Mixed Flow Fans

Product Overview

Industrial Mixed Flow Fans bridge the gap between axial and centrifugal fan performance profiles. By merging axial-type intake vectors with centrifugal-type radial discharge, these units develop static pressures up to 2.5 times higher than standard axial fans of identical impeller diameter while maintaining compact inline duct footprints.
Engineered for continuous-duty commercial and industrial ventilation infrastructure, standard configurations operate across airflow capacities from 800 to 18,000 m3/h (470 to 10,600 CFM). They integrate directly into rectangular or circular duct networks, serving primary roles in centralized air handling units, commercial kitchen exhaust systems, industrial process cooling, and data center auxiliary ventilation.

Mixed Flow Exhaust Fan
The Mixed Flow Exhaust Fan bridges the performance gap between standard axial fans and heavy centrifugal units. By utilizing a diagonal impeller blade profile, air enters axially and is discharged...
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Mixed Flow Ventilation Fan
The Industrial Mixed Flow Ventilation Fan bridges the performance gap between axial and centrifugal fans. Engineered for inline duct configurations, the impeller combines axial-flow blade angles...
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Heavy Duty Mixed Flow Fan
The Heavy Duty Mixed Flow Fan bridges the performance gap between traditional axial and centrifugal fans. By channeling air through a diagonal impeller path, this unit generates higher static...
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Industrial Mixed Flow Fan
An industrial mixed flow fan bridges the performance gap between axial and centrifugal fans. The diagonal aerodynamic impeller discharges air at an angle to the axis of rotation, combining axial...
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High Pressure Mixed Flow Fan
The high pressure mixed flow fan bridges the performance gap between traditional axial and centrifugal blowers. Engineered for ducted ventilation networks requiring high static pressure, this unit...
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Mixed Flow Inline Fan
The mixed flow inline fan bridges the performance gap between traditional axial and centrifugal fans.
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Key Features

Dual-Performance Aerodynamics: Impeller blade geometry converts kinetic energy into static pressure efficiently, preventing stall conditions in high-resistance duct networks.

Inline Space Efficiency: Straight-through airflow design eliminates the 90° elbow footprint required by typical centrifugal scroll housings, cutting installation clearance requirements by up to 40%.

High Static Pressure Capability: Generates sufficient pressure head to overcome friction losses through long duct runs, filtration banks, and sound attenuators.

Variable Speed Integration: Fully compatible with standard 0-10V, PWM, or Modbus control protocols when paired with high-efficiency EC (Electronically Commutated) motors.

Vibration Isolation: Dynamically balanced rotor assemblies (meeting ISO 1940 Grade G2.5) minimize mechanical resonance, extending bearing and housing service life.

Technical Specifications

Parameter	Specification Range / Value	Test Standard / Condition
Airflow Capacity (Q)	800 - 18,000 m3/h (470 - 10,600 CFM)	ISO 5801 / AMCA 210 Chamber
Static Pressure (Ps)	Up to 1,200 Pa (4.8 in.wg)	ISO 5801 Performance Curve
Impeller Diameter	315 mm - 1,000 mm	Precision Laser Cut / Stamped
Acoustic Output	48 - 74 dB(A) @ 3 meters	ISO 3744 Free Field Reverberant
Motor Input Voltage	220V - 240V (1Ph), 380V - 480V (3Ph), 50/60Hz	IEC 60038 Electrical Grid
Motor Technology	AC External Rotor / High-Efficiency EC Motor	IE4 Equivalent Efficiency (EC variants)
Ingress Protection (IP)	IP54 to IP55 Terminal Box & Motor Enclosure	IEC 60529 Dust/Water Resistance
Operating Temperature	-25°C to +60°C (Standard Duty)	Continuous Ambient Load

Construction & Working Principle

Working Principle
Air enters the impeller axially, where the mixed-flow blades impart both axial and radial velocity components. As air passes through the specially angled blade channels, centrifugal force increases angular momentum, and the downstream stator vanes straighten the rotational vector into a parallel axial flow. This conversion transforms dynamic velocity pressure into high static pressure within a compact cylindrical housing.

Material & Structural Build
Casing: Manufactured from heavy-gauge carbon steel (2.0 mm - 3.5 mm thickness) finished with an electrostatically applied polyester-epoxy powder coat (minimum 80-micron DFT), or optional Grade 304/316 stainless steel for corrosive chemical environments.
Impeller Assembly: Backward-curved 3D blades welded or riveted to precision-machined hubs, constructed from Al-Mg aluminum alloy or galvanized sheet steel, minimizing rotational inertia.
Bearings: Sealed deep-groove ball bearings (SKF or NSK specified) rated for L10 operating life exceeding 40,000 hours under continuous maximum load.

