NUOENWEI PVC Flexible Exhaust Duct | Negative Pressure Ventilation Hose
The NUOENWEI PVC flexible exhaust duct combines flexibility, durability, and chemical resistance to serve as the core component of your negative pressure ventilation system. Unlike ordinary air hoses, this duct is purpose-built to withstand continuous negative pressure (vacuum) without collapsing or kinking.
How it works
A helical steel wire provides structural support, while the outer PVC layer offers excellent resistance to oils, acids, alkalis, and weather exposure. The steel wire is fully covered by a black rubber strip, which not only protects the wire from corrosion but also adds an extra layer of wear resistance when the duct drags on rough floors or edges.
Why “flexible exhaust duct” matters
Rigid metal ducts are heavy and difficult to install in tight spaces. The NUOENWEI PVC flexible exhaust duct bends easily (minimum bend radius available upon request), allowing you to route exhaust lines around obstacles, machinery, or building structures — all while maintaining strong negative pressure airflow.
Customization options
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Wire pitch: standard 6 cm, can be adjusted for higher or lower flexibility needs
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Diameter: from 100 mm to 1500 mm (e.g., 4″, 6″, 8″, 10″, 12″, 16″, 20″, 24″, 36″, 48″, 60″)
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Length: 5 m or 10 m standard; other lengths available on request
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Color: standard gray or black (custom color upon volume order)
All NUOENWEI ducts are manufactured under strict quality control, ensuring consistent wall thickness, smooth internal surface for low friction loss, and flame-retardant properties that meet industrial safety standards.
NUOENWEI PVC flexible exhaust duct
The NUOENWEI PVC flexible exhaust duct is a professional-grade ventilation hose specifically designed for negative pressure exhaust systems. Made from high-quality PVC material and reinforced with a steel wire spiral (encapsulated by black rubber strips for extra abrasion resistance), this duct delivers reliable performance in demanding industrial environments.
Whether you need to extract fumes, dust, hot air, or corrosive gases, the NUOENWEI duct maintains structural integrity under vacuum conditions. With a standard wire pitch of 6 cm (customizable), diameters from 100 mm to 1500 mm, and lengths of 5 or 10 meters, it adapts to a wide range of exhaust applications.
Related Parameters
| Parameter | Details |
|---|---|
| Brand | NUOENWEI |
| Material | PVC (polyvinyl chloride) with steel wire helix |
| Wire coating | Black rubber strip for abrasion & corrosion protection |
| Standard wire pitch | 6 cm (center to center of spiral) – customizable |
| Inner diameter range | 100 mm – 1500 mm (other sizes on request) |
| Standard lengths | 5 m, 10 m |
| Wall thickness | Depends on diameter – typically 0.4–1.2 mm (contact for exact spec) |
| Temperature range | -20°C to +80°C (-4°F to +176°F) |
| Flame retardant | Yes (self-extinguishing, UL94 V-0 equivalent) |
| Negative pressure resistance | Suitable for continuous vacuum / negative pressure systems |
| Corrosion resistance | Good against many acids, alkalis, salt spray, and oils |
| Customization | Diameter, length, wire pitch, color (MOQ may apply) |
Product Advantages
1. High-grade PVC material
Benefit: Resistant to corrosion, oils, and many chemicals. Ideal for exhaust of acidic or alkaline fumes.
2. Steel wire spiral reinforcement
Benefit: Prevents collapse under negative pressure (vacuum up to -0.6 bar, typical value). Maintains airflow even in demanding exhaust systems.
3. Black rubber strip over steel wire
Benefit: Protects the wire from rust and mechanical damage; adds abrasion resistance when the duct drags on rough floors or metal edges.
4. 6 cm wire pitch (customizable)
Benefit: Standard pitch balances flexibility and rigidity. Tighter pitch available for stronger vacuum resistance; wider pitch for lighter-duty bends.
5. Wide diameter range (100 mm – 1500 mm)
Benefit: Compatible with nearly any exhaust fan, dust collector, or fume extraction system. No need for reducers or adapters.
6. Flame retardant (UL94 V-0 equivalent)
Benefit: Enhances safety in fire-risk environments such as welding shops, chemical plants, and woodworking facilities.
7. Smooth inner wall
Benefit: Reduces air resistance and particle buildup, improving energy efficiency and extending cleaning intervals.
8. Custom lengths & diameters available
Benefit: Eliminates material waste and fits unique equipment layouts perfectly. Quick turnaround for custom orders.
9. Lightweight & flexible
Benefit: Easy to handle, install, and route in tight spaces, overhead areas, or around machinery. Reduces labor costs.
10. Temperature range -20°C to +80°C
Benefit: Works reliably in both cold warehouses and hot industrial exhaust streams.
Application Scenario
The NUOENWEI PVC flexible exhaust duct is trusted by facility engineers and plant managers for:
Industrial exhaust ventilation – Factories, workshops, warehouses requiring removal of hot air, dust, or fumes.
Negative pressure dust collection systems – Connecting dust collectors to woodworking, grinding, or cement processing equipment.
Fume extraction in welding or laser cutting – Withstands sparks (flame retardant) and removes harmful smoke.
Chemical plant ventilation – Corrosion-resistant PVC handles mild acid/alkali exhaust.
Paint spray booth exhaust – Safe for solvent-laden air (check chemical compatibility for strong solvents).
Portable fans and blowers – Flexible connection between fan inlet and exhaust outlet.
Garage / auto repair shops – Vehicle exhaust extraction.
HVAC fresh air or return air (non-pressure side) – For negative pressure side only.
Agricultural and greenhouse ventilation – Corrosion resistance to fertilizers and moisture.
Frequently Asked Questions
Contact person: Elaine Guo
Tel.: +8615875732388
E-mail: sales@fsnuowei.com
Add: No. 39 Xingjiao Road, Hecheng Street, Gaoming District, Foshan City, Guangdong Province,China