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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:
Casing: Galvanised steel or stainless steel for durability and corrosion resistance
Blades: Aluminium or steel, sometimes with rubber or silicone edge seals
Shaft & Bearings: Stainless steel or zinc-plated steel for smooth operation
Actuation: Manual handwheel, lever, or compatible with electric/pneumatic actuators
Specifications:
Suitable for circular duct systems
Stepless airflow control using radial blade mechanism
Pressure rating: Low to medium pressure duct systems
Available in a wide range of diameters
Can be operated manually or with motorised actuation
Durable construction with minimal leakage
Optional features: position indicators, locking handles, or actuator mounting
Estimated Delivery: 2–5 Working Days
Shipping costs will be calculated during checkout.
Check delivery options at checkout
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:
Casing: Galvanised steel or stainless steel for durability and corrosion resistance
Blades: Aluminium or steel, sometimes with rubber or silicone edge seals
Shaft & Bearings: Stainless steel or zinc-plated steel for smooth operation
Actuation: Manual handwheel, lever, or compatible with electric/pneumatic actuators
Specifications:
Suitable for circular duct systems
Stepless airflow control using radial blade mechanism
Pressure rating: Low to medium pressure duct systems
Available in a wide range of diameters
Can be operated manually or with motorised actuation
Durable construction with minimal leakage
Optional features: position indicators, locking handles, or actuator mounting
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Shipping Information • UK-wide delivery, including Northern Ireland, Scottish Highlands and remote locations. • Orders are processed within 1–2 working days (Mon–Fri). • Standard UK delivery takes approximately 2–5 working days from purchase. • Shipping costs are calculated at checkout based on order size, weight and delivery location. • Free delivery is available on selected orders. Additional charges may apply for large, bulky or remote-area deliveries. • Tracking details are provided once your order has been dispatched. • International shipping is available. Customs duties, taxes and import fees may apply and are the responsibility of the customer. • If your order arrives damaged, incorrect or incomplete, please contact us within 7 days of delivery. For full details, please see our Shipping Policy.
Returns must be requested within 7 days of delivery and approved before being sent back. Items must be unused, undamaged, and in their original packaging. Customers are responsible for return shipping costs, and a restocking fee of up to 25% may apply. Refunds are processed within 3–5 working days after inspection. For damaged, faulty, or incorrect items, please contact us within 7 days of delivery.