High pressure centrifugal fans are designed for applications requiring controlled airflow and high system pressure. They are used for forced draft, process air supply, combustion air, dust collection, pneumatic conveying, and other industrial air-handling applications.
Fan Series & Application Guide
|
Fan Series |
Typical Duty |
Typical Applications |
Drive Options |
Material Options |
|
8-09 |
High-pressure air supply |
Furnace, heat exchanger |
A / D |
Carbon Steel / Heat-Resistant Alloy |
|
9-12 |
High-resistance air handling |
Ductwork, process chambers |
A / C / D |
Carbon Steel / Stainless Steel |
|
9-19 |
Forced-draft applications |
Boiler, dust collector |
A / D |
Carbon Steel |
|
9-26 |
High-pressure conveying |
Baghouse, pneumatic conveying |
C / D |
Heavy-Duty Carbon Steel |
|
10-16 |
High-pressure process air |
Air supply, process equipment |
A / D |
Carbon Steel / Alloy Steel |
Airflow & Fan Selection
|
Item |
Brief Description |
|
Required Duty Point |
Define the required airflow and system pressure at the fan operating point. |
|
System Resistance |
Calculate pressure losses from ducts, elbows, dampers, filters, heat exchangers, and other system components to determine the required fan pressure. |
|
Gas Density |
Adjust for temperature, altitude, humidity, and gas density. |
|
Speed |
Select fan speed to achieve the required duty point while remaining within the applicable operating range. |
|
Motor Power |
Provide sufficient power margin to prevent overload. |
|
Drive Type |
Choose direct, coupling, or belt drive based on operating conditions. |
Impeller Design
Blade Profiles: Backward-curved or inclined blades can be used for clean-air applications, while radial or radial-tip designs are available for dust-laden and abrasive gas streams where reduced material buildup and improved wear resistance are required.
Welded Construction: Steel plate impellers are fabricated and welded according to the specified structural and manufacturing requirements for the selected operating conditions.
Dynamic Balancing: Impellers are dynamically balanced to ISO 21940-11, with balance grades logged in test reports.
Shaft Mounting: Impellers are secured to the shaft using taper-lock bushings, keyed connections, or other specified shaft-locking methods according to the selected fan configuration.
Operating Conditions
Operating Conditions: Fan selection depends on airflow, system pressure, gas temperature, gas composition, dust loading, altitude, humidity, and other site conditions.
High-Temperature Configuration: Selected fan configurations are available for high-temperature applications up to 500°C, using extended shafts, cooling components, and other temperature-control measures according to the operating conditions.
Material Options
Carbon Steel: Q235 carbon steel is available for standard industrial air-handling applications. The allowable operating temperature depends on the fan configuration and selected components.
Stainless Steel & Coatings: 304 or 316L stainless-steel components and protective coatings can be specified for applicable corrosive or humid gas conditions. Material and coating selection depends on gas composition, temperature, and corrosion conditions.
Wear Protection: Tungsten-carbide hardfacing or replaceable wear liners can be specified for selected abrasive-dust applications. The appropriate wear protection depends on dust concentration, particle characteristics, gas velocity, and operating hours.
Fan Arrangement & Installation
Discharge Orientation: Fan discharge orientation can be configured according to the required duct layout. Available outlet angles depend on the selected fan arrangement.
Rotation: Fan rotation is specified as clockwise (CW) or counterclockwise (CCW) when viewed from the drive side.
Base Frame: Welded steel bases unify the housing, bearings, and motor onto a single foundation plane.
Vibration Control: Flexible duct connectors and rubber or spring isolators isolate dynamic loads from the site structure.
Engineering Deliverables: Includes 2D outline drawings, 3D STEP models, foundation loads, and maintenance clearance requirements.
Noise & Vibration
Vibration Testing: Fan assemblies can be tested at operating speed, with vibration velocity values recorded in the applicable factory inspection or FAT documentation.
Acoustic Data: Sound pressure data and octave-band information can be provided for applicable configurations when required by the project.
Silencer Options: Matching inlet/outlet silencers and acoustic enclosures are available for site noise compliance.
Quality Control
Performance Testing: Airflow, static/total pressure, shaft power, and motor current are verified against performance curves.
Mechanical Run Test: Fans are operated at the specified speed to check bearing temperature, vibration, and seal performance before shipment.
Weld QA: Structural welds undergo visual checks, plus NDT (MT/UT) per project specifications.
Machining Precision: Shaft and bearing-seat dimensions are inspected against the applicable engineering drawings and specified machining tolerances.
Pre-Shipment Sign-Off: Final checks confirm paint thickness (DFT), nameplates, rotation indicators, and seaworthy packaging.
FAQ
Q: Can you provide a representative model-to-spec example?
A: An HDF-800 configuration can be supplied for approximately 25,000 m³/h at 800 Pa with a 15 kW motor, subject to the selected operating point and fan configuration. Final performance should be confirmed against the applicable fan performance curve.
Q: Do different impeller sizes use the same duct flange?
A: Not necessarily. Flange dimensions and bolt-hole patterns depend on the fan size and selected configuration. The applicable flange dimensions and drawings are confirmed during the technical review.
Q: Is CE certification included by default?
A: CE documentation is available for applicable configurations where required by the destination market. The relevant Declaration of Conformity and technical documentation are provided according to the supplied configuration.
Q: When should different drive arrangements be selected?
A: Drive arrangement is selected according to motor power, required speed, maintenance access, installation space, and transmission requirements. The appropriate arrangement is confirmed during technical selection based on the project duty point and installation conditions.
Q: How is the correct model selected?
A: Engineers calculate the duty point using duct resistance, target airflow, and gas temperature, then match it to the nearest standard impeller diameter and motor-power combination.
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