Flexible Ventilation Duct
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Flexible Ventilation Duct

Diameter: 200mm to 3200mm (customizable for specific diameters).
Standard length: 1m to 300m (other lengths can be customized).
Connection method: zipper, Velcro, steel ring or buttonhole.
Optional anti-static fabric.
Adopting the hot air welding production process, the welding width is 5 centimeters.
The high-quality welding process ensures excellent airflow performance and effectively prevents air leakage.

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Product Description
Ventilation Duct Introduction
The ventilation duct is made of PVC composite polyester fiber fabric, processed by hot-air welding. It has the advantages of being lightweight, high-strength, eco-friendly and odorless, with low airflow resistance, low air leakage rate, and long service life. Made of double-sided PVC coating with a smooth surface, providing a low friction coefficient during ventilation. The material complies with European and American occupational safety and health standards, with flame-retardant performance meeting EU and US standards. The high tensile strength in both warp and weft directions ensures the quality of the duct. Anti-static material options are available.
Customizable-Ventilation-Ducts-for-Efficient-Underground-Engineering-Solutions
Specification
Diameter200 mm–3000 mm(customizable upon request)
Length10 m–300 m(customizable upon request)
Connection MethodsZipper/steel ring/ Velcro
Duct ColorsYellow/ black/ orange-red/green
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Production Process
The duct is manufactured using hot-air welding technology with a welding width of 5 cm. The high-quality welding process guarantees excellent airflow performance and prevents air leakage. Iron buckle perforations are provided for convenient suspension, with a standard hole spacing of 80 cm.
Product detail drawing
wechat_2025-10-18_141030_363
Product application
Air ducts are mainly used for ventilation in tunnel, mine and underground engineering construction.
wechat_2025-10-18_141055_668
Installation Method
For ducts with a diameter below 1.8m: single-row suspension.For ducts above 1.8 m: optional production of 60°, 90°, or 180° dual-row suspension, which saves vertical space and facilitates equipment passage. Expansion hooks are directly installed on the tunnel wall, with steel wire ropes pulled horizontally to suspend the duct.Zipper connection can be selected. Zippers are welded separately on the inner and outer duct walls. As air pressure increases, the zipper connection shifts to the outer wall to ensure no air leakage.

Repair Methods
Quick repair tape, fast-drying PVC adhesive, hot-air welding.

Accessories
Reducer duct, elbow duct, T-branch duct.
Contact Header
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