Butterfly Type Ceiling Radiation Dampers – Rectangular / Round

Salient Features

  • Sizes: 6″ to 144″
  • Process Temperature: up to 2200° F
  • Configurations: round, square, & rectangular
  • Construction: S.S. or painted C.S.
  • Shutoff: up to 99%
  • Seal Options: tad pole, metal seat, swing-thru; control & balancing
  • Actuation: manual, electric, pneumatic (spring return and failsafe available)
  • Modulation: open/closed or modulating
  • Pressure: up to 1-PSI & 4000 FPM process air
  • Ball bearings and shaft packing glands standard up to 400°F

Ceiling radiation dampers are specialized fire safety devices used in building HVAC (Heating, Ventilation, and Air Conditioning) systems to protect against the spread of fire and radiant heat through ductwork, particularly in concealed spaces above ceilings.

Butterfly type ceiling dampers are mechanical devices used to control or regulate the flow of air, gases, or fluids within a duct or pipe. They consist of a flat or curved disc, often resembling the shape of a butterfly’s wings, which can be rotated about a central axis to open or close, thus adjusting the passage of the substance. Butterfly dampers are available in different sizes and shapes – square / rectangular and circular.


  • HVAC Systems
  • Industrial Ventilation
  • Power Plants
  • Dust Collection Systems
  • Laboratory Fume Hoods
  • Commercial Kitchens
  • Petrochemical and Chemical Plants
  • Wastewater Treatment Plants
  • Marine and Aerospace
  • Tunnel Ventilation

Standards and Certifications

  • AMCA Certifications
  • ASHRAE Standards
  • NFPA Standards
  • UL Listed
  • CE Marked