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53CRVD 3 Hour Type CR (Round)

53CRVD 3 HOUR LABEL DYNAMIC FIRE DAMPER is suitable for use in vertical fire separations with a fire resistance rating of 4 hours or less, and is 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