High-volume centrifugal fan

Product Description

High-volume centrifugal fans are centrifugal ventilation devices that deliver large volumes of gas under low air pressure conditions. Based on blade shape, low-pressure, high-volume centrifugal fans can be divided into two main categories: forward-curved multi-blade and backward-curved. Our company can design and manufacture centrifugal fans according to user needs, ensuring high air volume output while maintaining sufficient air pressure.

Product Applications

* Factory Ventilation: Improves air quality, reduces temperature, and removes harmful gases such as carbon monoxide and methane. In mines, it can be used in conjunction with methane monitoring systems for directional ventilation to ensure operational safety.

* Exhaust in Painting Workshops: Automotive painting workshops require timely removal of paint mist and solvent evaporation gases; low-pressure, high-volume centrifugal fans can meet the high-flow exhaust requirements.

* Dust Removal in the Electronics Industry: Works in conjunction with dust removal equipment deliver dust-laden gas to filtration devices for air purification.

* Blowing in the Steel Industry: Provides combustion air for equipment such as blast furnaces, improving combustion efficiency.

* Petrochemical and Power Generation: Used for combustion air supply and gas circulation in thermal and nuclear power generation and the petrochemical industry. Type C and D blowers, when equipped with heat-dissipating impellers or water cooling, are also suitable for high-temperature environments such as baking ovens, drying ovens, and high-temperature gas circulation systems.

Wastewater Treatment Aeration: Centrifugal blowers are preferred for scenarios with large-scale treatment, deep water, and high air volume requirements. Compared to Roots blowers, centrifugal blowers are more energy-efficient under long-term operation at high flow rates.

Waste Incineration: Provides combustion air to incinerators and guides the flue gas treatment process.

Pneumatic Conveying: Used for pipeline transportation of bulk materials such as grain, feed, and cement, replacing manual labor and improving efficiency.

Building Ventilation and Air Conditioning Systems: Used in large buildings such as shopping malls, office buildings, hospitals, and schools as supply or exhaust air equipment for central air conditioning systems to maintain constant indoor temperature, humidity, and air circulation.

Agriculture and Horticulture: Used for greenhouse ventilation to regulate temperature, humidity, and carbon dioxide concentration, promoting crop growth; with sensors, automated intelligent ventilation can be achieved.

Air circulation in transportation facilities: Used for smoke extraction and ventilation in subway tunnels to ensure safe evacuation in emergencies; centrifugal fans are also needed in enclosed spaces such as trains and ships to provide fresh air and remove exhaust gases.

Technical Advantages

1. Large Air Volume and Low Pressure

Optimized for high-flow, low-resistance ventilation scenarios, it can deliver a much larger air volume than conventional fans at the same power. Its core advantage lies in "low pressure and large air volume"—maximizing airflow delivery capacity rather than pursuing high-pressure output.

2. High Efficiency and Energy Saving

Mainstream models achieve aerodynamic efficiency of 65%–85%, with some high-efficiency products reaching over 90%. With variable frequency control, the speed can be adjusted according to actual flow requirements, saving 20%–40% more energy than traditional fixed-speed fans. Newer models achieve energy efficiency level 2, saving 18%–22% in energy, resulting in significant long-term operating cost advantages.

3. Stable Operation and Low Noise

The impeller undergoes precise dynamic balancing (balance level up to G4.0), resulting in minimal vibration during rotation. With the addition of a sound-absorbing structure, both aerodynamic and mechanical noise are kept to a low level. The low-noise model achieves ≤75dB(A) noise at a distance of 1 meter from the equipment, making it suitable for noise-sensitive environments. Built-in silencers at the inlet and outlet significantly reduce operating noise.

4. Compact Structure and Easy Maintenance

Mainly composed of an impeller, casing, air inlet, transmission assembly, and base, it has fewer parts and a low failure rate. Routine maintenance only requires cleaning the impeller and checking bearing lubrication. The A-type direct drive eliminates the need for a pulley, resulting in high transmission efficiency, fast response, and lower noise. Optional accessories include inspection doors, drainage holes, and air dampers for further convenience in daily operation.

5. Wide Media Adaptability

Different materials can be selected as needed: Q235 carbon steel is suitable for general operating conditions; 304/316L stainless steel is suitable for corrosive gases; and aluminum alloy impellers are suitable for explosion-proof applications. It has a wide operating temperature range, with standard models ≤80℃ and high-temperature models reaching 550℃–750℃. Furthermore, it can be manufactured in explosion-proof (BGFBL) and corrosion-resistant (FGFBL) versions to meet the needs of special working conditions.

6. Flexible Installation

The low-pressure, high-volume centrifugal fan is compact and can be installed horizontally or vertically. The inlet and outlet directions are flexibly adjustable (six angles are available: 0°, 45°, 90°, 135°, 180°, and 270°), making it suitable for space-constrained environments (such as machine rooms and suspended ceilings). The integrated steel base with spring vibration dampers provides high stability.

Technical parameters