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Spiral Duct and Fittings
The Spiral Duct are widely used in HVAC air distribution systems, known for their excellent strength, aesthetic appearance, and airflow efficiency.
Formed from continuous strips of galvanized steel into a spiral seam, these ducts provide superior rigidity, low leakage, and a clean, professional finish ideal for both exposed and concealed installations.
Spiral ducts are suitable for commercial, industrial, and public facilities where efficient air movement, space optimization, and long service life are required. Fittings such as elbows, reducers, and joints ensure smooth airflow transitions throughout the duct network.
Key Specifications
Material: Galvanized Steel / Stainless Steel / Aluminum
Diameter: 100 – 1600 mm (customizable)
Thickness: 0.5–1.2 mm
Standard: SMACNA / DW144 / ISO 9001
Connection: Slip Joint / Coupling / Flange System
Key Features
Smooth Airflow & Low Leakage
The spiral seam design ensures uniform airflow and minimizes pressure loss, delivering better energy performance than rectangular ducts.
High Structural Strength
The continuous spiral seam construction provides excellent rigidity, allowing longer unsupported duct runs with fewer hangers.
Quick Installation
Pre-fabricated lengths and easy-to-use fittings reduce on-site labor time and simplify system assembly.
Versatile Design Options
Available in multiple diameters and materials, with compatible fittings such as elbows, reducers, and take-offs for complete air duct systems.
Technical Specifications
| Material | Galvanized Steel (G90 / DX51D+Z), Stainless Steel, or Aluminum |
|---|---|
| Diameter Range | 100 – 1600 mm |
| Thickness | 0.5 – 1.2 mm |
| Length | Standard 3 m or 4 m sections |
| Connection Type | Slip Joint, Coupling, or Flange System |
| Standards | SMACNA / DW144 / ISO 9001 |
| Surface Finish | Zinc Coated / Powder Coated / Painted |
| Application | Air Supply, Return Air, Exhaust, and Fresh Air Systems |
Applications
Spiral ducts and fittings are used in a wide range of HVAC systems that demand efficient airflow and space-saving installation. Typical applications include:
Material & Manufacturing Process
Spiral ducts are produced using advanced automatic forming machines that roll galvanized steel into a continuous spiral seam, ensuring consistent diameter and perfect roundness.
