Compare centrifugal fan directions for furnace exhaust, kiln ventilation, boiler flue gas and thermal-process hot-gas handling. Final configuration is reviewed from continuous temperature, peak temperature, airflow, pressure, gas composition, dust condition and installation arrangement.
Temperature Is Only the Starting Point
A high-temperature fan cannot be selected from a temperature figure alone. The same inlet temperature may require different materials, shaft arrangements, bearing protection and cooling measures depending on gas composition, dust, moisture, operating duration and the complete resistance route.
Continuous Temperature
State the normal gas temperature at the fan inlet during sustained operation.
Peak Temperature
Confirm the highest short-term temperature and the expected duration and frequency.
Gas and Dust Condition
Review oxygen, moisture, corrosive components, dust concentration and particle hardness.
Structure and Layout
Confirm drive type, motor position, cooling, insulation, rotation, outlet and foundation.
High-Temperature Fan Product Directions
These series provide preliminary product directions for boiler, furnace, kiln and hot-gas projects. Their final temperature capability must be confirmed from material, cooling and operating-condition review.
Y5-47 Boiler ID Fan
For boiler flue gas, thermal-process exhaust and regular hot-gas induced-draft duties.
Reference direction: standard temperature duty may extend to 250°C after inlet-condition confirmation.
Y8-39 / Y9-38 ID Fan
For boiler, furnace and kiln exhaust routes with longer ducting or higher system resistance.
Reference direction: temperature-oriented configuration up to 250°C under confirmed conditions.
G/Y4-73 Boiler Fan
A wider boiler fan direction for medium and large systems requiring greater airflow capacity.
Configuration note: hot-gas use requires induced-draft role, material and temperature review.
GY6-51 Boiler Draft Fan
For large boiler and fluidized-bed draft systems requiring a broad airflow and pressure envelope.
Reference range: 11,000–667,000 m³/h · 1,859–10,980 Pa.
Continuous Temperature vs Peak Temperature
These two temperatures affect the fan differently. Both values, duration and occurrence frequency should be included in the RFQ.
Continuous Temperature
The sustained inlet temperature determines the long-term thermal load on the impeller, shaft, casing, bearings, seals and nearby motor components.
Confirm the normal value, operating hours per day, annual duty and whether temperature varies with production load.
Peak Temperature
The maximum short-term temperature may influence material safety margin, cooling demand, thermal expansion and emergency operating limits.
State how long each peak lasts, how often it occurs and whether the fan continues running during the event.
High-Temperature Fan Structure
The required configuration depends on the verified temperature duty and the actual process medium.
Impeller and Casing Material
Material selection should consider temperature, oxidation, corrosion, dust erosion, welding and expected service life-not temperature alone.
Bearing Isolation and Cooling
Bearing position, thermal isolation, cooling disc, air cooling or another supported method may be reviewed according to shaft temperature.
Motor Position and Drive
The motor should remain outside the hot-gas path. Drive arrangement is selected according to temperature, speed, size and maintenance access.
Thermal Expansion
Casing, shaft and duct connections require enough allowance for thermal expansion, especially during repeated heating and cooling cycles.
Insulation and Surface Protection
External insulation, coating and personnel-protection requirements should be coordinated with the site installation and maintenance plan.
Dust, Moisture and Corrosion
Hot gas may also contain ash, condensable vapour or corrosive components. These conditions affect material and wear protection.
Standard Industrial Fan vs High-Temperature Fan
| Review Item | Standard Industrial Fan | High-Temperature Fan |
|---|---|---|
| Main Selection Basis | Airflow, pressure and normal air condition | Airflow, pressure, continuous and peak temperature |
| Material Review | Standard carbon-steel direction where suitable | Material checked against heat, oxidation and gas composition |
| Bearing Protection | Normal bearing arrangement | Thermal isolation and cooling review where required |
| Expansion Review | Normal installation allowance | Thermal expansion and cycling considered |
| Process Medium | Clean or regular industrial air | Hot air, flue gas, process gas, dust or moisture |
Typical High-Temperature Fan Applications
Industrial Furnaces
Hot-gas extraction from heating, melting, heat-treatment and thermal-process furnaces.
Kilns and Dryers
Exhaust and circulation routes for kiln, drying-line and thermal-treatment processes.
Boiler Flue Gas
Boiler induced draft and hot flue-gas transport after heat-recovery or gas-treatment sections.
Thermal Process Exhaust
Custom hot-air and process-gas exhaust for industrial production and heat-recovery systems.
Define the Thermal Duty Before Selecting the Fan
For a new project, provide the operating temperature range and process-medium data together with the required airflow and pressure.
● Continuous and peak inlet temperature
● Peak duration and occurrence frequency
● Airflow and total pressure
● Gas composition, moisture and dust
● Operating hours and start-stop frequency
● Material, cooling, motor and power requirements
Match the Interface and Correct the Existing Failure Mode
For replacement work, send operating history and the real thermal or mechanical problem-not only the original model number.
● Fan and motor nameplate photos
● Current airflow, pressure, speed and power
● Normal and abnormal temperature records
● Inlet, outlet and foundation dimensions
● Problem: deformation, crack, wear, bearing heat or vibration
● Site photos, drawings and available installation space
High-Temperature Industrial Fan Questions
What temperature should be provided for fan selection?
Provide both the continuous inlet temperature and the highest short-term temperature, together with peak duration, frequency and whether the fan continues operating during the peak.
Can a standard boiler fan be used for high-temperature gas?
Only after the actual temperature, material, bearing, shaft, cooling and operating conditions are reviewed. A standard model name does not by itself confirm high-temperature suitability.
Does higher temperature always require stainless steel?
No. Material selection depends on temperature, oxidation, corrosion, dust erosion, welding, cost and expected service life. The process medium must be reviewed first.
Why are bearing isolation and cooling important?
Heat transferred through the shaft can increase bearing and lubricant temperature. The required isolation or cooling measure depends on the verified shaft-side thermal load.
What information is required for a high-temperature fan quotation?
Send airflow, total pressure, continuous and peak temperature, gas composition, dust, moisture, operating hours, installation arrangement, motor standard, quantity and project destination.
Related Industrial Fan Pages
Continue from the high-temperature product family to the furnace exhaust system, boiler induced-draft family, boiler forced-draft family or complete boiler fan selection guide.
Furnace High-Temperature Exhaust
Review process temperature, gas composition, cooling, dust treatment and complete system resistance.
View High-Temp System →Boiler Induced Draft Fans
Compare flue-gas extraction, negative-pressure and dust-removal boiler fan directions.
View ID Fans →Boiler Forced Draft Fans
Compare combustion-air supply, burner pressure and clean-air-side boiler fan directions.
View FD Fans →Boiler Fan Selection Guide
Compare induced-draft, forced-draft and high-temperature duties from the complete boiler route.
Read Selection Guide →Send Your High-Temperature Fan Duty
Provide airflow, total pressure, continuous and peak inlet temperature, peak duration, gas composition, dust and moisture condition, operating hours, installation layout, motor standard, quantity and destination. For replacement projects, attach the existing nameplate and interface drawing.
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