The Heavy-Duty Mixed-Flow Fan is an inline ventilation fan designed for supply, exhaust, and continuous air circulation in medium- to high-resistance duct systems. Its mixed-flow impeller provides a combination of airflow and pressure for applications where conventional axial fan configurations may not provide the required operating point.
Technical Specifications & Engineering Downloads
|
Parameter |
Standard Range / Specification |
|
Airflow Capacity |
3,000 to 85,000 m3/h (1,800 to 50,000 CFM) |
|
Static Pressure |
Up to 2,500 Pa (10 in.wg) |
|
Impeller Diameter |
400 mm to 1,600 mm |
|
Operating Temperature |
-20°C to +85°C (Standard); up to +250°C (High-Temp configuration) |
|
Motor Power |
1.5 kW to 110 kW |
|
Voltage & Frequency |
380V/415V/480V, 50Hz / 60Hz, 3-Phase |
|
Casing Material |
Q235B Carbon Steel, 304 Stainless Steel, 316L Stainless Steel |
|
Drive Arrangement |
Direct Drive (Arrangement 4) or Belt Drive (Arrangement 9) |
|
Certifications |
ISO 9001, CE, AMCA Certified Performance (optional testing available) |
Impeller Design & Airflow Characteristics
Mixed-Flow Geometry: Curved blades combine axial and radial flow components to generate airflow and pressure within a compact inline fan configuration.
Integrated Guide Vanes: Downstream guide vanes reduce swirl and recover part of the rotational velocity into useful static pressure.
Hub Assembly: Machined steel hub secured with a standard keyway locking mechanism.
Casing Construction
Welded Construction: Continuously welded fan casing reinforced with structural steel angle stiffeners to limit shell deflection under high static pressures.
Motor Support Frame: Internal structural steel pedestal engineered to withstand operational torque and dynamic loads.
Inspection Access: A removable access panel can be provided for inspection and maintenance of internal components without removing the fan from the duct system, where applicable.
Operating Conditions
Air Medium Capability: Suitable configurations are available for clean air, non-abrasive dust, humid air, and selected non-flammable industrial exhaust gases. Fan material and sealing requirements depend on gas composition, temperature, and dust loading.
Altitude & Air Density Adjustments: Fan performance and motor selection are checked for high-altitude or high-temperature applications where changes in air density affect the required operating point and power.
Hazardous Locations: For applicable hazardous-area configurations, non-sparking components and appropriately certified motors can be specified according to the required area classification and local regulations.
Installation & Duct Connection
Flange Specification: Inlet and outlet flanges can be manufactured with specified bolt-hole patterns and dimensions for direct connection to the duct system.
Installation Orientation: Horizontal or vertical installation can be configured according to the fan design and site requirements.
Duct Compatibility: Flange configurations can be adapted for rigid steel ducts, spiral ducting, and flexible connectors.
Engineering Drawings: Dimensional summary sheets, total unit weights, flange hole patterns, and 2D CAD / 3D STEP models are provided during the technical review stage.
Engineering Support
Performance Adjustments: Impeller diameter, blade geometry or pitch, fan speed, and motor power can be configured to match the required airflow and system pressure.
Electrical Specifications: Custom motor brands, non-standard voltages (e.g., 575V, 660V), and special enclosure ratings integrated upon request.
System Accessories: Companion flanges, flexible connectors, inlet bell mouths, backdraft dampers, and inline silencers can be supplied as part of the fan package where required.
Customization Workflow: Project data review → Duty point calculation → Fan selection → GA drawing approval → Production → Factory inspection/testing → Packing and dispatch.
Pre-Production Samples: Prototype or first-article units can be discussed for engineering evaluation on qualified large-scale projects.
Delivery Support
Export Packaging: Steel-framed pallets or heavy wooden crates constructed for ocean freight and land transport.
Transit Protection: Exposed machined surfaces, motor terminals, and flange surfaces are protected against moisture, corrosion, and mechanical damage during transport.
Minimum Order Quantity (MOQ): 1 unit for project-specific orders; batch manufacturing options available for system integrators.
Production Lead Time: Standard configurations typically require 15–30 working days after technical specifications and drawings are finalized. Custom configurations may require additional production time.
Documentation Package: Documentation can include installation and maintenance manuals, motor connection diagrams, GA drawings, and applicable factory inspection or test reports.
Spare Parts Support: Replacement impellers, spare bearings, belts, and replacement motors supplied for long-term maintenance.
FAQ
Q: Can you provide a representative model-to-spec example?
A: An HDF-800 configuration can be supplied for approximately 25,000 m³/h at 800 Pa with a 15 kW motor, subject to the selected operating point and fan configuration. Final performance should be confirmed against the applicable fan performance curve.
Q: Do different impeller sizes use the same duct flange?
A: Not necessarily. Flange dimensions and bolt-hole patterns depend on the fan size and selected configuration. The applicable flange dimensions and drawings are confirmed during the technical review.
Q: Is CE certification included by default?
A: CE documentation is available for applicable configurations where required by the destination market. The relevant Declaration of Conformity and technical documentation are provided according to the supplied configuration.
Q: When should different drive arrangements be selected?
A: Drive arrangement is selected according to motor power, required speed, maintenance access, installation space, and transmission requirements. The appropriate arrangement is confirmed during technical selection based on the project duty point and installation conditions.
Q: How is the correct model selected?
A: Engineers calculate the duty point using duct resistance, target airflow, and gas temperature, then match it to the nearest standard impeller diameter and motor-power combination.
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