The mixed-flow ventilation fan is an inline duct fan for supply and exhaust applications in commercial and industrial HVAC systems. It combines axial airflow with centrifugal pressure generation, allowing direct installation in existing ductwork without 90-degree transitions or enlarged mechanical plenums.
Technical Specifications
|
Parameter |
Standard Metric Specs |
Imperial Equivalents |
|
Airflow Capacity Range |
350 - 12,000 m3/h |
205 - 7,060 CFM |
|
Max. Static Pressure |
Up to 1,250 Pa |
Up to 5.0 in.wg |
|
Impeller Diameter |
200 mm - 800 mm |
7.8 in. - 31.5 in. |
|
Sound Pressure Level |
38 - 72 dB(A) @ 3m |
38 - 72 dB(A) @ 9.8ft |
|
Operating Temperature |
-20°C to +60°C |
-4°F to +140°F |
|
Motor Protection / Insulation |
IP54 / IP55 rated, Class F insulation |
NEMA 3 / 4 equivalent |
|
Power Supply |
220V-240V/1Ph/50/60Hz, 380V-480V/3Ph/50/60Hz |
Same |
Ventilation Applications
Long Duct Ventilation: Suitable for ventilation systems where system resistance, particulate filters, or extensive duct branches require higher static pressure capability than typical axial fan configurations.
Supply and Exhaust Air Systems: Functions as a supply fan, exhaust fan, or inline booster unit in balanced mechanical HVAC systems.
Commercial & Industrial Space Ventilation: Supports workshop air exchange, warehouse ventilation, equipment room cooling, and agricultural greenhouse air circulation.
Fan Construction & Materials
Housing Fabrication: Heavy-gauge galvanized steel provides mechanical protection and resistance to atmospheric moisture.
Impeller Assembly: Aluminum alloy or reinforced polymer construction delivers the required aerodynamic profile while reducing rotating mass.
Motor Protection & Insulation: Enclosed motors feature Class F insulation and IP54 or IP55 protection, depending on configuration, safeguarding stator windings from dust and moisture splashes.
Dimensions & Duct Connection
Circular Duct Integration: Spigot and flanged connections align with standard circular spiral duct sizes across the range.
Straight Duct Clearance: Where required, provide adequate upstream straight-duct length for uniform inlet airflow. Refer to model-specific instructions for recommended clearance.
Engineering Drawings: 2D dimensional PDFs and 3D CAD files (STEP/DWG) are available on request for architectural layout confirmation.
Installation & Maintenance Access
Installation Orientation: Follow model-specific instructions. Horizontal and vertical mounting are available where specified.
Duct Coupling: Connects to rigid ducts via companion flanges or flexible ducts using quick-release clamps and flexible connectors.
Service Panel Access: Select models feature removable motor-impeller assemblies, enabling internal cleaning or motor inspection without disconnecting ductwork.
Recommended Inspection Routine: Periodically check impeller buildup, terminal-block wire security, and mounting isolation pads.
Quality Control
Dynamic Balancing Verification: Every impeller is dynamically balanced before assembly to the model-specified grade.
Electrical Safety Testing: All assembled motor-housing units undergo dielectric-strength (hipot) and ground-continuity testing.
Dimensional Inspection: Connection dimensions, flange-hole alignment, and casing roundness are checked against approved drawings.
Factory Running Test: Pre-shipment testing verifies rotation direction, current draw, and smooth mechanical operation.
Inspection Documentation: Factory test records and balancing reports are maintained by batch and available on request.
Packaging & Lead Time
Minimum Order Quantity: 1 unit for sample evaluation and model verification; production quantities are confirmed per project requirements.
Lead Times: Based on order confirmation and approved technical specifications. Samples typically require 7–10 working days; standard orders require 15–25 working days, depending on quantity and motor specifications.
Export Packaging: Units are film-wrapped and packed in heavy-duty cartons or ISPM-15-compliant heat-treated wooden crates for sea or air freight.
Container Loading: Palletized packing optimizes space in 20GP, 40GP, and 40HQ containers.
FAQ
Q: What warranty period is provided?
A: We offer a 12-month warranty from the bill-of-lading date covering motor and bearing manufacturing defects. Damage caused by incorrect duct static pressure or voltage is excluded.
Q: What payment terms are available for export orders?
A: Sample orders require 100% payment in advance. Production orders require a 30% T/T deposit, with the balance due before shipment, or L/C at sight above USD 10,000. Quotations are valid for 30 days.
Q: What airflow and static-pressure range is available?
A: The range covers approximately 800–12,000 m³/h, with static pressure up to 900 Pa. Each model's operating point is confirmed against your duct-resistance calculation before ordering.
Q: What noise level can be expected indoors?
A: Sound pressure typically ranges from 55 to 72 dB(A) at 1 meter, depending on model and static pressure. Low-noise motor options are available for offices and occupied areas.
Q: Is the fan suitable for CE-marked European HVAC systems?
A: Yes. CE certification under the EU Machinery and EMC Directives is available as an option, typically adding 7–10 working days to the lead time.
Q: Can a sample unit be provided for testing?
A: Yes. One sample can be ordered for airflow and noise verification, with a 7–10 working day lead time. Its cost may be credited toward a confirmed bulk order.
Q: What if the delivered unit differs from the approved drawing?
A: If factory errors affect flange dimensions or mounting footprint, we will remake or rework the affected components at our cost during the warranty period.
Hot Tags: mixed flow ventilation fan, China mixed flow ventilation fan manufacturers, suppliers, factory, Heavy Duty Mixed Flow Fan, High Pressure Mixed Flow Fan, Industrial Mixed Flow Fan, Mixed Flow Exhaust Fan, mixed flow fans, Mixed Flow Ventilation Fan
