As the core equipment of industrial ventilation, smoke exhaust, dust removal, and air conditioning systems, the performance parameters of centrifugal fans directly determine the operational efficiency and safety of the system. The following is a systematic parameter analysis based on national engineering standards and mainstream industrial models.
1、 Definition of Core Performance Parameters
|Parameter Name | Unit | Definition and Function | Typical Range|
|Airflow (Q) | m 3/h | Volume of gas transported per unit time, determining ventilation capacity | 380~400000|
|Total pressure (Pt) | Pa | The sum of static pressure and dynamic pressure, reflecting the ability to overcome system resistance | 190~20900|
|Static pressure (Ps) | Pa | Vertical pressure of gas on the pipe wall, used to calculate pipeline resistance | 100~18000|
|Shaft power (P-axis) | kW | Actual power consumption of fan impeller | 0.55~220|
|Motor power (P motor) | kW | Rated power of supporting drive motor, with a margin of 10%~25% reserved | 0.75~250|
|Speed (n) | r/min | Impeller rotation speed, directly affecting air volume and pressure | 96014502900|
|Efficiency (η) |% | Pneumatic efficiency, reflecting energy conversion level | 65%~85%|
|Noise (Lw) | dB (A) | Sound pressure level generated during operation, affecting environmental comfort | 65~95|
Note: The air volume is proportional to the rotational speed, the air pressure is proportional to the square of the rotational speed, and the power is proportional to the cube of the rotational speed.
Formula: image.png
2、 Comparison of typical industrial model parameters
|Model | Application Scenario | Airflow Range (m 3/h) | Full Pressure Range (Pa) | Motor Power (kW) | Blade Type | Material|
|4-72 series | General ventilation, exhaust, and air exchange | 3800~168000 | 190~1700 | 0.75~55 | Rear tilting fan wing | Carbon steel, fiberglass reinforced plastic|
|9-26 series | Boiler induced draft, high-pressure exhaust | 3780~180000 | 2100~5600 | 5.5~110 | Rear bending | Cast steel, heat-resistant steel|
|G4-73 series | Power plant boiler induced draft | 11000~220000 | 2300~10000 | 15~220 | Backward tilting | High temperature resistant alloy steel|
|HTFC-I/II type | Fire smoke exhaust (cabinet type) | 5000~120000 | 800~3500 | 3.7~75 | Forward/backward tilt | Galvanized sheet, stainless steel|
|Y4-73 series | Industrial dust removal | 6000~180000 | 1500~4500 | 7.5~90 | Backward tilting | Wear resistant coating steel|
Data sources: "Complete List of Centrifugal Fan Models and Parameters", "4-72 Centrifugal Fan", "G4-73 Boiler Induced Draft Fan"
3、 Key points for parameter selection according to application scenarios
1. Building ventilation and air conditioning system
Airflow: 1000~50000 m 3/h
Wind pressure: 500~2000 Pa
Noise requirement: ≤ 75 dB (A)
Recommended models: 4-72, KT11, HTFC-V (rear tilting)
Features: Low noise, medium low voltage, high efficiency
2. Fire smoke exhaust system
Airflow: ≥ 10000 m 3/h
Wind pressure: ≥ 1500 Pa
Temperature resistance requirement: Continuous operation at 280 ℃ for ≥ 30 minutes
Recommended models: HTFC-I, GDF, Shandong Greide cabinet fan
Material: Galvanized steel plate, stainless steel, in compliance with GB 51251-2017 mandatory certification
3. Chemical and anti-corrosion environment
Gas characteristics: containing acid, alkali, and organic solvents
Material requirements: fiberglass reinforced plastic (FRP) or 316L stainless steel
Recommended models: Kaiyi 4-72 fiberglass fan, Yingfei YFBCSL
Anti corrosion grade: ISO 12944 C4 or above
4. High temperature flue gas induced draft (boiler/kiln)
Temperature range: 150 ℃~480 ℃
Airflow: 20000~220000 m 3/h
Wind pressure: 3000~10000 Pa
Recommended models: 9-26 G4-73、Y5-48
Structural requirements: heat-resistant bearings, water-cooled bearing boxes, anti dust design
5. Precision instruments and medical equipment
Airflow: 5~600 m 3/h
Wind pressure: 500~80000 Pa (high static pressure)
Noise requirement: ≤ 55 dB (A)
Key technologies: Dynamic balance accuracy ≥ G6.3 level, oil-free bearings, variable frequency control
Application: Ventilator, gas sampler, fuel cell gas supply
5、 Key considerations for selection
The air volume and pressure need to be accurately calculated according to the system resistance, and it is recommended to reserve a safety margin of 10%~15%
It is strictly prohibited to use "free installation" as a gimmick to obtain subsidies. The contract must specify the equipment brand, warranty period, and decay rate
Fire fans must pass 3C certification and provide a type inspection report
A cooling system should be installed in high-temperature environments to prevent bearing overheating and failure
Flexible joints must be installed during installation to prevent vibration from being transmitted to the duct system
Shandong Ruidian Environmental Protection Technology Co., Ltd. is located in the high-end equipment manufacturing base of Luozhuang District, Linyi City. It is a modern enterprise that focuses on the research and development, design, production, and manufacturing of multi-stage centrifugal blowers, centrifugal vacuum pumps, Roots blowers, pneumatic conveying systems, and soil remediation integrated special equipment. Its telephone number is 13287120066.
