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51AVS/51AHS 1-1/2 Hour Type A

51AVS/51AHS 1-1/2 HOUR LABEL STATIC FIRE DAMPERS are UL/ULC approved for use in HVAC systems where the fans automatically shut down in the event of a fire alarm and are suitable for use in fire separations with a fire resistance rating of 2 hours or less.


Fusible Link:
4 ¼ inches (108 mm)
Roll formed 20 GA. galvanized steel with hemmed edge
Roll formed 22 GA. galvanized steel.
Interlocking curtain type blade.
165°F (73.9°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” Retaining Angles

• PRR - Pull Ring Release