NUOENWEI High Temp Flex Duct | Industrial High Temperature Flexible Hose -45℃ to 300℃

Feature 1: Extreme Temperature Resilience

How it benefits you: The NUOENWEI High Temp Flex Duct maintains structural integrity and dimensional stability from sub-zero cold to sustained high heat. When selecting the insulated variant, the thermal barrier keeps heat inside the duct, maximizing energy transfer efficiency from your air heater or dryer to the target zone. This means faster drying cycles, lower fuel consumption on construction heaters, and safer operation for personnel.

Feature 2: External Abrasion-Resistant Steel Helix

How it benefits you: Traditional flexible ducts fail at the point of ground contact. Dragging a duct across a factory floor or construction site normally results in tears, pinholes, and catastrophic blowouts. The NUOENWEI high temp flex duct solves this permanently. The external spiral steel wire acts as a built-in skid rail. The duct can be selectively dragged, repositioned, and coiled without wearing through the fabric wall. This single feature extends service life by 3x–5x in abrasive environments such as concrete plants, foundries, and tunneling operations.

Feature 3: High Flexibility with Structural Integrity

How it benefits you: Despite its heavy-duty construction, the duct bends easily by hand. It can snake around machinery, through tight hatches, and into confined spaces without kinking or collapsing. The steel helix prevents flattening under negative pressure and supports the duct's own weight when suspended horizontally.

Feature 4: Chemical & Corrosion Resistance

How it benefits you: Fiberglass is inherently resistant to a wide range of chemicals. The NUOENWEI high temp flex duct handles acidic exhaust streams, alkaline dust, metal salts, and aggressive fumes without delamination or chemical attack. This makes it ideal for chemical processing plants, metal finishing operations, and battery manufacturing exhaust.

Feature 5: Flame Retardant & Fire Safe

How it benefits you: The fiberglass construction is inherently non-combustible. In applications involving hot exhaust gases, potential spark carryover, or proximity to ignition sources, this duct will not propagate flame. It meets stringent fire safety requirements for military, aviation, and industrial applications.

Feature 6: Versatile Insulation Options

How it benefits you: Choose the insulation level that matches your budget and performance requirements. The standard insulated model covers -45℃ to 300℃. Need more? Upgrade to the 400℃ continuous-rated variant. For extreme exhaust gas temperatures found in foundries, incinerators, or aerospace testing, inquire about the specialty 1200℃ rated construction. You control the thermal specification.

Feature 7: Customizable Aesthetics & Dimensions

How it benefits you: Standard colors (gray, yellow, black, blue) allow for color-coded airflow systems—hot air, cold air, exhaust, fresh air supply—improving on-site safety and organization. For OEMs and large-volume users, custom colors and private labeling are available. Inner diameters from 80mm to 1000mm ensure a perfect fit for your existing equipment flanges.

1. Temporary Heating & Ground Thawing

Portable gas and oil-fired indirect combustion air heaters produce large volumes of clean, hot air that must be delivered efficiently to building interiors, curing concrete slabs, or thawing frozen ground. The NUOENWEI High Temp Flex Duct connects directly to heater outlets, conveying high-temperature air over distances with minimal thermal loss thanks to the insulated wall. Construction crews rely on this duct for temporary heating of buildings under renovation, new builds during winter months, and ground thawing operations prior to excavation.

2. Ventilated Heater Exhaust & Combustion Gas Evacuation

For direct-fired or indirect-fired heaters that require exhaust gas routing, the NUOENWEI high temp flex duct functions as a safe, flame-retardant exhaust chimney. The fiberglass construction and external steel protection ensure that hot exhaust gases are vented outside the occupied space, preserving indoor air quality and preventing carbon monoxide buildup. The duct’s chemical resistance handles acidic combustion byproducts without degradation.

3. Plastics Industry – Granule Dryers & Hopper Loaders

Plastic resin dryers use heated air to remove moisture from hygroscopic pellets before injection molding or extrusion. The NUOENWEI high temp flex duct connects drying hoppers to process machines, withstanding the continuous elevated temperatures and occasional abrasive dust carryover. Its flexibility allows easy routing around injection molding machine frames and robotic systems.

4. Printing Press & Paper Converting Exhaust

High-speed web offset printing presses generate significant heat and emit solvent-laden air. The NUOENWEI high temp flex duct extracts hot exhaust air containing ink solvents and paper dust. The acid/alkali resistance of fiberglass ensures long life against mildly corrosive airborne chemicals found in print shops.

5. Blower, Compressor, and Vacuum Connections

Industrial blowers and compressors move large air volumes at elevated temperatures. The NUOENWEI high temp flex duct connects to blower discharge flanges, handling both positive pressure delivery and negative pressure vacuum extraction. The external steel helix prevents collapse under vacuum, a critical failure point for unreinforced ducting.

6. Engine Exhaust & Military Applications

In engine test cells, military vehicle maintenance bays, and aircraft ground support, high-temperature exhaust gases must be captured and vented safely. The NUOENWEI high temp flex duct in extreme-temperature configurations (up to 1200℃) handles jet engine bleed air, tank exhaust, and diesel generator exhaust. The abrasion-resistant exterior withstands dragging across tarmac and hangar floors. Military and aviation contractors specify this duct for its reliability under mission-critical conditions.

7. Dust, Fume & Fiber Extraction

Sawmills, textile mills, fiberglass fabrication shops, and metal grinding operations produce airborne dust, fibers, and fumes that are both abrasive and potentially combustible. The NUOENWEI high temp flex duct conveys these challenging media streams to baghouses, cyclone separators, or scrubbers. The smooth inner fiberglass liner minimizes static pressure loss and resists clogging from fibrous materials.

8. Chemical & Pharmaceutical Process Ventilation

Laboratory fume hoods, reactor vessels, and chemical storage tank vents require ducting that resists corrosion from acid gases, solvent vapors, and alkaline fumes. The NUOENWEI high temp flex duct provides a chemically inert, temperature-resilient pathway for contaminated exhaust air in pilot plants and full-scale chemical production facilities.