1-1/2 Hour - Fire Damper
The FD-125R fire damper employs a single round blade for point-of-origin control of fire in static and dynamic HVAC systems. This uniqyw 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.
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: 8" Ø (203 Ø)
Maximum Size: 24" Ø (610 Ø)
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