S. I. Industries offers Circular and Fire Dampers. S. I. Industries offers various types of gratings, stair step treads and allied accessories. The Circular and Fire Dampers are designed for automatic isolation of fire compartments in ventilation and air conditioning systems. The Circular and Fire Dampers have to close after a certain temperature is reached, sealing off sections of a building to prevent the spreading of fire and smoke. To prevent smoke from spreading at temperatures below the temperature that triggers the thermal release, fire dampers can also be closed by optional smoke detectors.
