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Double-Layer Aluminum Foil Flexible Duct with Galvanized Helix Reinforcement – High-Temperature & Negative Pressure Resistant

Ideal for Semiconductor Chip Processing, UV Printing, Laser Exhaust, and Fume Extraction Applications

This specialized double-layer aluminum foil flexible duct features a galvanized steel wire helix skeleton for enhanced durability, high-temperature resistance, and excellent negative pressure (vacuum) performance. It is engineered for demanding industrial environments requiring clean, reliable exhaust of fumes, vapors, heat, and particulates—particularly in high-tech sectors like semiconductor/chip manufacturing, UV printing/curing systems, laser cutting/engraving, and precision fume extraction.

Structure and Key Features

Primary Material: Double-layer composite aluminum foil, with silver-white, dust-free, medium-to-high temperature resistant foil (typically 0.1 mm thick or reinforced variants) as the core duct body.

Reinforcement Skeleton: Galvanized steel wire helix, spiral-wound and tightly interlocked for superior structural integrity. The helix provides:

Excellent flexibility and bendability.

Strong resistance to collapse under negative pressure (vacuum/suction conditions).

Enhanced tensile strength and anti-deformation performance.

Double-Layer Design: Inner and outer layers of aluminum foil sandwich the helix, offering improved airtightness, thermal insulation, corrosion resistance, and flame-retardant properties compared to single-layer ducts.

Surface Finish: Smooth aluminum silver color, low-dust emission, suitable for cleanroom-adjacent or sensitive electronic environments.

Specifications and Performance

Inner Diameter Range: Commonly 2"–12" (50–300 mm); customizable.

Temperature Range: -30°C to +200°C (or higher variants up to +400°F/+204°C depending on foil grade); handles medium-to-high temperature exhaust without degradation.

Negative Pressure Resistance: High vacuum tolerance–maintains shape and airflow under strong suction from exhaust fans or fume extractors.

Tensile Strength: Typically 12 kgf/25 mm or better for the reinforced foil structure.

Bending Radius: Minimum 1.25 × D (duct diameter) for smooth, kink-free installation.

Helix Spacing: 19–24 mm (adjustable) for balanced flexibility and rigidity.

Standard Length: 5 meters per piece; extendable to 10 meters or custom.

Working Pressure: Positive up to 3000 Pa (or higher); excels in negative pressure fume extraction.

Other Properties: Lightweight, easy to install/cut, flame-retardant, corrosion-resistant, low air resistance, minimal particle shedding.

General Advantages

High Flexibility & Extensibility: Easily bends around equipment, machines, or tight spaces without tools.

High-Temperature & Fume Resistance: Withstands hot exhaust gases, chemical vapors, and laser/UV-generated fumes without melting, cracking, or off-gassing.

Negative Pressure Durability: Galvanized helix prevents collapse during strong suction—critical for laser fume extractors, UV curing hoods, and semiconductor process ventilation.

Clean & Dust-Free: Double-layer foil minimizes internal shedding, ideal for chip/semiconductor fabs, clean benches, or precision printing areas.

Versatile Applications:

Semiconductor chip manufacturing exhaust (wafer processing, etching, CVD/PVD fume removal).

UV printing/curing systems (ink/fume extraction from UV lamps and curing zones).

Laser cutting/engraving/marking exhaust (smoke, particulates, and odors from plastics, metals, PCBs).

General industrial fume hoods, pollution control, and ventilation in electronics/high-tech facilities.

Customization Options

All specifications (diameter, length, foil thickness, helix material/galvanization grade, temperature rating, connectors/end fittings) can be tailored to your exact requirements. We support OEM/ODM for branding, packaging, and compliance with international standards for semiconductor use.

This duct is a reliable, cost-effective solution for high-performance fume extraction in precision industries—ensuring safe, efficient removal of hazardous emissions while maintaining system integrity under heat and vacuum stress.

For further information, please refer to the link below：

https://www.ductinghose.com/blog/double-layer-aluminum-foil-flexible-duct-galvanized-helix-guide

If you need product images, detailed datasheets, samples, wholesale pricing, or further customization (e.g., higher temp variants or stainless steel helix upgrade), let me know!