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Countersunk mounting holes with color matching Phillips Pozidriv screws
Steel construction
Smoke Test and More Information on MA Series Diffusers
HVL Series Submittal
Locking screw to hold damper in place
4" Round Vertical Mount Fire Damper 2649-22 Smoke-Fire Damper Countersunk mounting holes with colorh3. 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
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