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Pottorff > Fire - Smoke Dampers > Fire-Smoke Dampers > 3 Hr Rated > FSD-342

Model FSD-342

3 Hour - Combination Fire Smoke Damper
Triple V Blade

The FSD-342 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-342 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.

FSD-342 Triple V 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 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 metal 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: 6" x 6" (152 x 152)

Maximum Size:
Single Section: 36" x 48" (914 x 1219)
Multiple Section: 108" x 96" (2743 x 2438)
Stainless Steel: 36" x 48" (914 x 1219)


UL 555 Fire Resistance Rating: 3 hour (vertical)

UL 555S Leakage Class:

UL HNLJ.V-5: Ventilation Duct Assemblies

Maximum Temperature: 350oF (177oC)

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