Fresh-Air Supply
For positive pressure, a layflat or lightly reinforced duct can inflate under airflow and deliver air with low storage volume. It is useful where portability, fast extension and simple suspension are priorities.
Flexible Ventilation Duct
Portable Industrial Blower Duct
Portable industrial blower duct for fresh-air supply, fume extraction, drying and confined-space ventilation. Finished PVC flexible duct with custom diameter, length, couplings, flame-retardant and antistatic options from DERFLEX.
Description
Finished Ventilation Product
Portable Industrial Blower Duct
A collapsible, jobsite-ready flexible duct for connecting portable axial blowers, exhaust fans and temporary air-moving equipment to the exact area where fresh air, extraction or drying airflow is required.
DERFLEX supplies the completed duct assembly—not only coated textile—including the duct body, seams, reinforcement, couplings, suspension points and optional storage solution.
300–3000 mmProject-reference custom diameter range
5–20 m+Typical section lengths, customized by deployment
Supply / ExhaustConstruction selected for airflow direction
Fast DeploymentCollapsible format with practical connectors
Product Definition
What Is a Portable Industrial Blower Duct?
A portable industrial blower duct is a flexible airflow conduit used to extend the reach of a portable fan or blower. The blower remains in a practical and accessible location while the duct carries air into—or extracts air from—a tank, manhole, basement, workshop bay, tunnel heading, vessel, utility chamber or temporary enclosure.
The assembly typically combines a PVC-coated polyester body with welded or sewn seams, connection cuffs and either a layflat structure or a steel-wire helix. The correct construction depends on whether the system is pushing air, pulling air or alternating between both modes.
Why buyers specify a finished duct instead of fabric alone
Airflow performance is influenced by more than the coated textile. Diameter consistency, seam quality, helix pitch, coupling fit, suspension layout and bend behavior all affect leakage, pressure loss, handling and service life. DERFLEX therefore develops the duct as a complete component matched to the buyer’s blower and operating method.
- Light enough for mobile crews
- Flexible around changing layouts
- Replaceable without rigid-duct work
- Compact for storage and shipment
- Custom interface to blower outlet
- Options for demanding environments
Airflow Direction Matters
Select the Duct Structure Before You Select the Color
The first engineering decision is whether the blower pushes air through the duct, extracts air through it, or must support both operating modes.
Fume or Dust Extraction
Negative pressure can collapse an unsupported tube. A continuous helix or closely spaced support structure helps keep the airway open while the blower removes smoke, vapor, dust-laden air or process heat.
Reversible Ventilation
Where crews may alternate between supply and exhaust, a wire-reinforced design is generally the safer specification. Couplings, seams and blower interface should be reviewed for both airflow directions.
Available Constructions
Three Practical Product Formats
DERFLEX can adjust the finished duct architecture to portable blowers, temporary ventilation layouts and project-specific risk controls.
Layflat Positive-Pressure Duct
Collapses nearly flat when the blower is off, reducing storage space and transport weight. Best suited to forced-air supply where suction resistance is not required.
- Low packed volume
- Quick section deployment
- Ring, zipper or belt coupling options
Spiral Wire-Reinforced Duct
A helical wire supports the round bore during extraction, bending and frequent repositioning. External wear strips can protect high-contact areas and cover the wire path.
- Maintains shape under suction
- Suitable for tighter routing
- Compressible accordion-style storage
Flame-Retardant or Conductive Duct
For mines, tunnels, maintenance shutdowns or potentially hazardous areas, the duct body can be configured with specified flame-retardant or antistatic characteristics.
- Test method agreed before production
- Grounding details coordinated with system
- Final documentation based on order scope
Technical Configuration
Portable Blower Duct Specification Range
The table combines finished-product parameters with project-reference material attributes. Final values are confirmed against diameter, airflow direction, pressure, coupling and requested test method.
