Made from High quality galvanized steel gauge 16. Stainless steel frame is
Made from High quality galvanized steel gauge 22. Stainless steel blades are available as option
from galvanized steel with a spring holder.
made from stainless steel spring
UL listed fusible links which has fire rating of 165° F I 212° F
Made from galvanized steel gauge (1 6 – 1 0). Sleeve thickness must be thicker than duct connected to it. Sleeve gauge with the SMACNA Duct Connection Fire, Smoke and Radiation Damper Installation HVAC Systems and with NFPA-90 A, Damper must be secured inside sleeve by sub-frame and the sub-frame to be fastened by steel rivets or bolt.
Duct Sleeve Connection
Fasteners may be used as following