Precision Airflow Control — engineered ventilation systems delivering 1,300 to 28,000 m³/h across eleven diameter options, built for mining and tunnelling compliance where certified airflow is mandatory.
Technical Specifications
| Parameter | Value |
|---|---|
| Product Type | Axial Flow Fan |
| Size Options | 200mm / 250mm / 300mm / 350mm / 400mm / 450mm / 550mm / 650mm / 750mm / 850mm / 900mm |
| Power Range | 250W to 5500W |
| Air Volume Range | 1300 m³/h to 28000 m³/h |
| Total Pressure Range | 140 Pa to 320 Pa |
| Voltage | 220V/380V |
| Noise Level | 57 dB(A) to 88 dB(A) depending on model |
| Speed | 3000RPM |
| Duct Type | Flexible Duct Hose |
| Customization | Custom printing of brand and custom colors available |
| Certification | ISO, CE (verify product-specific scope) |
Application Suitability
| Application | Exposure & Requirement |
|---|---|
| Mining and tunnelling | Continuous fresh air supply to working face, underground compliance, anti-static and fire-retardant certification mandatory |
| Construction site exhaust | Dust and fume extraction from confined spaces, temporary duct runs, portable power supply |
| Aviation ground support | Welding fume and solvent vapour extraction in maintenance bays, fire-retardant material compliance |
| Industrial factory ventilation | General exhaust and air exchange, extended duct runs with pressure loss management |
Why Ventilation Certification Gaps Halt Your Project
Uncertified duct material stops work until the inspector signs off.
The industrial axial flow fan with flexible duct arrives on site, the crew connects it, and the safety officer asks for the fire-retardant test report. When the documentation does not match the specification the contractor bid on, work stops. Underground mining and tunnelling projects cannot proceed without verified ventilation compliance, and the cost of idle crews and delayed milestones compounds every day the gap remains open [NEED_CITE: fire-retardant and anti-static compliance requirements for underground ventilation per regional mining codes].
Matching Fan Pressure to Duct Length and Face Distance
Selecting the correct industrial axial flow fan with flexible duct requires calculating total system resistance. Each meter of flexible hose introduces friction loss, and every bend or coupling adds local pressure drop. A fan rated at 230 Pa total pressure can push air through extended runs, but undersizing the pressure for the actual duct layout means the working face receives less airflow than the ventilation plan specifies.
Air Volume Requirements Across Tunnel Cross-Sections
The air volume needed depends on tunnel cross-section area, face distance, and the dilution rate required for dust and gas control. Smaller diameter options in the 200mm to 400mm range serve maintenance bays and confined space entry. Larger diameters from 550mm to 900mm deliver the volume needed for active mining faces and long tunnelling drives where continuous fresh air supply is non-negotiable [NEED_CITE: ventilation air volume calculation methods for underground mining and tunnelling operations].
Understanding the Pressure and Volume Relationship
Total pressure and air volume work as a system. The fan curve shows that as duct resistance increases, actual delivered airflow decreases below the rated free-air value. A unit rated at 28,000 m³/h in open conditions will deliver less when pushing through 100 meters of flexible hose with multiple couplings. Sizing the fan requires matching both the volume requirement at the face and the pressure needed to overcome the total resistance of the installed duct run. The 220V/380V dual voltage configuration allows connection to either single-phase portable generators or three-phase industrial supply commonly available on established sites.
The Compliance Risk of Unverified Duct Material
Duct hose supplied without the fire-retardant or anti-static test results specified in the contract creates a documentation failure at the pre-start safety inspection. Underground sites require material certification matched to the applicable standard, and a missing or mismatched report means the entire ventilation installation is rejected until replacement material arrives. The delay affects not only the ventilation crew but every downstream activity dependent on certified airflow at the working face [NEED_CITE: documentation requirements for ventilation materials in underground construction and mining projects].
Sourcing Ventilation Systems With Verified Documentation
Each industrial ventilation duct and axial fan for mining and construction ships with documentation matched to the purchase specification. The material specification sheet confirms the duct fabric type, coating, and applicable test standards. Fire-retardant and anti-static test reports are provided where the duct material carries those treatments, allowing contractors to present verified compliance at safety inspections. Pre-shipment inspection records confirm fan performance parameters and duct seam integrity before dispatch, reducing the risk of arriving on site with equipment that fails the initial acceptance check.
Documentation & Verification
- Material specification sheet confirming duct fabric type, coating weight, and applicable test standards
- Fire-retardant and anti-static test reports matched to the duct material grade specified at order
- CE marking scope documentation covering fan motor and electrical assembly for destination market
- Pre-shipment inspection record confirming airflow, pressure, duct seam integrity, and connection hardware
- Voltage and wiring configuration certificate matching site power supply conditions
Fabrication, Handling & Storage
- Flexible duct hose sections connect via reinforced couplings — inspect each joint for airtight seal before commissioning
- Store duct coils in dry conditions away from direct sunlight to prevent coating degradation before installation
- Fan units require stable mounting on level ground to prevent vibration transfer through the 3000RPM motor assembly
- Custom-printed branding on duct fabric should avoid covering connection zones where coupling clamps seat
- Handle fan motors with care during transport — the 220V/380V electrical assembly is sensitive to impact damage
Request a System Quote With Your Site Parameters
Provide the duct run length, number of bends, and required airflow at the working face so we can match the correct fan pressure and diameter. Specify the fire-retardant or anti-static grade required by your site safety plan and destination market regulations. Include your site voltage supply and whether you need complete duct sections with couplings or individual components.
Frequently Asked Questions
Q: Does the flexible duct hose carry fire-retardant and anti-static certification for underground mining use?
A: Fire-retardant and anti-static treatments are available for the flexible duct hose. The applicable test standard and grade depend on your site requirements and destination market regulations. Confirm the specific certification your safety plan mandates so we can match the correct material grade and provide supporting test documentation with the shipment.
Q: What duct diameter and fan pressure are needed for a given tunnel length and face distance?
A: Duct diameter and fan pressure must be calculated based on tunnel cross-section, face distance, total duct run length, and the number of bends or couplings. Provide these parameters so we can recommend a fan and duct combination that delivers the required airflow at the working face while overcoming the total system resistance.
Q: Can the duct fabric be specified with flame-retardant treatment and supported by a test report?
A: The duct fabric can be produced with flame-retardant treatment matched to your specified grade. A test report supporting the stated flame-retardant classification is provided with the shipment documentation. Confirm the exact standard required for your market before production to ensure the material and documentation align with site compliance requirements.
Q: What voltage configuration is available for site power conditions?
A: The fan units are configured for 220V single-phase or 380V three-phase supply. Specify your site power conditions at the inquiry stage so the correct motor winding and electrical assembly are supplied. Dual-voltage site conditions should be confirmed to ensure compatibility with both portable generators and fixed industrial supply.
Q: How is batch consistency and seam durability ensured across multiple duct sections on a project?
A: Each production batch undergoes in-process quality checks covering coating consistency, seam weld integrity, and dimensional accuracy. Pre-shipment inspection records confirm these parameters before dispatch. For projects requiring multiple matched sections, specify the total quantity at order so production is scheduled as a single batch for consistent material and construction.
