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 diagonally, compounding kinetic energy and static pressure.
Engineered for medium-to-high pressure duct networks, this fan handles complex ventilation paths with long duct runs, multiple elbows, and filtration components. Target sectors include commercial real estate, industrial workshops, and HVAC system integration.

Key Features

Diagonal Impeller Aerodynamics: Combines high volumetric flow rates typical of axial fans with the static pressure capability of centrifugal housings, reducing total system footprint.

Inline Duct Configuration: Straight-through airflow design allows direct insertion into circular or rectangular ductwork, eliminating costly transition bends.

Removable Motor-Impeller Assembly: The central core unit detaches from duct flanges without dislodging the ducting network, enabling rapid field maintenance.

Balanced Rotating Components: Impellers are dynamically balanced to ISO 1940 Grade G2.5 standards to suppress mechanical vibration and bearing wear.

Corrosion-Resistant Casing: Heavy-gauge galvanized steel or aluminum housings treated with electrostatically applied polyester powder coating (min. 80 um thickness).

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

Construction & Working Principle

Aerodynamic Working Principle
Air is drawn into the impeller inlet axially. As it passes through the conical blade geometry, centrifugal forces accelerate the air outward at an angle, converting rotational energy into static pressure. This dual-action mechanism prevents stall conditions common in traditional axial fans operating under high resistance.

Manufacturing & Quality Control Infrastructure
Units are fabricated in an ISO 9001-certified facility utilizing automated laser-cutting systems, CNC turret presses, and robotic MIG welding cells to guarantee dimensional tolerances within plus-minus 0.2 mm.
Sheet Metal Processing: Trumpf CNC laser cutters ensure precision flange alignment and zero-leakage casing seals.
Balancing Facility: Every completed impeller assembly undergoes computer-controlled vibration analysis on Schenck balancing rigs prior to final casing integration.
Electrical Testing: 100% of motors undergo dielectric strength tests (Hi-Pot test at 1,800V), load amperage checks, and phase-resistance measurement before assembly.

Applications

Commercial Kitchen Extraction: Removing grease-laden vapors through extended duct networks requiring sustained static pressure.

Data Center & Server Room Ventilation: Providing continuous localized spot cooling and maintaining positive pressure in raised-floor plenums.

Cleanroom Air Supply: Delivering laminar airflow through HEPA filter banks in pharmaceutical and electronics manufacturing plants.

Basement & Underground Parking Exhaust: Extracting carbon monoxide and stale air across multi-zone exhaust trunking.

Available Options

Motor Configuration: EC (Electronically Commutated) brushless DC motors for 0-10V speed modulation, or standard AC external rotor motors.
Acoustic Insulation: 50mm high-density mineral wool internal sound absorption lining to reduce decibel output by 6 to 12 dB(A).
Material Upgrades: 304 or 316 stainless steel housings for corrosive chemical environments or marine applications.
Control Accessories: Pre-wired speed controllers, differential pressure switches, inlet/outlet safety guards, and flexible duct connectors.

Engineering Resource Downloads

[Download 3D CAD Models (STEP / IGES)] - Instant access to complete mechanical assemblies for CAD/Revit layout integration.
[Download Full PDF Engineering Datasheet & Performance Curves] - Comprehensive fan selection charts and psychrometric data.

FAQ

Q: What is the maximum duct length this mixed flow fan can overcome?

A: Duct length capacity depends on duct diameter, roughness, and fitting losses. Models generating 800 Pa static pressure typically overcome equivalent duct lengths up to 60 meters with standard straight runs and standard elbows, provided the duct sizing matches the fan outlet velocity (recommended below 12 m/s).

Q: Can these fans be installed in a vertical orientation?

A: Yes. The deep-groove ball bearings utilized in our motor assemblies accept both horizontal and vertical shaft loading. When mounting vertically in outdoor settings, specify a weather cowl and drain plug configuration.

Q: How do EC motor options integrate into existing Building Management Systems (BMS)?

A: EC motors accept a standard 0-10V DC control signal or PWM input from external building automation controllers, allowing precise closed-loop airflow modulation based on CO2 or temperature sensor feedback.

Q: What third-party safety and performance certifications do these fans hold?

A: Production lines operate under ISO 9001 quality management systems. Individual fan models carry CE compliance documentation, UL/CSA recognized motor components, and AMCA-compliant airflow performance curves derived from laboratory testing per ISO 5801.

Q: What is the standard lead time for OEM custom voltage or housing requirements?

A: Standard catalog units ship within 10 to 15 business days. Custom voltage specifications (e.g., 575V/3Ph/60Hz) or 316 stainless steel builds require 25 to 30 business days following engineering drawing sign-off.

Q: What warranty terms apply to continuous industrial duty?

A: Units carry a 24-month replacement or repair warranty covering material and manufacturing defects from the date of bill of lading, applicable to equipment operated within rated electrical and thermal parameters.

Request a Quote

Submit project parameters to receive formal engineering datasheets, 3D CAD models (STEP/IGES), and volume pricing.

Required Parameters for Siting: Required CFM/CMS, total static pressure (Pa or in.wg), electrical supply (Voltage/Phase/Hz), duct diameter, and anticipated operating environment.
Direct Engineering Contact: Sales@qiyuefan.com | Request custom performance curves via our technical portal.

Hot Tags: mixed flow exhaust fan, China mixed flow exhaust fan manufacturers, suppliers, factory