| Product form | Finished flexible ventilation duct assembly for portable industrial blower or exhaust fan |
|---|---|
| Duct structure | Layflat positive-pressure duct; spiral wire-reinforced suction/exhaust duct; custom reinforced assembly |
| Body material | Woven or knitted polyester technical textile, PVC coated on both sides |
| Diameter | 300–3000 mm project-reference range; smaller portable-blower diameters may be evaluated to suit the equipment interface |
| Section length | 5 m, 10 m, 15 m, 20 m or custom sections; long runs divided according to handling and pressure-loss requirements |
| Weight | Approximately 300–900 g/m² body-material range, selected according to portability, pressure and abrasion exposure |
| Operating temperature | Common PVC construction reference: approximately −20°C to +80°C; alternative materials should be evaluated for more severe temperatures |
| Connection options | Steel ring and rope, zipper with protective sleeve, belt and buckle, clamp cuff, hook-and-loop overlap, or buyer-specified quick connector |
| Suspension | Eyelets, hooks, tabs, webbing loops or dual suspension fins at agreed spacing |
| Seam method | Hot-air or high-frequency welded seams; sewn and sealed construction where the selected material or geometry requires it |
| Optional surface resistance | Antistatic configuration reference below 3 × 108 Ω, subject to agreed test method and complete grounding design |
| Wind-pressure reference | 3000–10000 Pa material/assembly reference range, dependent on diameter, reinforcement, seam layout and test conditions |
| Optional flame behavior | Formulations can be developed for agreed requirements such as DIN 4102, UL94 or regional project standards; compliance applies only to tested configuration |
| Colors and branding | Yellow, orange, blue, green, black and custom colors; printed logo, identification marks, direction arrows and private-label packaging |
| Packing | Compressed bundle, storage sack, carton or pallet according to duct diameter and shipment plan |
Specification notice: figures shown are selection references rather than universal guarantees. Confirm the final data sheet, sample, test standard and complete ventilation-system suitability before procurement or site use.
Where It Is Used
Applications for Mobile Air Supply and Extraction
A portable duct allows one blower platform to serve changing work locations without installing permanent rigid pipe.
Confined-Space Entry
Routes fresh air toward manholes, tanks, utility chambers and access shafts. The complete entry procedure and atmosphere monitoring remain the responsibility of the site safety team.
Welding and Fabrication
Positions extraction closer to temporary welding, grinding or coating work, helping move process fumes toward a designated discharge or filtration system.
Construction and Renovation
Supports temporary airflow in basements, crawl spaces, interior fit-outs and areas where dust, heat or coating odors need controlled movement.
Shipyard and Vessel Work
Extends blower reach into compartments and maintenance zones where rigid ducts are difficult to move or install.
Mining and Tunneling
Provides a portable branch or temporary ventilation line for underground work areas, equipment service and short-term air-routing requirements.
Drying and Equipment Cooling
Directs high-volume air toward wet floors, machinery, cable spaces or temporary enclosures during maintenance and restoration work.
Engineering Starting Point
Estimate the Required Air Volume
For a simple space-air-change estimate, buyers often start with room volume and the target number of air changes per hour.
Required airflow (m³/h) = Space volume (m³) × Target air changes per hour
Example: a 240 m³ work area at 10 air changes per hour starts at 2400 m³/h before accounting for duct friction, bends, leakage, filters and actual contaminant-control requirements.
This is a planning example only. Confined-space and hazardous-fume ventilation must be designed and verified by qualified personnel under applicable local rules.
Procurement Checklist
Six Details That Prevent a Mismatched Duct
- Blower outlet: provide outside diameter, flange geometry, clamp area and any adapter drawing.
- Airflow mode: confirm supply, exhaust or reversible use so the support structure can be selected correctly.
- Required route: state total length, number of bends, vertical drops and whether the duct must pass through an access opening.
- Work environment: identify abrasion, oil, chemicals, heat, cold, moisture, sparks, static-control or outdoor exposure.
- Connection method: select fast deployment, lowest leakage, tool-free handling or compatibility with an existing fleet.
- Documentation: identify the requested test standard, inspection plan, labeling, traceability and packing before production.
Connection and Handling
Details That Improve Jobsite Usability
Portable ventilation equipment is moved, extended and stored repeatedly. Small design decisions can reduce setup time and avoid premature damage.
Blower-Matched Inlet Cuff
The connection section can be dimensioned for direct clamping, ring attachment, zipper sleeve or an adapter. A close, stable fit helps reduce leakage and accidental separation.
