The High Pressure Combustion Fan is a centrifugal forced-draft fan designed to supply combustion air where burners, heat exchangers, recuperators, filters, or long duct runs create high system resistance.
Key Specifications
|
Parameter |
Specification |
|
Airflow Rate |
500–15,000 m³/h (300–8,800 CFM) |
|
Static Pressure |
2,500–12,000 Pa (10–48 in. w.g.) |
|
Motor Power |
1.5–110 kW |
|
Airstream Temperature |
-20°C to 300°C |
|
Impeller Material |
Q345B Carbon Steel / 304 SS / 316L SS |
|
Drive Arrangement |
Arrangement 4 Direct Drive / Arrangement 9 Belt Drive |
|
Power Supply |
380 / 415 / 480 V, 50 / 60 Hz, 3-Phase |
Airflow & Pressure Performance
High Static Pressure: Radial-blade geometry accelerates air outward and converts velocity into static pressure through the scroll housing, allowing the fan to overcome resistance in combustion-air systems.
Stable Airflow: The impeller and scroll housing are aerodynamically matched to maintain a consistent pressure-airflow relationship across the operating range.
High Airflow Capacity: Optimized impeller and casing geometry supports high-volume air delivery while maintaining the required static pressure.
Low Vibration: The impeller is dynamically balanced to ISO 1940 Grade 2.5 to reduce rotor imbalance and associated vibration during operation.
Fan Construction
Rigid Welded Casing: The scroll housing is fabricated from formed steel plates with welded joints to maintain the required casing geometry.
Precision-Fit Components: CNC-cut housing and inlet components are assembled to controlled dimensions for consistent alignment between the inlet, impeller, and casing.
External Bearing Arrangement: Pillow-block bearings are positioned outside the main airstream, providing access for inspection, lubrication, and replacement.
Mechanical Drive Assembly: The shaft, impeller, and drive components are mechanically assembled as a matched rotating system for connection with the selected motor arrangement.
Compatibility
Burner Control Compatibility: VFDs and motorized inlet dampers can be integrated for variable combustion-air control, with 4–20 mA or 0–10 V signals for compatible control systems.
Ductwork Compatibility: Inlet and outlet dimensions, flange drilling, and discharge orientation can be configured to match existing ductwork.
Drive Compatibility: Direct-drive and belt-drive arrangements can be configured according to the required motor installation and equipment layout.
Installation Compatibility: Mounting positions, support structures, connection locations, and overall fan orientation can be adapted to existing equipment layouts.
High-Temperature Configuration: Shaft cooling and corresponding structural configurations can be specified for elevated-temperature service.
Applications
Industrial Gas & Oil Burners
Forced-draft air for gas, oil, and dual-fuel burners where burner heads, valves, and ductwork create airflow resistance.
Industrial Boilers
Combustion air for fire-tube and water-tube boilers, including systems with air preheaters, filters, and extended ducts.
Thermal Oxidizers & RTOs
Combustion air for thermal oxidizers and RTOs with pressure loss from burners, ceramic media, dampers, and ductwork.
Industrial Process Furnaces
Combustion-air supply for heat-treatment, annealing, forging, reheating, and continuous furnaces with single or multiple burner zones.
Industrial Ovens & Hot-Air Systems
Forced-draft air for direct-fired ovens, dryers, and hot-air generators requiring dedicated combustion-air supply.
OEM & Custom
|
Customization |
Examples |
|
Fan Speed |
Project-specific RPM |
|
Rotation Direction |
CW / CCW |
|
Outlet Angle |
0°, 45°, 90°... |
|
Casing & Structure |
Casing, base, support frame |
|
Connections |
Inlet/outlet size, flange drilling |
|
Temperature |
High-temperature shaft/bearing arrangement |
|
Corrosion |
Resistant material/coating |
Inspection Before Shipment
Impeller Balance
The assembled impeller is dynamically balanced on a balancing machine to identify rotor imbalance. The balance result is checked against the specified balance grade before final assembly.
Dimensional Review
Critical dimensions are measured with calibrated measuring tools against the approved drawing and production configuration. Inlet, outlet, mounting, and component dimensions are confirmed before shipment.
Assembly Inspection
Motor, bearings, shaft, impeller, transmission, and guards are visually and mechanically inspected after assembly. Fasteners, component positioning, and rotating-part clearance are checked for correct installation.
Final Confirmation
The nameplate, rotation direction, outlet direction, external condition, and ordered configuration are checked against the confirmed order. Any project-specific requirements are verified before dispatch.
Supply Information
|
Item |
Standard Information |
|
MOQ |
1 set |
|
Lead Time |
2–4 weeks standard; 4–7 weeks customized |
|
Payment |
T/T, 30% deposit; 70% before shipment |
|
Trade Terms |
EXW / FOB / CIF |
|
Packaging |
Export wooden case or reinforced packing |
|
Warranty |
12 months |
|
Spare Parts |
Impeller, shaft, bearings, belts and other replacement parts |
|
Shipping |
Sea / air / truck |
|
Documents |
Datasheet, drawing, performance curve, motor data, O&M manual |
FAQ
Q: What is the difference between static pressure and total pressure?
A: Static pressure represents the pressure available to overcome system resistance, while total pressure also includes the velocity pressure of the moving air.
Q: How does air temperature affect combustion fan selection?
A: Higher air temperature reduces air density, so the fan selection should use the actual operating temperature when calculating airflow, pressure, and motor requirements.
Q: Should I select a fan based on airflow or pressure first?
A: Both values are required. The fan should be selected at the intersection of the required airflow and system pressure on the fan performance curve.
Q: What information is needed to replace an existing combustion fan?
A: Provide the existing fan model or nameplate, airflow and pressure requirements, inlet and outlet dimensions, motor information, rotation direction, and installation dimensions.
Q: Can one combustion fan supply multiple burners?
A: Yes. A single fan can supply multiple burners when the air distribution system is designed with the required branch ducts, dampers, and control components.
Q: What causes combustion fan noise?
A: Common sources include aerodynamic turbulence, rotor imbalance, bearing condition, duct vibration, and airflow velocity. Proper fan selection and mechanical installation help control operating noise.
Q: How often should a combustion fan be maintained?
A: Inspect the impeller, bearings, shaft, drive components, guards, and duct connections regularly, with inspection intervals established according to operating hours and service conditions.
Q: Can a combustion fan run continuously?
A: Yes. The fan can be specified for continuous-duty industrial operation when the selected motor, bearings, drive system, and operating conditions are within their rated limits.
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