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51CVD/51CHD 1-1/2 Hour Type C (Sq./Rect.)

51CVD/51CHD 1-1/2 LABEL DYNAMIC FIRE DAMPERS are suitable for use in fire separations with a fire resistance rating of 2 hours or less, and are UL/ULC approved for use in HVAC systems where the fans remain on in the event of a fire.

DEPTH:  4 ¼“ (108). 

FRAME:  Roll formed 20 Ga. galvanized steel with hemmed edge. 

BLADES: Roll formed 22 Ga. galvanized steel.

             Interlocking curtain type blades. 

FUSIBLE LINK:  165°F (74 C).  


  • Factory supplied Sleeve – 22, 20, 18 or 16 GA (Sleeve length required)
  • Access Door factory mounted in a common sleeve
  • Fusible Link 212°F (100°C)
  •  1 ½” x 1 ½” "Quick-Fit" Retaining Angles
  • HP - External Sealing for medium/high pressure (up to 6" w.g. [1.5 kPa])