Protected Helix and Wear Zones
Black wear strips or reinforced contact bands can cover wire paths and protect areas dragged across floors, scaffold edges or access openings.
Section-to-Section Coupling
Long routes are easier to manage as modular sections. Zippers with sleeves, rings, straps or clamps can balance deployment speed and leakage control.
Suspension Layout
Hooks, eyelets, tabs or webbing loops can be spaced for horizontal suspension, vertical drops or temporary routing around equipment.
Identification and Direction Marks
Printed size, section number, airflow arrow, buyer code and inspection information can simplify fleet control and replacement ordering.
Storage and Transport
Compressed storage sacks, carry straps and cartons can be designed around the crew size, service vehicle and frequency of deployment.
Manufacturing Approach
From Coated Textile to Completed Duct Assembly
DERFLEX combines coated-fabric manufacturing knowledge with finished-product construction. This allows material weight, flexibility, reinforcement, seam method and surface properties to be reviewed together instead of being purchased as disconnected components.
Quality planning can include incoming textile checks, dimension control, seam inspection, coupling verification, visual examination, packing review and agreed sample or pressure testing. The exact inspection plan is established according to the order and intended application.
Why DERFLEX
A Practical Supplier for OEM and Project Duct Programs
DERFLEX supports buyers who need repeatable duct construction, application-specific options and coordinated export supply rather than an off-the-shelf hose with no configuration review.
Material + Product Integration
Coated textile, reinforcement, seam and connector can be developed as one system, supporting better alignment between performance targets and finished-product handling.
Custom Program Support
Diameter, length, color, logo, cuff, suspension, storage bag, carton marks and private-label presentation can be adjusted for distributors, equipment brands and contractors.
Clear Pre-Production Confirmation
Drawings, reference samples and specification sheets can be reviewed before bulk production, reducing ambiguity around connection dimensions and construction details.
Related Ventilation Solutions
Continue Your Product Selection
These related pages help buyers compare pressure mode, geometry and safety-oriented configurations within the DERFLEX ventilation duct range.
FAQ
Portable Industrial Blower Duct Questions
Answers focused on buyer selection, system compatibility and finished-product configuration.
Is this page for a completed duct or only PVC duct fabric?
It is for a completed portable industrial blower duct. The supplied product can include the duct body, welded or sewn seams, wire reinforcement where required, end cuffs, couplings, suspension points, identification and packing.
Can one duct be used for both blowing and extraction?
Yes, but it normally needs a wire-reinforced or otherwise supported structure so it does not collapse under negative pressure. The blower’s performance and the full routing should be checked in both directions.
How do I match the duct to my portable blower?
Provide the blower outlet diameter, shape, cuff length, any flange or guard interference, and your preferred attachment method. A photo and dimensioned sketch are useful for confirming the connection.
What duct length should I order?
Choose the shortest practical route that reaches the work zone, then allow for bends and positioning. Longer ducts and sharp bends increase pressure loss. Modular sections can be easier to deploy and replace than one very long section.
Can DERFLEX make flame-retardant or antistatic blower ducting?
Optional flame-retardant and antistatic configurations are available. The requested test method, limit, grounding design and final product construction must be agreed before production; a conductive duct alone does not make the entire ventilation system suitable for a hazardous location.
Which coupling is fastest for temporary ventilation?
Belt-and-buckle, clamp cuffs and zipper systems are common fast-deployment choices. The best option depends on leakage tolerance, crew gloves, section diameter and compatibility with existing ducts.
Can the duct be branded for an equipment company or distributor?
Yes. DERFLEX can support custom color, printed logo, part number, airflow arrow, section identification, storage bag and private-label carton information, subject to the confirmed order specification.
What information is needed for a quotation?
Please provide diameter, section length, airflow direction, blower interface, estimated airflow or pressure, environment, temperature, coupling, suspension, color, quantity, requested standards and destination.
Configure a Duct That Fits Your Blower
Send the blower outlet dimensions, airflow direction, required route and work environment. DERFLEX will review an appropriate finished-duct structure, connection and specification for quotation.
Product information is provided for procurement discussion. Final suitability, testing, regulatory compliance and safe op, eration depend on the confirmed product configuration and the complete ventilation system used at the site.
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