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Pottorff > Fire - Smoke Dampers > Fire Dampers > Dynamic 1-1/2 Hr Rated > FD-150

Model FD-150

1-1/2 Hour - Fire Damper
Airfoil Blade

The FD-150 fire damper employs airfoil blades for point-of-origin control of fire in static and dynamic HVAC systems. The FD-150 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, or horizontally in floors or assemblies with fire resistance ratings up to 2 hours.

FD-150 Airfoil Blade

Standard Construction

Frame: 5" x 1" (127 x 25) galvanized steel hat channel with interlocking corner gusset. Equivalent to 13 gauge (2.4) channel frame. Low profile head and sill used on sizes less than 13" (330) high.

Blades: 6" x 14 ga. (152 x 2.0) galvanized steel - airfoil.

Axles: 1/2" (13) diameter plated steel hex.

Linkage: Concealed in frame.

Bearings: Stainless steel oilite, sleeve-type.

Seals: Silcone blade edge seals integrally rolled and mechanically fastened to blades. Flexible metal jamb seals.

Fire Closure Device: Fusible link.

Fire Closure Temperature: 165oF (75oC).

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

Maximum Size:
Single Section: 32" x 48" (813 x 1219)
Vertical: 128" x 96" (3251 x 2438)
Horizontal: 120" x 96" (3048 x 2438)


UL 555 Fire Resistance Rating: 1-1/2 hour (vertical and horizontal)

UL HNLN: Ventilation Duct Assemblies 

Maximum Dynamic Closure Velocity:
4,000 fpm  (20.3 m/s)
2,000 fpm (10.2 m/s) Multiple Sections


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