Iris Damper
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An Iris Damper is a type of adjustable airflow control device used in HVAC duct systems to regulate the volume of air passing through circular ducts. Its unique design allows precise throttling of airflow by rotating multiple radial blades, similar to a camera iris, making it ideal for balancing air in commercial, industrial, and laboratory ventilation systems. Iris dampers are compact, easy to install, and provide smooth, stepless control of airflow.
Material:
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Casing: Galvanised steel or stainless steel for durability and corrosion resistance
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Blades: Aluminium or steel, sometimes with rubber or silicone edge seals
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Shaft & Bearings: Stainless steel or zinc-plated steel for smooth operation
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Actuation: Manual handwheel, lever, or compatible with electric/pneumatic actuators
Specifications:
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Suitable for circular duct systems
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Stepless airflow control using radial blade mechanism
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Pressure rating: Low to medium pressure duct systems
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Available in a wide range of diameters
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Can be operated manually or with motorised actuation
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Durable construction with minimal leakage
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Optional features: position indicators, locking handles, or actuator mounting