United Enertech FDD-SC Round Dynamic Curtain Fire Damper Horizontal or Vertical Mounting

FEATURES: Type C Curtain Fire Damper with integral Sleeve for round duct. May be installed Horizontally or Vertically. For use in Dynamic or Static HVAC Systems. U.L. 555 Classified 1-1/2 Hour Fire Damper. 100% free area. 165 Degree F U.L. Listed Fusible Link. Material: Galvanized Steel Frame, Sleeve and Blades-SS Spring Loaded. Collars are fabricated 1/4" under listed duct size. Meets or Complies with following as a fire damper: All major building codes including IBC/ICC International Code, UL 555 Listing 1-1/2 Hour -File #R25410, ULC S112 and NFPA 90A. Maximum Ratings are 2,000 FPM Velocity and 4.0 inches w.g.   SUBMITTALS