Applications

01/

Commercial HVAC Ducts: Primary supply and return air movement in multi-floor office buildings, hospitals, and educational facilities requiring quiet, concealed ceiling installation.

02/

Data Center Thermal Management: Hot-aisle heat extraction and auxiliary cooling modules where high static pressure is needed to pull air through dense server rack perforated tiles and containment barriers.

03/

Industrial Process Ventilation: Spot extraction of welding fumes, machine tool oil mist, and heat buildup in enclosed manufacturing cells.

04/

Agricultural & Greenhouse Facilities: High-humidity forced-air circulation systems requiring corrosion-resistant housing and sealed motor protection.

Available Options

Motor Configurations

Standard AC dual-speed motors, explosion-proof motors (ATEX/IECEx certified for Zone 1 and Zone 2 hazardous areas), and energy-saving EC motors.

Coating Systems

Marine-grade epoxy coatings, high-temperature heat-resistant paint (up to 150°C), and acid-alkali resistant internal linings.

Accessories

Inlet/outlet matching flanges, flexible duct connectors, protective wire safety guards, gravity discharge shutters, and acoustical silencer pods.

Sensor Integration

Factory-installed airflow pressure taps, thermal overload sensors (PTC/Klixon), and vibration monitoring studs.

Manufacturing & Quality

Production is executed across automated sheet metal fabrication lines utilizing Trumpf CNC laser cutting units, ABB robotic welding cells, and CNC spinning lathes to maintain strict dimensional tolerance (±0.2 mm) on all impeller casings.
Every rotor-impeller assembly undergoes dynamic multi-plane balancing on Schenck balancing rigs to reduce mechanical vibration below 0.8 mm/s RMS. Finished fan units are tested on a computerized AMCA 210-compliant air chamber to verify airflow-pressure performance curves, electrical draw, and noise output prior to crating. Quality assurance systems operate under ISO 9001 certified protocols, with electrical safety tests (dielectric strength and earth continuity) performed on 100% of outgoing units.

FAQ

Q: How do mixed flow fans compare in noise output to standard axial or centrifugal fans?

A: Mixed flow fans generally produce lower noise levels than centrifugal blowers of equivalent pressure because their aerodynamic blade discharge profile minimizes air turbulence against the housing scroll. Compared to tube-axial fans operating under high system resistance, mixed flow fans run at lower blade tip speeds for the same pressure output, resulting in a quieter acoustic profile.

Q: Can these fans be installed in vertical positions, or are they restricted to horizontal duct layouts?

A: They can be installed in horizontal, vertical, or inclined orientations without degrading bearing life or aerodynamic efficiency. The sealed heavy-duty ball bearings support radial and axial loads equally in any mounting axis.

Q: What is the standard lead time for OEM bulk orders and custom voltage requirements?

A: Standard catalog configurations ship within 15 to 20 business days. Custom voltage specifications (e.g., non-standard 3-phase frequencies), special corrosion-resistant coatings, or OEM private-label builds typically require 25 to 35 business days from drawing approval.

Q: Are performance curves available for third-party engineering software integration?

A: Yes. Full aerodynamic performance data, including airflow-pressure curves, power consumption watts, and sound power levels across octave bands, are provided in digital formats (CAD, PDF datasheets, and selection software parameters) for MEP engineers and system integrators.

Q: What motor protection mechanisms are built into the standard units?

A: Standard AC motors include internal thermal overload protection (automatic reset thermal switches for smaller frames, and external PTC thermistor leads for larger 3-phase frames). EC motor variants feature built-in locked-rotor protection, phase-failure detection, and over-voltage/under-voltage cutoffs.

Q: What minimum order quantity (MOQ) applies for custom flange sizes or painted housing colors?

A: Standard RAL color finishes and standard duct connection flanges carry no MOQ restrictions for project orders. Custom structural modifications, unique flange drilling patterns, or specialized stainless steel grades are subject to project-based minimum order evaluations (typically starting at 10 units).

Request a Quote

To secure technical data sheets, request performance curve matching for specific duct networks, or discuss OEM volume pricing, submit your project parameters below:
Required Airflow (CFM or m3/h):
Target Static Pressure (Pa or in.wg):
Duct Diameter / Size Constraints:
Power Supply Availability:
Estimated Annual Quantity / Project Scale:

With abundant experience, we are one of the most reliable mixed flow fans manufacturers and suppliers in China. Please feel free to wholesale high quality mixed flow fans made in China here from our factory. We also accept customized orders.

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