Mixed-flow exhaust fans combine axial airflow with centrifugal pressure generation, providing balanced airflow and pressure for commercial and industrial ventilation. They support in-line duct exhaust, supply, and transfer applications where axial fans lack sufficient pressure and centrifugal fans require excessive installation space.
Technical Specifications
|
Parameter Category |
Standard Metric Specification |
Imperial Equivalent / Range |
|
Airflow Capacity |
500 - 15,000 m3/h |
300 - 8,800 CFM |
|
Static Pressure |
Up to 1,200 Pa |
Up to 4.8 in.wg |
|
Impeller Diameter |
200 mm - 800 mm |
7.8 in - 31.5 in |
|
Motor Input Power |
0.12 kW - 7.5 kW |
0.16 HP - 10 HP |
|
Electrical Supply |
220V/50-60Hz/1Ph or 380V-480V/50-60Hz/3Ph |
Dual frequency compatible |
|
Motor Protection |
IP54 / IP55 insulation Class F |
Thermal overload protection built-in |
|
Operating Temperature |
-20°C to +60°C |
-4°F to +140°F |
Motor & Drive Configuration
Global Electrical Compatibility: Configurable for standard 50 Hz and 60 Hz supplies across single-phase and three-phase regional voltages.
Low Maintenance Drive: Direct-drive construction eliminates belt wear, tensioning, and routine replacement costs.
VFD Ready: Fully compatible with Variable Frequency Drives for energy-saving speed control.
Impeller & Aerodynamic Design
Aerodynamic Profile: Diagonal curved blades combine axial airflow paths with radial pressure acceleration.
Inline Duct Layout: Straight-through cylindrical casing integrates directly into continuous duct runs without complex offsets.
Noise Control
Acoustic Testing: Sound levels are measured according to ISO 3744 standards (complete octave band data available upon request).
Low-Noise Options: Lower-RPM motor options and flexible duct expansion joints can be specified for sound-sensitive environments.
Customization & Project Requirements
RFQ Engineering Inputs: To receive an accurate quotation and selection model, please provide target airflow, total static pressure, gas medium composition, operating temperature, and local power supply.
Casing Options: Available in heavy-gauge carbon steel, galvanized steel, or stainless steel variants.
Protective Coating: Carbon steel models can receive electrostatically applied powder coating to improve resistance to humidity and surface corrosion.
Mechanical Adaptation: Custom flange bolt patterns, mounting foot locations, and matching companion flanges manufactured to project drawings.
OEM Branding: Private-label nameplates, custom tag numbers, and project-specific packaging available.
Quality Testing
Aerodynamic Testing: Airflow and static pressure performance verified per ISO 5801 / AMCA 210 wind tunnel test standards.
Impeller Dynamic Balancing: Balanced on precision balancing machines per ISO 1940-1 with balance reports available.
Vibration Testing: Fan vibration is checked using calibrated accelerometers according to applicable factory standards.
Electrical Safety Inspection: Insulation resistance and dielectric testing are conducted per IEC 60034-1 motor standards.
Packaging & Delivery
Export Packaging: Packed in IPPC ISPM 15-compliant fumigated plywood crates with internal moisture-proof wrapping.
Lead Time: Standard catalog units ship within 15 to 25 business days following final drawing sign-off.
Warranty Coverage: Supported by a 12-month factory warranty from the Bill of Lading date against manufacturing defects.
FAQ
Q: What is the MOQ for mixed-flow fans?
A: The MOQ is 1 unit for standard models (QY-MF-350/500/800). Custom flange or coating configurations require 2 units due to tooling costs.
Q: What payment terms do you accept?
A: We accept a 30% T/T deposit, with the balance due before shipment, or L/C at sight for orders above USD 15,000. Quotations remain valid for 30 days.
Q: What motor efficiency class is used?
A: Standard units use IE3 premium-efficiency motors.
Q: Can the fan handle corrosive, high-temperature, or dusty gases?
A: Standard carbon-steel units handle gas temperatures up to 80°C. For corrosive media or temperatures up to 150°C, we recommend a stainless-steel casing with a high-temperature motor, quoted separately.
Q: Is third-party inspection or a test report available?
A: Yes. SGS, BV, or TÜV inspection can be arranged at the buyer's cost. A factory aerodynamic/vibration test report referencing ISO 5801 and ISO 1940-1 is issued for every unit.
Q: Do you provide installation drawings or commissioning support?
A: General arrangement drawings are provided within 5 days of order confirmation. Remote commissioning via video call is included; on-site commissioning is available for an additional fee and travel costs.
Q: What are the actual noise levels?
A: Measured at 1 meter under free-field conditions, levels are approximately 62 dB(A) for QY-MF-350, 71 dB(A) for QY-MF-500, and 78 dB(A) for QY-MF-800.
Q: Can you match an existing duct-flange pattern?
A: Yes. Provide the existing flange drawing or dimensions, and our engineers will match the bolt pattern and mounting footprint at no additional design charge for standard casing materials.
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