Model FD-320

3 Hour - Fire Damper
Triple-V Blade

The FD-320 fire damper employs triple-V blades for point-of-origin control of fire in static and dynamic HVAC systems. The FD-320 is qualified to 4,000 ft/min (20.3 m/s) and 6 in.wg. (1.5 kPa) and may be installed in vertical walls or partitions with fire resistance ratings up to 4 hours.

Standard Construction

Frame: 5" x 1" (127 x 25) galvanized steel at channel with interlocking corner gusset. Equivalent to 13 ga. (2.4) channel frame. Low profile head and sill are used on sizes less than 13" (330) high.
Blades: 6" x 16" ga. (152 x 1.6) galvanized steel - triple-V.
Axles: 1/2" (13) diameter plated steel hex.
Linkage: Concealed in frame.
Bearings: Stainless steel oilite, sleeve-type.
Seals: Flexible metal jamb seals.
Fire Closure Device: Fusible link.
Fire Closure Temperature: 165^oF (75^oC)
Minimum Size: 6" x 6" (152 x 152)
Maximum Size: Single Section: 36" x 48" (914 x 1219)
                           Multiple Section: 72" x 48" (1829 x 1219) or
                                                       36" x 96" (3048 x 1829)
Stainless Steel: Single Section: 36" x 48" (914 x 1219)

Ratings

UL 555 Fire Resistance Rating: 3 hour (vertical)
UL HNLN: Ventilation Duct Assemblies

UL 555 Listing: R14981
CSFM Listing: 3225-1404:105
New York City MEA Listing: 295-98-E
Meets NFPA Standards: 90A, 92A, 92B and 101
Meets Building Code Standards: IBC, NBC, NFPA, SBC and UBC