Fire Damper - 3 Hour - Dynamic Rated - Curtain Style Blade - Class B - VFD-30D-B

Standard Construction

Frame: 22 ga. (0.85) galvanized steel.

Blades: 24 ga. (0.7) galvanized steel - curtain.

Fire Closure Device: Fusible link.

Fire Closure Temperature: 165^oF (75^oC)

Minimum Size: 6" x 4" (152 x 102)

Maximum Size: 36" x 33" (914 x 838)

Multiple Section: 108" x 21" (2743 x 533)

Stainless Steel: Single Section: 36" x 21" (914 x 533)

Ratings

UL 555 Fire Resistance Rating: 3 hour (vertical)

UL HNLJ.V-5: Ventilation Duct Assemblies

Maximum Dynamic Closure Velocity: 4,000 fpm (20.4 m/s)

Maximum UL 555S Rated Pressure: 4 in.wg. (1.0 kPa)