The FSD-121 combination fire smoke damper employs triple-V blades for point-of-origin control of fire and smoke in static and dynamic smoke management systems. The FSD-121 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.
C&S Air Products Combination Fire Smoke Damper, Model: FSD-121, 120 VAC, Fire/Smoke Rating: 1-1/2 hr, 2000 fpm, Triple-V Blade, 13 ga Gauge, Steel, Finish: Galvanized, Horizontal/Vertical Mounting, 4 in-WG, 165 deg F Fire Closure, 350 deg F Maximum, Additional Information: UL Class 1, 6 in 16 ga Galvanized Steel Blade, 1/2 in Dia Axles, Stainless Steel Oilite, Sleeve-Type Bearing