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Pottorff > Fire - Smoke Dampers > Fire Dampers > Dynamic 1-1/2 Hr Rated > FD-140-OP

Model FD-140-OP

1-1/2 Hour - Fire Damper
Out of Partition

The FD-140-OP fire damper employs triple-V blades for point-of-origin control of fire in static and dynamic HVAC systems. These specialty dampers are approved for installation with the closed plane of the blades up to 14-1/2" (368) outside the fire-rated partition and allow for direct serice access from the face of the damper through the HVAC grille. The FD-140-OP 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.

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 16 ga. (152 x 1.6) galvanized steel - triple-V.

Sleeve: 14" x 20 ga. (406 x 1.0) galvanized steel with 1" (25) flange and factory installed thermal insulation on four sides.

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: 165oF (75oC).

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

Maximum Size: 36" x 48" (914 x 1219)


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

Maximum Dynamic Closure Velocity: 4,000 fpm (20.3 m/s)

Maximum UL555S Rated Pressure: 6 in. wg. (1.5 kPa)


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