The G4-73 boiler blower, an industrial centrifugal fan, is a classic industrial centrifugal boiler blower (ventilator) designed specifically for boiler air supply and large-volume ventilation in industrial settings. It features high efficiency, low noise, medium and low pressure, and high flow rate.
I. G4-73 Boiler Blower – Industrial Centrifugal Fan Model Meaning
G: Represents boiler (Guo Lu) blower (corresponding to induced draft fan as Y)
4: Total pressure coefficient is approximately 0.4
73: Fan specific speed is 73
Model number example (№12D):
12: Impeller diameter 12 decimeters (1200mm)
D: Drive method is direct coupling drive with coupling
II. G4-73 Boiler Blower – Core Applications of Industrial Centrifugal Fans
Main: Air supply systems for 2 to 670 t/h steam boilers in thermal power plants (supplying combustion-supporting air to the furnace)
General: Mine ventilation, factory and workshop ventilation, industrial gas transportation, and air supply for air conditioning systems
III. G4-73 Boiler Blower – Industrial Centrifugal Fan Performance Parameters (Standard Conditions)
Conveyed Medium: Air, Temperature ≤ 80℃
Airflow: Approximately 10,696 to 952,530 m³/h
Total Pressure: Approximately 615 to 8300 Pa
Power: 5.5 kW to 1600 kW
Model Range: No.8D to No.29.5D (Over 10 Specifications)
Efficiency: Over 80%, with Good Energy-Saving Effects
IV. G4-73 Boiler Blower – Industrial Centrifugal Fan Structural Features
Impeller
12 backward-inclined airfoil-shaped blades, welded structure
Excellent aerodynamic performance, high efficiency, low noise, and high strength
Balanced and corrected for smooth operation with minimal vibration
Casing
Welded steel plate volute, sturdy structure
Good overall rigidity, suitable for continuous operation
Drive Assembly
D-type drive: motor and fan shaft directly connected by elastic coupling
Bearing box with oil lubrication / water cooling (high-temperature type)
Inlet
Convergent streamlined collector to reduce airflow loss
Adjustable Damper (optional)
Petallike air volume adjustment, wide adjustment range
V. G4-73 Boiler Blower Industrial Centrifugal Fan Rotation and Outlet Direction
Rotation Direction: Left-Hand (L) / Right-Hand (R) (Viewed from the motor end)
Outlet Angle: 0°, 45°, 90°, 135°, 180°, 225°, 270° (Optional)
VI. Differences between G4-73 Boiler Blower and Y4-73 Industrial Centrifugal Fans
G4-73 (Blower): For air supply, temperature ≤ 80℃
Y4-73 (Exhaust Fan): For flue gas exhaust, temperature ≤ 250℃, requires a high-efficiency dust collector (≥ 85%) in front.
VII. G4-73 Boiler Blower Industrial Centrifugal Fan Applicable Industries
Electric power, metallurgy, chemical engineering, building materials, papermaking, boiler factories, thermal power plants, centralized heating
