Dedicated QA/QC at every production stage — from incoming material check to pre-shipment verification, ensuring each portable axial flow exhaust fan unit meets documented air volume and pressure requirements before dispatch.
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 (varies by size) |
| Air Volume Range | 1300 mÂł/h to 28000 mÂł/h (varies by size) |
| Total Pressure Range | 140 Pa to 320 Pa (varies by size) |
| Voltage | 220V / 380V |
| Noise Level | 57–88 dB(A) (varies by size) |
| Bearing Type | Ball Bearing |
| Housing Material | Cast Iron |
| Customization | ODM Available |
Application Suitability
| Application | Exposure & Requirement |
|---|---|
| Truck loading bay ventilation | Continuous exhaust of diesel fumes and particulate matter in semi-enclosed docking areas; fan must run for extended shifts without thermal overload |
| Transport workshop maintenance bays | Removal of solvent vapours and welding fumes from confined repair pits; equipment exposed to oil mist and mechanical impact |
| Enclosed trailer interior airing | Temporary air exchange before loading temperature-sensitive cargo; portable deployment with flexible duct connection |
| Roadside emergency ventilation | Rapid setup at incident sites where vehicle cargo compartments require forced air movement; equipment subject to transport vibration and weather exposure |
Why Air Volume Claims Without System Resistance Data Lead to Undersized Fan Selection
A fan rated at 1300 m³/h in free air may deliver substantially less when connected to ducting with bends, filters, or length. Selecting a portable axial flow exhaust fan based on catalogue air volume alone — without calculating the total pressure loss across the duct run — is a recurring cause of inadequate ventilation on transport sites and in confined maintenance areas.
Buyers frequently specify the fan size that matches their workspace volume, then discover the installed system cannot move enough air once connected to the actual duct layout. The gap between free-air performance and installed performance grows with every elbow, transition, and metre of flexible duct added to the system [NEED_CITE: system resistance calculation methods for axial fan installations per ISO 5801]. When the portable axial flow exhaust fan is undersized, operators compensate by running units continuously at maximum load, accelerating bearing wear and increasing noise exposure beyond occupational limits.
Matching Fan Size to Duct Run Configuration in Transport Ventilation
The eleven available sizes — from 200mm through 900mm — allow the axial flow exhaust fan to be matched not just to the workspace volume but to the specific duct diameter and run length found in transport maintenance facilities. A 300mm unit may be sufficient for spot ventilation inside a trailer body, while a 650mm or larger unit is typically needed when pushing air through extended flexible duct runs that serve multiple enclosed bays simultaneously. The portable ventilation blower custom configuration options allow ODM modifications to inlet and outlet flanges so the fan connects directly to existing duct infrastructure without adapters that add pressure loss.
Dual Voltage Compatibility for Multi-Site Transport Fleets
Transport operators running maintenance depots across different regions face inconsistent power supply configurations. The 220V/380V compatibility across the range means a fleet operator can standardize on a single axial flow exhaust fan manufacturer and deploy units across sites with varying electrical infrastructure without sourcing transformers or maintaining separate spare parts inventories. This dual voltage support is particularly relevant for cross-border logistics companies managing workshops in multiple countries.
Interpreting Air Volume, Pressure, and Noise as an Integrated Specification Set
Air volume (m³/h) and total pressure (Pa) must be evaluated together: a higher air volume at low total pressure indicates the fan moves large quantities of air over short duct runs with minimal resistance, while higher total pressure at lower volume suits longer duct runs with bends and restrictions. The ball bearing construction supports sustained rotational speed under continuous load, which maintains rated air volume output over the service interval rather than degrading as sleeve bearing alternatives do. Cast iron housing adds mass that dampens vibration-induced noise transmission through the mounting surface, though the 57–88 dB(A) range across sizes means occupational hearing protection assessment is still required for the larger units operating in enclosed spaces [NEED_CITE: occupational noise exposure limits and measurement methods per ISO 9612]. Noise level correlates with both fan diameter and rotational speed; a larger fan running at lower RPM often delivers equivalent air volume at lower dB(A) than a smaller fan running faster.
