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

Model FD-150-OP

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

The FD-150-OP fire damper employs airfoil 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 service access from the face of the damper through the HVAC grille. The FD-150-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.

FD-150-OP Out of Partition

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.

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: Silicone 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:
32" x 36" (613 x 914) Max Single
36" x 36" (914 x 914) Max Multiple


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

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

Maximum UL555S Rated Pressure:
6 in. wg. (1.5 kPa)
4in. wg. (1.0 kPa) below 8" in height


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