IRIS dampers are a brilliantly simple solution for fast and exact measurement, balance and control of airflow. They are ideal for supply and exhaust tracking control, individual comfort control, and any space requiring accurate airflow regulation. Applications for IRIS dampers include office buildings, pharmaceuticals, clean room environments, and laboratories. Its unique design allows for airflow to be measured and controlled at a single station, thus saving time and money in initial installation and commissioning, and those applications requiring air balance on a regular basis.
IRIS dampers are comprised of a casing, damper blades, an adjustment or regulating nut, and airflow adjustment chart, and airflow taps. Blades and casing are manufactured from galvanized steel. The remaining components are made from high strength plastics.
Features & Benefits of IRIS Dampers
Precise airflow measurement
Accurate air balancing to +/- 5% in a straight duct
Single station measurement and control
Reduced field labor time
Interlocking galvanized steel plate construction
Fitted neoprene gasket for airtight mounting
Compact design, superior performance
Fully retractable blades for duct cleaning
Max operating temperature: 180 F continuous, 250 F intermittent
Available in ten sizes: 4″ through 32″ diameter
Capacities: 15 cfm to 20,000 cfm
The calibration accuracy of an IRIS damper during disturbance free airflow is 5%. However, when an IRIS damper is installed near duct fittings, measurement accuracy may be affected. For optimum operation and airflow control, the chart (Fig. 1) indicates the recommended distances between an IRIS damper and duct elbows, tees and transitions. From the chart, to achieve the airflow accuracy, m2, distance Lmin defines the minimum distance separating an IRIS damper from the fitting.