General-Purpose Centrifugal Fans
QIYUE FAN · GENERAL INDUSTRIAL VENTILATION
General-Purpose Centrifugal Fans
4-68, 4-72 and 4-79 centrifugal fan series for factory ventilation, industrial air supply, workshop exhaust and ordinary non-corrosive air-handling systems. Start with the required airflow, pressure and working condition, then select the suitable fan series and configuration.
PRODUCT FAMILY SCOPE
For Ordinary Industrial Air Supply & Exhaust
This family covers general-purpose centrifugal fans used where the conveyed medium is ordinary air or non-corrosive gas and the duty does not require a dedicated high-pressure, high-temperature, corrosion-resistant, explosion-proof or heavy-dust construction.
Do not select by model number alone.
Confirm airflow, pressure, temperature, medium condition, duct resistance, installation direction and motor requirements before final model selection.
01 · PRODUCT RANGE
Compare the 4-68, 4-72 and 4-79 Series
These three series share a general industrial ventilation role, but their available model ranges, drive arrangements and project positioning are different. Use the individual product page for detailed performance data.
WIDE RANGE · MULTIPLE DRIVE ARRANGEMENTS
4-68 Centrifugal Ventilation Fan
General industrial centrifugal fan for factory air supply, workshop exhaust, warehouse ventilation and large indoor airflow systems. The series provides a broad size range and multiple drive arrangements for different installation layouts.
REFERENCE MODEL RANGE 2.8A–20B
DRIVE OPTIONS A / C / D / B
TYPICAL ROLE Medium to Large Airflow
GENERAL VENTILATION · FLEXIBLE CONFIGURATION
4-72 Centrifugal Ventilation Fan
General-purpose centrifugal fan for factory ventilation, workshop exhaust, equipment-room air supply and ordinary ducted air-handling systems. A-, C- and D-type arrangements provide different installation and transmission options.
REFERENCE MODEL RANGE 2.8A–12C
DRIVE OPTIONS A / C / D
TYPICAL ROLE General Industrial Ventilation
INDOOR AIR EXCHANGE · SUPPLY & EXHAUST
4-79 Centrifugal Ventilation Fan
Centrifugal ventilation fan for factories, workshops, warehouses, machinery rooms and large indoor spaces. Intended for ordinary non-corrosive gas conditions where air supply, exhaust or general air exchange is required.
REFERENCE AIRFLOW 990–20,850 m³/h
REFERENCE PRESSURE 176–3,334 Pa
GAS TEMPERATURE ≤ 80°C
02 · PRELIMINARY COMPARISON
Start From the Duty, Then Open the Detailed Series Page
This comparison is for product-family orientation only. Final selection must be made from the actual fan performance data and project operating point.
| Series | General Positioning | Configuration Direction | Typical Project Use |
|---|---|---|---|
| 4-68 | Broad general ventilation range | Multiple A / C / D / B drive arrangements | Factories, workshops, warehouses and larger ventilation duties |
| 4-72 | General-purpose industrial ventilation | A / C / D arrangements | Workshop ventilation, equipment exhaust and ordinary ducted air supply |
| 4-79 | Ordinary indoor air supply and exhaust | Selected by airflow, pressure and installation requirement | Factories, warehouses, machinery rooms and large indoor spaces |
03 · FAN SELECTION
Information Required Before Selecting the Series
A model number is not enough to confirm the fan. Send the actual operating point and site conditions so the fan size, speed, motor and arrangement can be reviewed together.
01. Airflow: required air volume in m³/h or CFM
02. Pressure: static pressure, total pressure or known system resistance
03. Medium: clean air, gas composition, dust content and humidity
04. Temperature: normal operating and maximum gas temperature
05. Installation: duct route, rotation, outlet angle and available space
06. Electrical: voltage, frequency, phase and motor requirement
EXISTING FAN REPLACEMENT
Missing Airflow or Pressure Data?
Replacement projects often begin with incomplete operating data. If the original duty point is unavailable, send the information that remains on site and use it as the starting point for technical review.
Existing fan nameplate
Old fan model and motor information
Overall dimensions and inlet / outlet size
Rotation direction and discharge angle
Site photos and duct connection photos
Existing drawing or previous performance data, if available
04 · OPERATING BOUNDARY
When to Leave the General-Purpose Fan Range
General-purpose fans are intended for ordinary ventilation duty. Special working conditions should be reviewed through the corresponding fan family instead of changing only the motor or material.
Ordinary clean air
Factory ventilation, workshop exhaust, air supply and ordinary air exchange.
General-Purpose Fans
Higher system resistance
Long ducts, process resistance or pressure-first operating points.
High-Pressure Family
Hot gas / flue gas
Elevated gas temperature, boiler draft, furnace or kiln exhaust.
Corrosive gas
Acid mist, humid chemical exhaust or material-compatibility requirement.
Flammable atmosphere
Hazardous gas or explosion-risk area requiring project-specific review.
Dust-loaded air
Collector resistance, particle loading or abrasive dust conditions.
05 · APPLICATION PATHS
Common General Ventilation Projects
Use application pages when the required fan model is not yet known. The system layout and operating point should be defined before the final product series is confirmed.
Workshop Ventilation
General factory air exchange, equipment heat removal, air supply and ordinary exhaust systems.
Review Application → Industrial Drying Air
Review airflow, temperature and total system resistance before selecting a general ventilation fan.
Review Application → All Centrifugal Fans
Return to the parent product group to compare general, high-pressure, large-volume and other centrifugal fan directions.
View Centrifugal Fan Range → 06 · RFQ
Send the Operating Point Before Choosing the Model
QIYUE FAN can review whether 4-68, 4-72 or 4-79 is the appropriate starting direction after the airflow, pressure, medium and installation conditions are confirmed.
RECOMMENDED RFQ DATA
Airflow · Static / Total Pressure · Gas Temperature · Medium & Dust Condition · Voltage / Frequency · Rotation & Outlet Direction · Quantity & Destination
With abundant experience, we are one of the most reliable general-purpose centrifugal fans manufacturers and suppliers in China. Please feel free to wholesale high quality general-purpose centrifugal fans made in China here from our factory. We also accept customized orders.
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