The Cost of Specifying the Wrong Fan Size for Your Duct System
When a transport workshop installs a fan with insufficient total pressure for its duct layout, the immediate symptom is weak airflow at the duct outlet. The less visible consequence is that the motor operates against a backpressure it was not sized for, which increases winding temperature and shortens bearing service intervals. Fleet maintenance managers then face a cycle of premature motor replacement and repeated downtime across the ventilation system [NEED_CITE: axial fan motor thermal stress under off-design operating conditions]. The correction almost always costs more than specifying the correct size initially, because it involves replacing not only the fan but potentially resizing the duct connections and updating the electrical circuit to handle a higher power unit.
Why Procuring Ventilation Equipment Through This Supply Chain Differs
Three full production lines and 36 sets of professional equipment support batch manufacturing of axial flow exhaust fan units alongside the industrial duct and coated fabric product families, enabling consolidated shipment of fans and matching flexible duct in a single container. The 10-person R&D team handles ODM requests including voltage reconfiguration, housing material substitution, and inlet/outlet flange modification — samples developed within days for fitment verification against the buyer’s existing duct infrastructure. A dedicated QA/QC process inspects each unit before dispatch, with air volume and pressure measured against stated specifications rather than relying on type-test data from a reference sample. Pre-shipment inspection records accompany every order, documenting the actual measured performance of the specific units being shipped. Material specification sheets and certification documentation are compiled per order to match the buyer’s site compliance requirements.
Documentation & Verification
- Material specification sheet stating voltage, power rating, and size for each fan unit ordered
- Pre-shipment inspection record with measured air volume and total pressure per unit
- Noise level test data referenced to dB(A) at stated measurement distance
- Certification documentation matching the compliance framework required at the installation site
- Packing list cross-referencing fan serial numbers to purchase order line items
- Certificate of origin prepared for customs clearance at destination country
Fabrication, Handling & Storage
- Mount cast iron housing units on vibration-isolating pads to prevent resonance transfer to steel workshop floors
- Verify 220V or 380V wiring matches site supply before first energization to avoid motor winding damage
- Store units upright on original pallets; horizontal stacking risks housing deformation on larger diameter sizes
- Connect flexible duct with matching diameter clamps; undersized adapters increase system resistance and reduce delivered airflow
- Inspect ball bearing grease condition after extended storage periods before commissioning
- Route power cables away from fan inlet to prevent airflow obstruction and cable abrasion
Requesting a Specification Match for Your Ventilation Project
Provide the duct run length, number of bends, and required airflow at the duct outlet so the correct size and pressure rating can be confirmed from the available range. Specify whether the installation site operates on 220V or 380V supply and note any regional certification framework the unit must comply with. Indicate whether the axial flow exhaust fan will be paired with fire-retardant or anti-static flexible ducting, as this affects both the fan specification and the documentation package provided.
Frequently Asked Questions
Q: How do I match fan air volume and pressure to flexible ventilation duct resistance?
A: Calculate the total pressure loss across your duct run including straight length, bends, and transitions. Compare this system resistance against the fan’s total pressure range at the required air volume. Select the size that delivers the target airflow at your calculated system pressure. Our team can review your duct layout and recommend the appropriate unit from the 200mm to 900mm range.
Q: What certifications are provided for confined-space ventilation compliance?
A: Certification documentation is compiled per order based on the compliance framework required at your installation site. Specify the regulatory standard your operation must meet during inquiry stage, and the corresponding certificates will be included in the dispatch documentation package alongside pre-shipment inspection records.
Q: What ODM customization options are available for voltage, housing, and connectors?
A: ODM modifications include voltage reconfiguration beyond the standard 220V/380V options, housing material alternatives, and custom inlet or outlet flange dimensions to match your existing duct infrastructure. Samples are developed within days for fitment verification before production proceeds on the full order quantity.
Q: How do I pair axial fans with fire-retardant or anti-static ventilation ducting?
A: When pairing with fire-retardant or anti-static duct systems, specify both the duct compliance grade and the fan certification requirements together. This ensures the complete ventilation assembly — fan and ducting — meets site safety standards. Documentation for both components is provided in a single package with cross-referenced specifications.
