Round Volumn Damper

Standard construction : Frame: 8"x11/4"x16ga. galvanized steel channel with comer braces. Flange: Corner 0.4" dia. x 8 EA for installation bolt holes. Blades: 6" width 16ga. galvanized steel. Approx 6" on center. Linkage: Concealed in frame or face linkage inside of air stream. Bearings: sleeve bearing Axles: 1/2" dia. galvanized steel. MIN. Damper size: PB single blade-5" W x 4" H, OB-8" W x 14" H MAX. Section size: 48" x 72" MAX. damper size: unlimited. Hand quadrant: for manual operation Steel construction: welded constructions Axles: bolted to blade and tag welded. Finish: Galvanized steel zinc plated hardware. Installation instruction Air flow rate control between Duct and Duct bolt conection Variations(at extra charge) 1. Special finish 2. Special material: alum., stainless steel, etc. 3. Special blade seals and axle shaft seals 4. Special thickness of blade or frame.

70 kg/m3 density, 20 mm thickness fire rated rockwool is used between the blade walls. Fire dampers are used for the purpose of preventing the fire and smoke from diffusing to other places with air ducts in building ventilation systems. The fusible link mechanism that is presented at the damper provides the blade in the damper to close by driving with the return spring when it reaches at 72°C and prevents the fire from diffusing to other places. Also, it can be controlled with servomotor automation system, as well. The fusible link is fixed to the damper on the face where damper handle is presented in such a way that it can be replaced easily.