Model FSD-321

3 Hour - Combination Fire Smoke Damper
Triple V Blade

The FSD-321 combination fire smoke damper employs triple-V blades for point-of-origin control of fire and smoke in static and dynamic smoke management systems. The FSD-321 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 2 hours.

Standard Construction

Frame: 5" x 1" (127 x 25) galvanized steel hat channel with inerlocking 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.
Sleeve: 16" x 20 ga. (406 x 1.0) galvanized steel.
Axles: 1/2" (13) diameter plated steel hex.
Linkage: Concealed in frame.
Bearings: Stainless steel oilite, sleeve-type.
Seals: Silicone blade edge seals and flexible metall jamb seals.
Actuator: 120 VAC, power-open, spring-close, external mount.
Fire Closure Device: HS-10 (electric actuators)
                                    PFV (pneumatic actuators)    
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: 108" x 96" (2743 x 2438)

Ratings

UL 555 Fire Resistance Rating: 3 hour (vertical)
UL 555S Leakage Class: 1 
UL HNLJ.V-5: Ventilation Duct Assemblies
Maximum Temperature: 350^oF (177^oC)

UL 555 and 555S Listing: R14981
CSFM Listing: 3225-1404:105 and 3230-1404:106
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