Spiral round ducts are manufactured from galvanized steel, aluminum, or stainless steel strips, with diameters ranging from 100 to 2500 mm and lengths from 0.5 to 6 meters.
The standard length of each duct section is 3 meters. The thickness range of the duct varies depending on the material used.

Structure of Spiral Ducts

• The spiral seam provides high mechanical strength while ensuring airtightness and minimizing leakage.

• The smooth inner surface of the duct reduces frictional losses to a minimum.

• By adding additional corrugations along the duct circumference, the strength can be significantly increased, enabling the production of lighter and more economical ducts compared to longitudinal seam ducts or rectangular ducts of equivalent size.

• Corrugated spiral ducts are produced using this method.

Advantages of Spiral Round Ducts

• Higher strength compared to longitudinal seam round ducts

• Very low air leakage

• Less noise generation compared to rectangular ducts

• More uniform airflow and proper air distribution

• Lower pressure drop compared to rectangular ducts

• Reduced energy loss due to smaller surface area

• Quick and easy installation

• Fewer flanges and supports required

• Easier insulation

• Available in galvanized steel, aluminum, or stainless steel depending on application

• Attractive appearance

• Reduced delivery time thanks to pre-fabrication and stocking of standard ducts and fittings

Technical Specifications of Galvanized Spiral Ducts

• Operating temperature: -20°C to +250°C

Spiral Duct Fittings

Fittings are used for air distribution, duct size transitions, and changes in duct direction within the duct network.

• All fittings are manufactured with precise tolerances to ensure proper and easy assembly.

• Types of fittings:

  • Slip joint (inside duct)

  • Gasketed joint

  • Flanged joint

• Fittings can be manufactured from galvanized steel, aluminum, or stainless steel, depending on customer requirements.