4" Round Horizontal/Vertical Fire Damper 2650-52 Smoke-Fire Damper 450 Series Engineering/Performance Data

450 Series Engineering/Performance Data

Standard collar diameter is the same as the diffuser size

Options * Sleeve variations * 304 stainless steel construction * Fractional and odd sizes available h3

904 - Double Deflection Adjustable Aluminum Blade Grille For a 48" x 30" Duct Opening (front blades parallel to shortest dimension)

4" Round Horizontal/Vertical Fire Damper 2650-52 Smoke-Fire Damper 450 Series Engineering/Performance Datah3. Standard Features * 2649 Round damper for vertical mount only. Available 4" thru 52" round. * 2650 Round spring actuated (6) damper for vertical or horizontal mount. Available 4" thru 52" round. * UL and California State Fire Marshall approved * 4 1 4" standard frame style * Interlocking steel roll formed blade (3) with roll formed frames (1) * Blade lock (5) * Damper manufactured from corrosion tested galvanized mild steel (G 90) * Self locking