Flexible airflow systems �� OEM & project supply
Flexible ducting configured around the blower you already use so crews can move fresh air in, draw unwanted air out, and relocate the air route as the job changes.
DERFLEX supplies completed portable ventilation duct assemblies for industrial blowers, temporary exhaust fans, confined-space work, maintenance shutdowns, construction, shipyards and mobile cooling. Diameter, length, reinforcement, cuffs, suspension and identification can be adjusted to the confirmed equipment interface and operating conditions.
Portable ventilation duct is flexible ducting used with a movable blower, extractor or temporary air-moving unit. Instead of installing fixed sheet-metal ductwork, the crew positions the fan in an accessible location and extends the flexible duct toward the area that needs fresh air, exhaust, cooling or drying airflow.
This makes the product relevant to contractors, safety-equipment distributors, fan manufacturers, rental fleets, shipyards, plant maintenance teams and industrial buyers who need a duct that can be packed, carried, connected and repositioned repeatedly.
A portable hose is not automatically suitable for every direction of airflow. When the blower pushes air through the duct, internal pressure helps keep a light layflat construction open. When a fan pulls air through the hose, negative pressure can collapse an unsupported tube. For extraction duty, a steel-wire helix or another shape-supporting structure is normally evaluated.
Nominal diameter alone does not define compatibility. The fan lip, guard position, flange depth, clamp space and chosen cuff all influence whether a portable ventilation hose installs quickly and stays in place. DERFLEX can review photos, dimensional sketches or an existing sample before confirming the cuff and connector.
The same outside appearance can hide very different pressure behavior. For portable ventilation, pressure mode is the first selection filter.
Forcing air from the blower toward the work zone. A collapsible or lightly reinforced construction can reduce packed volume and handling effort.
When the fan pulls contaminated or heated air away, the duct needs enough structural support to resist collapse and maintain an open bore.
Some rental fleets and maintenance teams want one duct style that can serve either side of a portable fan. A reinforced design is usually reviewed for this duty.
Use this table as a discussion framework. Final construction, dimensions and test values should be confirmed on the approved quotation, sample and technical data sheet.
| Finished product | Portable flexible ventilation duct assembly for axial blowers, exhaust fans and temporary air-moving equipment. |
|---|---|
| Body material | Woven or knitted polyester technical textile with PVC coating on both sides; formulation selected according to handling and environment. |
| Structure options | Layflat positive-pressure construction, spiral wire-reinforced suction/exhaust construction, or customized reinforced format. |
| Diameter | Matched to blower outlet. DERFLEX uses a 300�C3000 mm project-reference range for its flexible duct program; smaller portable-fan interfaces can be evaluated against equipment dimensions. |
| Section length | 5 m, 10 m, 15 m, 20 m or custom sections. Portable systems can be divided into shorter modules where handling and replacement are priorities. |
| Body-material weight | Approximately 300�C900 g/m2 reference range, selected according to portability, abrasion exposure, pressure and required reinforcement. |
| Temperature reference | Common PVC construction approximately ?20��C to +80��C. Alternative material systems should be reviewed for more severe hot-air or cold-weather service. |
| Connection options | Drawstring or rope cuff, clamp cuff, steel ring, zipper with protective overlap, belt and buckle, hook-and-loop overlap, or buyer-specified connector. |
| Suspension / handling | D-rings, eyelets, hooks, webbing loops, tabs, carry straps, or custom suspension spacing according to route and crew workflow. |
| Seam construction | Hot-air or high-frequency welded seams; sewn and sealed details can be considered where material or geometry requires them. |
| Functional options | Flame-retardant, antistatic, anti-UV, anti-cold, abrasion-focused or project-specific formulations subject to agreed performance criteria and test method. |
| Color / identification | High-visibility yellow or orange, plus blue, green, black or project colors; logo, part number, airflow arrows and section IDs can be printed. |
| Packing | Compressed bundle, storage sack, carry bag, carton or pallet according to diameter, section length and export plan. |
Safety note: flame-retardant, antistatic, pressure and temperature performance applies only to the confirmed product construction and specified test route. Confined-space or hazardous-atmosphere ventilation must be designed and operated under applicable site procedures by qualified personnel.
Portable ventilation equipment is repeatedly connected, dragged, suspended, compressed and stored. The finished duct should therefore be designed for the crew��not only for the material datasheet.
Specify the fan outlet outside diameter, lip depth and available clamping area so the inlet cuff can be dimensioned for the actual machine.
External contact bands can protect the wire path and high-contact areas when the duct is pulled over floors, steel edges or access openings.
Zippers, belts, rings and clamps can be selected to balance setup speed, leakage control and compatibility with an existing duct fleet.
