QIYUE FAN · INDUSTRIAL FAN SELECTION SUPPORT
You Do Not Need to Know the Fan Model
Send the operating information you already have - complete or incomplete. QIYUE FAN reviews the duty point, system condition, suitable fan family, performance curve, fan size, speed, motor, material and mechanical configuration before quotation.
Airflow and pressure are ideal starting points, but they are not mandatory for the first inquiry. Existing drawings, nameplates, duct information, site photos or application details can also be used to begin the review.
Start With What You Know
Minimum Useful Selection Evidence
01
Airflow or process capacity
02
Pressure, or duct / equipment resistance information
03
Medium, temperature and dust / corrosion condition
04
Voltage, frequency and installation constraints
05
Existing fan nameplate, photos or drawing when replacing
Unknown items can remain blank during the first inquiry.
YOU PROVIDE
Available Project Information
Airflow, pressure, application, medium, temperature, drawings, photos or existing fan data.
QIYUE REVIEWS
Engineering Selection
Duty point, fan type, series, size, RPM, motor, material and installation configuration.
YOU RECEIVE
Selection + Quotation
Recommended model, technical data, motor configuration, drawing and commercial quotation as applicable.
Selection Route
01 · CHOOSE YOUR SELECTION PATH
Known Duty Point or Pressure Unknown?
Start from the information already available. If airflow and pressure are known, move directly into fan-family and performance-curve selection. If airflow is known but pressure is not, review the duct and equipment resistance first instead of guessing a fan model.
PATH A · KNOWN DUTY POINT
Airflow + Pressure Are Available
Use the known duty point together with medium, temperature, electrical and installation conditions to match the fan family, performance curve, size, speed and motor.
Airflow + Pressure → Temperature / Medium → Fan Family → Performance Curve → Size / RPM / Motor → RFQ
Continue With Known Duty Data →PATH B · PRESSURE UNKNOWN
Airflow Is Known, System Pressure Is Not
Start from the air path. Duct length, diameter, elbows, branches, filters, cyclones, scrubbers and other equipment are used to build the resistance review before selecting the fan.
Airflow → Duct / Equipment Data → Resistance Review → Pressure Basis → Fan Family / Model → RFQ
Start Pressure-Unknown Review →SEPARATE PATH · EXISTING FAN REPLACEMENT
No reliable duty point? Start from the old fan evidence.
Nameplate, motor data, photos, GA drawing, inlet / outlet dimensions and the current operating problem can be used to begin the replacement review.
Do not guess a fan model when the pressure basis is incomplete. Unknown items can remain blank during the first inquiry; QIYUE will identify the missing engineering inputs.
02 · ENGINEERING INPUTS
What QIYUE Checks Before Selecting the Fan
Fan type, model and motor are outputs of the engineering review. Buyers do not need to determine these values before sending the inquiry.
01
Application
What the fan must do and where it operates in the system.
02
Airflow
Required m³/h, m³/s or CFM at the design condition.
03
Pressure & Resistance
Static or total pressure and resistance from the complete air path. If system pressure is unknown, start from the available duct, equipment and resistance information.
04
Medium
Clean air, dust, hot gas, humid gas, corrosive or hazardous medium.
05
Temperature
Normal and maximum temperature and relevant gas-density conditions.
06
Material
Carbon steel, stainless steel, FRP, thermoplastic or special alloy when required.
07
Electrical
Voltage, frequency, motor protection, fan speed and variable-frequency requirements.
08
Installation
Inlet, outlet, rotation, drive, foundation, available space and duct interface.
Pressure known: provide the pressure basis (static or total) and operating condition. Pressure unknown: provide the air path and equipment resistance information instead.
03 · HOW SELECTION WORKS
From Project Data to a Confirmed Fan Direction
The customer provides the operating requirement. QIYUE converts that information into a technical fan selection before commercial quotation.
01
Review Duty
Application, airflow, pressure and system condition.
02
Determine Fan Family
Review centrifugal, axial or special-duty directions.
