Series 77 Type C | 1½ Hour Rated

Dynamic Fire Damper

Standard Profile Fire Damper – 4¼” 22Ga 1 Piece Rollformed Frame
Dynamic for Installation in Systems Where Fans Remain Running During Fire and Smoke Control
UL Classified UL 555 – 1½ Hour Rating, Dynamic for Use in Installations Rated Less Than 3 Hours

Specifications:

Blades

Blades and Frame Out of Air-Stream 100% Free Area

Material

Galvanized Steel – Standard
Stainless Steel – Optional

Fusible Link

165° Rated Link – Standard
212° Rated Link – Optional

Orientation

Available for Vertical or Horizontal Installations with Round, Oval, or Rectangular Collars

22Ga Optional Sleeves

12” Sleeve – Standard
8”, 17”, 20”, or 24” Lengths – Optional

Vertical Sizes

4” to 31”
Oval and Rectangular 6” x 6” to 34” x 31”

Horizontal Sizes

4” to 20”
Oval and Rectangular 6” x 6” to 22” x 20”