D-rings, eyelets, hooks or webbing tabs can be spaced around horizontal runs, vertical drops, scaffolding or temporary support lines.
Diameter, section number, buyer code, airflow direction and inspection marks help operators control portable duct inventories and replacements.
Compressed bundles, handling straps or storage bags can be planned around crew size, service vehicles and frequency of deployment.
These applications share one requirement: the air route changes often enough that rigid ductwork becomes inconvenient, slow or unnecessarily permanent.
Temporary fresh-air delivery or extraction around tanks, manholes, utility chambers and access shafts as part of a site-controlled ventilation procedure.
Flexible routing for temporary fume, heat or odor movement during shutdowns, repair work, coating and fabrication tasks.
Portable air movement for interior fit-outs, crawl spaces, temporary enclosures, drying, cooling and work areas without fixed ventilation.
Move air into or out of compartments and service areas where crews need flexible ducting that can pass through constrained access points.
Portable branches, fan connections or short-term air routes for equipment maintenance, localized ventilation and changing underground work areas.
Direct high-volume air toward wet areas, machinery, cable zones, event structures or temporary HVAC points without installing permanent ductwork.
Sending the right information at the start helps reduce back-and-forth and makes sample approval easier for contractors, distributors and equipment brands.
Outlet outside diameter, shape, lip depth, flange, guard interference and preferred attachment method.
Confirm whether the duct will be used for supply, extraction or reversible operation.
Total length, bend count, vertical drops, access opening size and expected suspension arrangement.
State abrasion, moisture, oils, chemicals, heat, cold, sparks, UV exposure and any static-control concerns.
Fast setup, lowest packed volume, lower leakage, frequent relocation or compatibility with existing sections.
Quantity, private label, printed marks, storage bag, carton requirement, destination and requested inspection documents.
DERFLEX can coordinate material, reinforcement, fabrication and connection details as one finished-product program rather than leaving the buyer to assemble unrelated components.
PVC-coated textile weight and formulation are reviewed around portability, abrasion, weather exposure and requested functional treatment.
Diameter, section length, cuff geometry, wire pitch and suspension spacing can be checked against approved drawings or samples.
Welded or sealed seams, rings, cuffs, zippers, belts and clamp areas can be inspected as finished-product details.
Part numbers, logo marks, airflow arrows, storage bags and carton labels can support distributors, blower brands and replacement programs.
Custom portable ventilation duct programs can cover diameter, section length, wire or ring reinforcement, cuff geometry, connection type, suspension hardware, color, printed branding, airflow arrows, identification labels, storage bag and export packing. For OEM or replacement orders, a reference sample or fan-outlet drawing can help align the new duct with the buyer��s existing equipment.
When flame-retardant, antistatic or other functional performance is required, the requested standard and test method should be identified before quotation. This keeps the commercial specification tied to a defined construction rather than a broad marketing label.
Use these internal resources to compare portable ducting with other pressure modes, project scales and safety-oriented configurations.
Answers are written for product selection and procurement. Final suitability depends on the confirmed duct construction and the complete ventilation system.
A portable ventilation duct is a flexible hose or collapsible duct used with a movable fan or blower to extend fresh-air supply, exhaust, cooling or drying airflow to a changing work area. It is commonly selected where fixed metal ductwork would be slow to install or difficult to relocate.
It can be configured for both, but negative-pressure extraction normally requires a supported structure such as a steel-wire helix so the duct does not collapse. The blower performance, route and connections should be checked for both airflow directions before the construction is confirmed.
Send the actual outside diameter of the outlet, the usable cuff or clamping length, flange or guard details and your preferred connector. Nominal fan size is useful for orientation, but the measured interface is more reliable for production.
Layflat ducting relies mainly on positive pressure to inflate and is attractive where compact transport is important. Spiral wire-reinforced ducting retains a round bore and is usually more appropriate for suction, exhaust, bends and frequent repositioning.
Optional flame-retardant and antistatic constructions can be developed when the required performance limit and test method are defined. The complete system��including grounding where relevant��should be evaluated for the intended worksite rather than relying on a material label alone.
Yes, these are common project variables. DERFLEX can review drawstring cuffs, clamp cuffs, rings, belts, zippers, suspension points, printed identification and storage formats according to the duct diameter, crew workflow and existing equipment.
Provide blower outlet dimensions, airflow direction, diameter, section length, route layout, connection method, environment, temperature, required functional treatment, quantity, branding or packing requirements, destination and any requested test or inspection documents.
DERFLEX can review the portable ventilation duct structure, cuff, section length, reinforcement and handling details for your OEM, contractor, distributor or project requirement.