Fire Damper - 1-1/2 Hour - Dynamic Rated - Curtain Style Blade - Class B - VFD-10D-B

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: 165^oF (75^oC)

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)