The 9-18 is a broad-range high-pressure centrifugal fan series for industrial forced draft, furnace combustion air, process-air systems, material conveying and other applications where substantial airflow must overcome significant system resistance.
The documented range extends from No.4A to No.25F, with A, D and F arrangements, approximately 797–157,654 m³/h airflow and published total pressure up to approximately 21.1 kPa.
Select the fan from the actual airflow, pressure, medium condition and installation requirement rather than from the model number alone.
High-Pressure Fan for Furnace Forced Draft and Industrial Process Air
The 9-18 series covers a much wider capacity range than a single-duty high-pressure blower. Documented sizes extend from No.4A to No.25F and use different fan speeds and mechanical configurations as airflow and power increase.
The original catalogue lists small and medium fertilizer production equipment, cupola furnaces, combustion furnaces, positive-pressure oil-fired furnaces, material conveying, grain conveying and industrial air delivery among its intended duties.
The medium should generally be non-corrosive, non-spontaneously combustible, non-explosive and free from sticky substances. Catalogue guidance states a medium temperature generally not exceeding 80°C and dust concentration not exceeding 150 mg/m³.
9-18 Series Technical Parameters
9-18 Fan Performance by Size and Speed
Each original catalogue block contains eight operating points. To keep the online table usable, the eight points for each fan size and speed are shown below as the exact published minimum-to-maximum envelope.
Across the eight catalogue points, internal efficiency follows the published sequence 69.5%, 73.8%, 75.9%, 76.3%, 75.9%, 74.8%, 72.0% and 67.6%.
A, D and F Configurations
No.4A–6.3A
Used for the smaller documented sizes. Separate A-type installation dimensions are provided below.
No.7.1D–16D
Mid-to-large range with separate shaft and bearing support. Detailed installation dimensions are provided below.
No.18F–25F
Large-capacity configurations. Final project dimensions should be confirmed from the selected F-type production drawing.
9-18 No.4A–6.3A Installation Dimensions
The small-size dimensional schedule is shared by the 10-18, 9-18 and corresponding 9-16 family sizes in the original catalogue. Values below are the 9-18 rows. Dimensions are in millimetres unless stated otherwise.
9-18 No.7.1D–16D Installation Dimensions
The D-type schedule below uses the 9-18 rows from the shared 10-18 / 9-18 / 9-16 installation table. Dimensions are in millimetres unless stated otherwise.
Furnace Forced Draft, Process Air and Material Conveying
Furnace Forced Draft
High-pressure combustion and process air for industrial furnaces. For system-level duty and resistance review, see the Industrial Forced Draft Fan System.
Cupola Furnace Air
Pressure-oriented air delivery for cupola-furnace systems.
Process Air
Industrial process-air duties with substantial system resistance.
Material Conveying
Air supply for reviewed material-conveying systems. For clean-air conveying design inputs and system-resistance review, see the Industrial Pneumatic Conveying Air System.
Grain Conveying
Catalogue-listed grain-conveying application subject to system review.
Fertilizer Production
Supporting equipment for small and medium fertilizer-production lines.
How to Select the 9-18 Fan
Airflow
Required m³/h or CFM.
Pressure
Static or total pressure.
Size & Speed
Match the duty point to the performance table.
Motor
Check required power and project margin.
Installation
Confirm outlet orientation and foundation dimensions.
If the required airflow or system pressure is not yet confirmed, start with the Industrial Fan Selection Guide before comparing individual high-pressure fan series.
Related High-Pressure Fan Series
9-16 High-Pressure Centrifugal Fan
View 9-16 →10-18 High-Pressure Centrifugal Fan
View 10-18 →10-08-31 High-Pressure Centrifugal Fan
View 10-08-31 →10-24 High-Pressure Centrifugal Fan
View 10-24 →6-30 High-Pressure Process Air Centrifugal Fan
View 6-30 Process Air Fan →High-Pressure Centrifugal Fans
Compare High-Pressure Fans →9-18 High-Pressure Fan FAQ
What airflow range does the 9-18 cover?
Published catalogue data cover approximately 797–157,654 m³/h.
What is the maximum published total pressure?
The highest published value in the supplied 9-18 performance tables is approximately 21,067 Pa.
What sizes are available?
The documented range covers No.4A through No.25F using A, D and F arrangements.
What medium temperature is allowed?
The original catalogue states that medium temperature generally should not exceed 80°C.
Can motors be supplied for overseas voltage and frequency?
Yes. Motor voltage and frequency can be matched to the destination-market requirement after the operating point is confirmed.
Are the 9-18 and 10-18 installation drawings shared?
For the size ranges identified in the original catalogue, yes. The performance tables remain series-specific and should not be interchanged.
Send Airflow + Pressure Before Choosing the Fan Size
Send airflow, pressure, medium temperature, gas or material condition, voltage, frequency, required outlet direction and quantity. QIYUE FAN can review the appropriate fan size, speed, configuration and motor.
Tel / WeChat / WhatsApp: +86 15653305981 | Email: sales@qiyuefan.com
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