4" Round Horizontal/Vertical Fire Damper 2650-40 Specialty Products SD52 Series Performance Data

SD52 Series Performance Data

with 53% free area

Square or rectangular for vertical mount only

945 Series Engineering/Performance Data

Maximum dimension 60w x 52h

4" Round Horizontal/Vertical Fire Damper 2650-40 Specialty Products SD52 Series 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