Model VFD-10D-B
1-1/2 Hour - Dynamic Rated - Fire Damper
Curtain Style Blade
The VFD-10D-B fire damper employs out of the airstream curtain style blades for point-of-origin control of fire in static and dynamic HVAC systems. The VFD-10D-B is qualified to 4,000 ft/min (20.3 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.
Standard Construction
Frame: 22 ga. (0.85) galvanized steel.
Blades: 24 ga. (0.7) galvanized steel - curtain style.
Fire Closure Device: Fusible link.
Fire Closure Temperature: 165oF (75oC)
Minimum Size: 6" x 4" (152 x 102)
Maximum Size:
Single Section: Vertical: 36" x 44" (914 x 1118)
Horizontal: 36" x 33" (914 x 838)
Multiple Section: Vertical: 120" x 69" (3048 x 1753) or 72" x 117" (1829 x 2972)
Horizontal: 36" x 34" (914 x 864) or 72" x 16" (1829 x 4067)
Stainless Steel: Single Section: Vertical: 36" x 33" (914 x 838)
Ratings
UL 555 Fire Resistance Rating: 1-1/2 hour (vertical and horizontal)
UL HNLJ.V-5: Ventilation Duct Assemblies
Maximum Dynamic Closure Velocity:
4000 fpm (20.3 m/s)
2000 fpm (10. 2 m/s)
Maximum UL555S Rated Pressure: 4 in. wg. (1.0kPa)
The Preferred Solution
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