Precision engineered in our advanced facility in Dezhou, China. Directly supporting global EPC contractors, MEP designers, and mechanical system integrators.
Understanding the fluid mechanics, aerodynamic transition, and total pressure development of mixed-flow impellers over traditional axial and centrifugal layouts.
Mixed flow extractor fans merge the axial flow's high volumetric delivery with the radial pressure gradient of a centrifugal blower. The conical hub and diagonally inclined 3D twisted aerofoil blades guide incoming air through an oblique vector angle (typically 35° to 45°), effectively mitigating turbulent boundary layer separation and reducing vortex shedding noise.
Unlike standard axial units whose static pressure curves plummet rapidly as system resistance mounts, our custom mixed-flow casings incorporate integrated continuous-vane downstream diffusers. These stators convert high dynamic velocity vectors directly into usable static pressure head, delivering optimal duct-driving force while retaining straight-through inline duct simplicity.
By streamlining airflow smoothly through diagonal paths rather than right-angle 90° transitions, internal shock losses are practically eliminated. Coupled with dynamic balance calibration meeting ISO 1940 G2.5 standards and premium high-efficiency motors (IE3/IE4 standard), our units consistently consume 20-30% less power while providing whisper-quiet decibel levels.
Leveraging the robust industrial cluster of Dezhou, China—the epicenter of commercial HVAC, smoke extraction ventilation, and fluid management systems.
Over 12,000 m² of modern plant infrastructure. From CNC laser sheet profiling, automated hydraulic blade stamping, robotic seam welding, to electro-static powder curing—every process stage stays completely in-house to protect engineering tolerance and reduce intermediate markups.
Every commercial ventilation project exhibits unique resistance profiles. We provide tailored modifications across impeller diameters, casing gauges, motor insulation classes (Class H / F), voltages (220V/380V/415V/460V @ 50/60Hz), ATEX explosion-proof options, and bespoke dual-speed motors.
Each batch passes aerodynamic wind tunnel airflow tests (AMCA 210 standard compliant), precision vibration displacement testing, dynamic balance verification, high-pot insulation checks, and salt-spray corrosion resistance inspections to guarantee zero-defect international dispatches.
Situated centrally in Northern China with swift access to Qingdao, Tianjin, and Shanghai seaports. Comprehensive containerization optimization, seaworthy anti-moisture crating, full English documentation, and end-to-end export compliance eliminate customs clearance bottlenecks.
Where space is restricted and high pressure combined with low noise is non-negotiable, our mixed flow systems fulfill critical commercial and industrial duties.
Deep basement garages suffer from restrictive ceiling heights that prohibit bulky centrifugal fans. Compact inline mixed flow extractor fans provide extensive throw distances, driving out toxic Carbon Monoxide (CO) and combustible fumes through extended duct networks with minimal energy draw.
Certified for dual-use operational profiles: running at low-speed for constant silent day-to-day public space ventilation, while instantly shifting to emergency high-speed mode upon receiving BMS fire alarms. Capable of handling dense 280°C/300°C smoke exhaust for up to 60-120 minutes continuous run-time.
Semiconductor fabrication plants and GMP pharma facilities demand continuous laminar airflow through high-efficiency HEPA/ULPA banks. Our mixed-flow duct fans overcome intense filter media resistance while running vibration-free, stopping delicate process line micro-disturbances.
Standard parameters for baseline engineering reference. Custom impellers, specific voltage configurations, and higher static pressure options are tailored upon request.
| Model Series | Impeller Dia. (mm) | Airflow Capacity (m³/h) | Static Pressure (Pa) | Motor Power (kW) | Acoustic Rating dB(A) | Primary Duty Suitability |
|---|---|---|---|---|---|---|
| FD-MXF-300 | 300 | 1,200 – 2,400 | 180 – 320 | 0.37 – 0.75 | ≤ 56 | Commercial washrooms, small offices, inline duct boosting |
| FD-MXF-450 | 450 | 3,500 – 6,800 | 280 – 520 | 1.1 – 2.2 | ≤ 64 | Hotel kitchen branch exhaust, light industrial workshops |
| FD-MXF-600 | 600 | 7,800 – 14,500 | 410 – 760 | 3.0 – 5.5 | ≤ 72 | Underground car park ventilation, hospital air shafts |
| FD-MXF-800 | 800 | 16,000 – 29,000 | 520 – 980 | 7.5 – 15.0 | ≤ 79 | Shopping malls, airport concourses, plant main exhaust |
| FD-MXF-1000HD | 1000 | 32,000 – 55,000 | 650 – 1,250 | 18.5 – 37.0 | ≤ 85 | Heavy metro transit tunnels, fire smoke emergency shafts |
Modern EPC project stakeholders demand more than raw mechanical delivery. Discover how our product lifecycle aligns with decarbonization, modular assembly, and international certification.
