Heavy Duty Mixed Flow Fan

Diagonal Impeller Geometry: Aerodynamically optimized blade profiles combine axial entry with centrifugal discharge to maximize pressure development and reduce turbulence losses.
Rigid Structural Housing: Formed from heavy-gauge carbon steel or structural stainless steel, reinforced with external stiffeners to eliminate casing deflection under high static loads.
Precision Dynamic Balancing: Impellers are balanced to ISO 1940 Grade 2.5 or better, minimizing mechanical vibration and extending bearing service life.
Robust Shaft and Bearing Assembly: Oversized steel shafts paired with heavy-duty cast-iron pillow block bearings rated for a minimum L10 life of 50,000 hours under continuous operation.
Corrosion-Resistant Protective Coating: Standard units undergo grit-blasting to ISO 8501-1 Sa 2.5, followed by a multi-layer industrial epoxy or high-temperature enamel finish. 

Working Principle
Air enters the fan axially along the drive shaft centerline. As the air passes through the diagonal-bladed impeller, kinetic energy is imparted by both the lift generated by the blades and the centrifugal force of the expanding flow path. The integrated stator vanes straighten the discharge air vector, converting rotational kinetic energy into static pressure before exhausting through the outlet duct.

Manufacturing & Quality Control
Cutting & Forming: CNC laser cutting and computer-controlled hydraulic press brakes maintain dimensional tolerances within ±0.2 mm for housing and blade components.
Welding Standards: Structural and pressure-retaining welds executed by certified welders in accordance with AWS D1.1 / ISO 3834 standards.
Non-Destructive Testing (NDT): Critical impeller welds undergo routine dye penetrant (PT) or magnetic particle (MT) inspection.
Factory Acceptance Testing: Every completed fan undergoes a 2-hour run test on a dedicated test bench to measure vibration velocity, motor current draw, operational temperature, and acoustic output. 

Tunnel & Underground Ventilation: Longitudinal and transverse ventilation systems requiring high pressure to overcome friction losses in long duct runs.
Industrial Process Exhaust: Corrosive or particulate-laden air extraction in chemical processing, metal finishing, and pulp and paper mills.
HVAC Air Handling Units: Centralized air distribution systems in large commercial complexes, airports, and industrial manufacturing plants.
Power Generation Facilities: Boiler room ventilation, turbine enclosure cooling, and flue gas auxiliary draft systems. 

High-Temperature Construction: Specialized metallurgy, external heat-slinger discs, and insulated housings for airstreams up to +250°C.
Explosion-Proof Configurations: ATEX or Class I, Division 1/2 compliant motors, spark-resistant non-ferrous bronze inlet cones, and grounding straps for hazardous explosive environments.
Sound Attenuation: Inlet/outlet silencers and acoustic insulation blankets to meet specific local noise criteria (down to 65 dBA at 1.5 meters).
Flow Control Accessories: Inlet guide vanes, motorized discharge dampers, flexible duct connectors, and vibration isolator spring mounts. 

To receive a detailed engineering proposal and performance curve submittal tailored to your specifications, please complete the technical parameters form below or submit your project data sheet directly to our application engineering desk.

Project Airflow Requirements (CFM or m3/h): [Form Field / Input Box]
Required Static Pressure (Pa or in.wg): [Form Field / Input Box]
Airstream Medium & Temperature: [Form Field / Input Box]
Electrical Supply (V / Hz / Phase): [Form Field / Input Box]
Optional Compliance / Certifications (ATEX, High-Temp, etc.): [Checkboxes / Input Box]
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