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Pottorff > Fire - Smoke Dampers > Fire-Smoke Dampers > 3 Hr Rated > FSD-352

Model FSD-352

3 Hour - Combination Fire Smoke Damper
Airfoil Blade

The FSD-352 combination fire smoke damper employs airfoil blades for point-of-origin control of fire and smoke in static and dynamic smoke management systems. The FSD-352 is qualified to 4,000 ft/min (20.3 m/s) and 8 in.wg. (2.0 kPa) and may be installed in vertical walls or partitions, or horizontally in floors or assemblies with fire resistance ratings up to 4 hours.

FSD-352 Airfoil Blade

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 14 ga. (152 x 2.06) galvanized steel - airfoil.

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 integrally rolled and mechanically fastened to blades. Flexible metal steel jamb seals.

Actuator: 120 VAC, power-open, spring-close, external mount.

Fire Closure Device:
HS-10 (electric actuators)
PFV (pneumatic actuators)    

Fire Closure Temperature: 165oF (75oC)

Minimum Size: 8" x 6" (203 x 152)

Maximum Size:
Single Section: Vertical: 30" x 48" (203 x 1219)
Horizontal: 32" x 48" (813 x 1219)
Multiple Section: Vertical: 120" x 96" (3048 x 2438)
Horizontal: 64" x 96" (1626 x 2438)


UL 555 Fire Resistance Rating: 3 hour (vertical and horizontal)

UL 555S Leakage Class:

UL HNLJ.V-5: Ventilation Duct Assemblies

Maximum Temperature: 350oF (177oC)

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