With worldwide building energy codes (such as ASHRAE 90.1, EU ErP 2024 Tier directives) tightening, mechanical designers are transitioning to brushless Electronically Commutated (EC) and Permanent Magnet Synchronous Motors (PMSM). We offer plug-and-play variable speed control with up to 92% motor efficiency under partial load regimes.
Global contractors face rising domestic labor wages. Sourcing factory-preassembled extractor fan units equipped with matched flexible duct collars, spring anti-vibration mountings, integrated backdraft dampers, and pre-wired IP66 local disconnect isolator switches dramatically cuts site installation hours.
Global supply requires seamless certification bridging. Fengdun manufactures to strict ISO 9001 quality frameworks, offering product ranges validated against CE, GB/T fire-resistance criteria, and third-party inspection certifications via SGS, Bureau Veritas (BV), and TÜV prior to port departure.
Detailed answers to the most common technical, commercial, and operational questions asked by mechanical consulting engineers and international sourcing directors.
While an axial fan moves air parallel to the shaft utilizing lift on aerofoil blades, its static pressure generation is fundamentally constrained, causing it to stall when facing moderate-to-high duct resistance. A mixed flow fan integrates conical hub dynamics and curved blades that direct the air diagonally outward at a hybrid angle. This introduces centrifugal acceleration into an otherwise straight inline flow path, enabling the fan to generate up to 2.5 to 3 times greater static pressure head than an equivalent axial fan while preserving the space-saving in-line duct installation profile.
Yes. As a genuine source manufacturer based in Dezhou, we specialize in comprehensive mechanical and electrical tailoring. We provide standard configurations in 220V/380V/415V/460V across 50Hz and 60Hz grids. For hazardous areas, we supply ATEX/IECEx compliant explosion-proof motors and spark-resistant copper/aluminum lining. For dual-purpose emergency life-safety fire smoke ventilation, our fans feature high-grade Class H insulated motors and heat-treated structural steel housings engineered to withstand 280°C or 300°C for up to 2 hours uninterrupted duty.
Centrifugal blowers force air through a sharp 90-degree vector shift, generating intense internal shear turbulence and pressure pulses that translate into low-frequency tonal noise. Mixed flow units maintain a linear airflow trajectory. Air enters and departs along the same centerline axis with minimal wake perturbation. Combined with aerodynamically contoured guide vanes that smoothly decelerate the swirling discharge air and precision dynamic blade balance (ISO 1940 G2.5), mixed flow fans generally operate 6 to 12 dB(A) quieter than comparable centrifugal cabinet blowers at matching duty points.
To ensure optimal fan sizing and prevent operational surge or over-motoring, please provide: (1) Target Airflow Volume in m³/h or CFM; (2) External Static Pressure (ESP) in Pa or in. w.g.; (3) Operating Medium Temperature and environmental air properties (e.g., moisture, corrosive fumes, grease); (4) Desired Voltage, Phase, and Frequency; (5) Acoustic limits at a designated distance (e.g., 3m); and (6) Space or dimensional envelope constraints along the duct run.
All Fengdun mixed flow extractor fans carry a comprehensive 12 to 24-month operational warranty against manufacturing defects. Shipments are packaged in heavy-duty, moisture-barrier-wrapped, export-grade plywood crates constructed for maritime container shipment. Prior to loading, we welcome and regularly facilitate full third-party physical inspections and performance validation conducted by SGS, Bureau Veritas, or customer-appointed inspection engineers.
From mixed-flow inline exhaust to emergency fire smoke management, cooling towers, and modular storage tanks—discover our full manufacturing portfolio.