03
Match Fan Curve
Confirm a suitable airflow-pressure operating point.
04
Confirm Size & RPM
Fan size, rotational speed and practical operating range.
05
Select Motor
Power, voltage, frequency and required motor margin.
06
Review Construction
Material, drive arrangement, sealing and special requirements.
07
Confirm Installation
Rotation, outlet direction, interfaces and installation space.
08
Issue Proposal
Selected model, technical information and quotation.
04 · SPECIAL OPERATING CONDITIONS
Tell Us the Working Condition - We Review the Construction
Special-duty requirements affect material, motor, sealing, bearing arrangement, speed and fan construction.
Thermal Duty
High Temperature
Send normal and maximum gas temperature, operating duration and medium condition.
Material Review
Corrosive Gas
Send gas composition, concentration, moisture and temperature for material review.
Solids Condition
Dust & Particles
Describe dust loading, particle condition and whether the fan is before or after separation.
Hazardous Duty
Explosion Hazard
Provide hazardous-area requirements, gas or dust information and required motor standard.
Power Supply
50Hz / 60Hz
Frequency changes motor speed and can affect fan performance and motor selection.
Control
Variable-Frequency Operation
Provide the required control range and operating points.
Duty Cycle
Continuous Operation
State operating hours, duty cycle and relevant reliability requirements.
Installation
Limited Installation Space
Send the existing footprint, duct interfaces and available equipment envelope.
05 · EXISTING FAN REPLACEMENT
Start With the Evidence You Still Have
Old projects often have incomplete records. A replacement inquiry can still begin from the existing fan.
Fan nameplate
Motor nameplate
Full fan photographs
Inlet and outlet dimensions
Foundation / base dimensions
Existing drawing, datasheet or performance curve
Replacement Path
Choose the Evidence Available
I Have a Nameplate
I Only Have Photos
I Have an Old GA Drawing
Send Existing Fan Information →06 · ENGINEERING GUIDES
Technical References Used During Fan Selection
These guides explain individual engineering inputs used during fan selection. You do not need to calculate everything yourself before sending a selection request.
Airflow + Pressure
Operating Point Basics
Understand why airflow and pressure must be reviewed together.
Performance Curve
Read the Fan Curve
Check airflow, pressure and operating point on the fan curve.
Motor Power
Fan Power Calculation
Review required fan and motor power after establishing the operating point.
Drive Arrangement
Fan Drive Arrangement
Compare direct, belt and coupling arrangements.
Installation
Rotation & Outlet Angle
Confirm CW / CCW rotation and discharge direction.
Incomplete Data
Static Pressure Unknown
Start from duct, equipment and system information.
Replacement
Existing Fan Nameplate
Use existing fan and motor nameplate data as replacement evidence.
After Engineering Review
What the Selection Review Can Confirm
Fan Series
Fan Size
Operating Point
RPM
Motor
Construction
GA Drawing
Quotation
07 · SEND YOUR SELECTION REQUEST
Send What You Know. Leave Unknown Items Blank.
Complete parameters are useful, but they are not required to start the inquiry. For Path A, send the known airflow and pressure. For Path B, mark pressure as Unknown and send the duct, filter, cyclone, scrubber or other resistance information currently available.
Project Data
Application / process
Airflow: ______ m³/h
Pressure: ______ Pa / Unknown
Temperature: ______ °C
Medium: ______
Dust / corrosion condition: ______
Airflow: ______ m³/h
Pressure: ______ Pa / Unknown
Temperature: ______ °C
Medium: ______
Dust / corrosion condition: ______
Installation & Electrical
Voltage / frequency: ______
Duct size / layout: ______
Rotation / outlet: ______ / Unknown
Quantity: ______ sets
Destination: ______
Existing photos / drawing: Available / No
Duct size / layout: ______
Rotation / outlet: ______ / Unknown
Quantity: ______ sets
Destination: ______
Existing photos / drawing: Available / No