The Industrial Boiler Centrifugal Fan is an industrial centrifugal fan series designed for boiler ventilation systems.
The G4-73 is primarily used as a Forced Draft Fan (FD Fan) for supplying combustion air to the boiler furnace, while the Y4-73 is primarily used as an Induced Draft Fan (ID Fan) for extracting flue gas and maintaining furnace negative pressure.
The series is suitable for industrial steam boilers, hot water boilers, biomass boilers, waste heat boilers, district heating systems and thermal energy facilities.
EMS provides customized configurations according to airflow, pressure, temperature, dust concentration, gas composition, system resistance and installation requirements.
Boiler Combustion Air Supply
Industrial Boiler Forced Draft
Steam Boiler Air Supply
Biomass Boiler Combustion
Heating Boiler Ventilation
Thermal Energy Systems
Boiler Flue Gas Exhaust
Industrial Boiler Induced Draft
Furnace Negative Pressure Control
Boiler Dust Collection
Flue Gas Treatment
FGD and DeNOx Systems
Industrial Heating Exhaust
| Parameter | Typical Range |
|---|---|
| Product Type | Boiler Centrifugal FD / ID Fan |
| Airflow | 3,000–300,000 m³/h |
| Total Pressure | 1,000–6,000 Pa |
| Motor Power | 5.5–800 kW |
| Fan Speed | 730–2,900 rpm |
| Air / Gas Temperature | Up to 250°C typical |
| Drive Type | Direct / Belt / Coupling |
| Fan Structure | Centrifugal Fan |
| Impeller Material | Carbon Steel / Wear-Resistant Steel |
| Casing Material | Carbon Steel / Customized |
| Bearing | Industrial Heavy-Duty Bearing |
| Installation | Horizontal / Customized |
| Frequency | 50 Hz / 60 Hz |
| Operation | Continuous Duty |
Engineering Note: These are typical reference ranges for engineering and website presentation. Actual fan performance should be selected according to the required airflow, pressure, temperature, gas density and total system resistance.
| Item | G4-73 | Y4-73 |
|---|---|---|
| Full Name | Boiler Forced Draft Fan | Boiler Induced Draft Fan |
| Function | Supplies combustion air | Extracts flue gas |
| Installation | Upstream of furnace | Downstream of boiler |
| Medium | Air | Flue Gas |
| Dust Level | Usually low | Usually higher |
| Temperature | Usually lower | Usually higher |
| Main Purpose | Combustion air supply | Negative pressure & exhaust |
| Related Equipment | Air Duct / Air Preheater | Dust Collector / FGD / DeNOx |
In simple terms:
G4-73 = Boiler FD Fan → Combustion Air Supply
Y4-73 = Boiler ID Fan → Flue Gas Extraction
Both are centrifugal boiler fans, but they operate at different positions and under different operating conditions within the boiler system.
Ambient Air → G4-73 FD Fan → Air Duct → Boiler Furnace → Combustion
The G4-73 supplies pressurized air to the furnace to provide the combustion air required for stable fuel combustion.
Boiler Furnace → Dust Collector → Flue Gas Treatment → Y4-73 ID Fan → Chimney
The Y4-73 extracts flue gas from the boiler system and overcomes the resistance of dust collectors, flue gas treatment equipment, ductwork and chimneys.
The G4-73 and Y4-73 configurations cover both major boiler ventilation functions: forced draft and induced draft.
The centrifugal impeller provides stable airflow and pressure for continuous industrial boiler operation.
The Y4-73 can be selected according to the pressure losses of dust collectors, FGD, DeNOx and other flue gas treatment equipment.
Wear-resistant impellers, liners and reinforced structures are available for dusty ID applications.
High-temperature bearings, cooling arrangements, high-temperature materials and special sealing solutions can be configured according to actual operating conditions.
Available drive configurations include:
Direct Drive
Belt Drive
Coupling Drive
Variable frequency drive systems can be configured for airflow and pressure adjustment according to boiler load.
Industrial Boiler Plants
Steam Boiler Plants
Hot Water Boiler Plants
Biomass Boiler Plants
Waste Heat Boiler Systems
District Heating Plants
CHP Plants
Thermal Energy Systems
Boiler Dust Collection Systems
Flue Gas Treatment Plants
Industrial Heating Systems
Recommended selection data:
Boiler Capacity
Fuel Type
Required Combustion Airflow
Required Pressure
Air Temperature
Air Density
Air Preheater Resistance
Duct Resistance
Motor Voltage / Frequency
Installation Conditions
Recommended selection data:
Boiler Capacity
Fuel Type
Required Flue Gas Flow
Required Pressure
Flue Gas Temperature
Gas Density
Dust Concentration
Flue Gas Composition
Dust Collector Resistance
FGD / DeNOx Resistance
Duct Size and Length
Installation Altitude
Motor Voltage / Frequency
Boiler capacity alone is not sufficient for selecting the fan size. The actual duty point should be determined from the combustion or flue gas volume and the resistance of the complete system.
EMS provides complete customized boiler fan solutions, including:
Fan Selection
Airflow & Pressure Calculation
Impeller Design
Material Selection
Wear-Resistant Configuration
High-Temperature Configuration
Motor Matching
Drive System Selection
VFD Configuration
Performance Testing
Export Packing
Installation Guidance
Technical Support
Spare Parts Supply