logo ruskin 60px


Smoke Damper, Steel, UL555S Classified, Class I, Aluminum Airfoil Blade, w/Optional Sleeve


  • UL555S Class I.
  • Maximum velocity of 4,000 fpm.
  • Maximum 8" static pressure.
  • With factory furnished actuator, provides fail-safe operation (the damper automatically goes to the desired fail-safe position when fire interrupts power).
  • Available with factory furnished sleeves.
  • Airfoil blades, which have greater strength, less static pressure, superior sealing, superior fire protection, and produce less noise.


logo ruskin 60px

Additional Info

  • Blade Type: Airfoil
  • Rating: 1-1/2 Hours
  • AMCA Certified: Yes
  • Modulating: No
  • Grille Access: No
  • Explosion Proof: No
  • Leakage Class: Class I

Related items

  • MDRS25 MDRS25

    The MDRS25 is a ruggedly built round manual balancing damper with factory mounted, locking hand quadrant designed especially for manual balancing applications within round spiral ductwork.

  • MD35 MD35
    The MD35 Manual Balancing Damper has a 5" frame.
  • MD25 MD25
    The MD25 Manual Balancing Damper has a 3" frame.
  • MD15 MD15
    The MD15 is a ruggedly built, inexpensive damper with stand-off bracket for the hand quadrant both factory furnished. It is designed for manual balancing applications with rectangular ductwork. 
    The ELM90 Adjustable Louver is 6" deep and has a 37 1/2 degree blade angle.
More in this category: « SD37 SD60 »

Air Delivery

  • RNS2
    RNS2 The Nailor Models RNSA and ARNSA Adjustable Square Ceiling Air Diffusers have been specially designed to provide boththe unobtrusive appearance…
    in Stamped Square Ceiling Diffusers

Life Safety

Air Measuring

More Control

Proudly Representing

logo ruskin 60px logo nailor 60pxh ACME Logo Air Concepts FlexmasterLogo

InetSupervisor thermal header Engineered Comfort Mamac Logo