The Zest Iris Damper is an ideal air flow regulator and measuring device for circular ducts. Accurate control, smooth and quiet air flow and reliable measuring results are achieved by the special iris construction.

In the fully open position the Zest iris damper provides 100% free area with no control mechanism in the airstream allowing easy and effective cleaning of the ductwork system.

• No control mechanism in airstream.
• Differential pressure measuring facility.
• Comprehensive size range.
• 100% open position allows for easy cleaning.
• Accurate volume control.
• Motorised units available.