4" Round Vertical Mount Fire Damper 2649-22 Smoke-Fire Damper CSFM California State Fire Marshal

CSFM California State Fire Marshal listed

Locking screw to hold damper in place

blades prevent metal on metal rattle Countersunk mounting holes with color matching Phillips Pozidriv screws Rust-resistant pre-coat with durable powder finish Soft White Options Screwdriver operated Opposed Blade Damper 2" ADC compliant square to round collar with a bead for ease of installation Heavy Duty Construction MRI Compatible Insect Screen Fractional

Smoke Test and More Information on MA Series Diffusers

Steel construction

4" Round Vertical Mount Fire Damper 2649-22 Smoke-Fire Damper CSFM California State Fire Marshalh3. 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