The Fire Damper design especially for applications in fire conditions Applications mostly in commercial and office building.
Dampers design and fabricated with capabilities in fire conditions requirements, the dampers normaly open by Fusible Link and it will automatically closed if there is hot air flow through the dampers and melted the Fuse.
The Frame and Blades using mild steel with thickness 1.2 mm with zinchromate finished. And also available in other material like stainless steel.
For download the pdf, here.