 3 hr > 3V Blade > FD-340
Model FD-340 3 hour — fire damper
The FD-340 fire damper employs triple-V blades for point-of-origin control of fire in static and dynamic HVAC systems. The FD-340 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 with fire resistance ratings up to 4 hours.