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Pottorff > Fire - Smoke Dampers > Fire Dampers > Dynamic 1-1/2 Hr Rated > FD-125R

Model FD-125R

1-1/2 Hour - Fire Damper
Round Blade

The FD-125R fire damper employs a single round blade for point-of-origin control of fire in static and dynamic HVAC systems. This uniqye damper comes standard with mounting plates for interface to round or square openings in masonry, metal stud or wood stud assemblies and is ideal for all round duct applications. The FD-125R 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, or horizontally in floors or assemblies with fire resistance ratings up to 2 hours.

FD-125R Round Blade

Standard Construction

Sleeve/Frame: Integral 16" x 20 ga. (406 x 1.0) galvanized steel with reinforcing beads.

Retaining Plates: Dual sided system suitable for round or square penetrations.

Blade: 14 ga. (2.0) equivalent galvanized steel - round.

Axles: 1/2" (13) diameter plated steel, D<8" (203), 3/4" (19), D≥8" (203).

Linkage: In the air-stream.

Bearings: Bronze oilite, sleeve-type.

Fire Closure Device: Fusible link.

Fire Closure Temperature: 165oF (75oC).

Minimum Size: 6" Ø (152 Ø)

Maximum Size: 24" Ø (610 Ø) 


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

UL 555 Listing: R11767

CSFM Listing: 3225-0368:112 and 3230-0368:113

New York City MEA Listing: 295-98-E

Meets NFPA Standards: 90A, 92A, 92B and 101

Meets Building Code Standards: IBC, NBC, NFPA, SBC and UBC

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