Centrifugal fan

Mingbo centrifugal fan series adopts advanced CFD simulation optimized impeller and volute design, delivering stable and high-efficiency airflow under high-pressure working conditions. Widely applied in duct air boosting and process gas transportation across chemical, metallurgical, power, glass, textile and environmental dust removal industries.

The fan housing can be fabricated from carbon steel, stainless steel or special alloy materials, with anti-corrosion coating options to achieve outstanding corrosion and wear resistance. The high-precision dynamically balanced impeller is equipped with sound damping structure, featuring low vibration and low noise performance, perfectly adapting to harsh industrial operating environments.

One fan frame size may correspond to multiple working points, and some models support multiple rotational speed options. Therefore, fan selection shall be based on the required airflow and total/static pressure, rather than only relying on the fan diameter.

Parameters to be confirmed for model selection

- Required airflow (m³/h)

- Required total pressure or static pressure (Pa)

- Gas type & composition

- Operating gas temperature

- Dust / particle concentration in gas

- Site altitude & gas density (if applicable)

- System resistance & ductwork conditions

- Power supply: voltage / frequency / phase

- Air outlet direction requirement

- Existing fan dimensions & data (for replacement projects)

- Order quantity & destination country

Fan Classification

1. Classification by total pressure

Classified by total pressure in engineering applications, with minor threshold differences among different standards:

Low-pressure centrifugal fan: Total pressure ≤ 1000 Pa (980 Pa in some legacy standards). High air volume & low pressure, suitable for workshop ventilation, air conditioning air supply and general exhaust.

Medium-pressure centrifugal fan: Total pressure 1000–3000 Pa (980–2940 Pa in some standards). Balanced air volume and pressure, used for dust collection, boiler induced draft, waste gas treatment and medium-sized pipeline systems.

High-pressure centrifugal fan: Total pressure > 3000 Pa, normally up to several thousand Pa; special single-stage or multi-stage models can reach higher pressure. Suitable for pneumatic conveying, high-pressure spraying, long-distance pipelines and furnace air supply. Typical models: 9-19, 9-26 series.

2. Classification by application & conveying medium

General ventilation fan: For conveying clean air at ambient temperature.

Dust exhaust fan: Wear-resistant and anti-clogging design for dust-laden gas.

Boiler forced draft / induced draft fan: G series for forced draft, Y series for induced draft. Induced draft fans adopt temperature-resistant, wear-resistant and dust-proof structure.

Explosion-proof fan: Matched with explosion-proof motor and spark-free structure, for flammable and explosive gas.

Anti-corrosion fan: Constructed with stainless steel, FRP, PP and other corrosion-resistant materials.

High-temperature fan: Made of heat-resistant steel, equipped with bearing cooling and thermal insulation casing, used for kilns, sintering lines and hot air circulation.

Typical Application Scenarios

Industrial workshop ventilation & air exchange: Welding fume extraction, heat treatment and assembly workshop exhaust; medium & low pressure fans with pipeline air discharge.

Central air conditioning & building air return: Forward multi-blade or backward-curved cabinet fans, prioritizing low noise and stable operation.

Dust removal system: Matched with pulse dust collectors and cyclone separators; medium-pressure backward / radial wear-resistant impellers for dust gas treatment.

Boiler & kiln forced / induced draft: Forced draft for oxygen supply; induced draft for high-temperature flue gas extraction (temperature, wear and dust resistance required).

Pneumatic conveying: For cement, fly ash, grain and plastic pellets; high-pressure low-flow or dense-phase conveying systems, commonly 9-19,9-26 and multi-stage fans.

Chemical anti-corrosion exhaust: FRP, PP, 316L stainless steel construction for acid mist and solvent vapor.

Fire smoke exhaust: Special high-temperature smoke exhaust fans, passing 280 ℃ continuous operation test complying with building fire codes, usually supplied as cabinet units.

Other applications: Hot air circulation for drying furnaces, wastewater aeration, printing & coating line exhaust, laboratory fume hood exhaust.

Daily Maintenance

Impeller cleaning: Regularly remove accumulated dust, sticky deposits and oil stains. Dust buildup will destroy dynamic balance and trigger vibration. Maintenance cycle: monthly for heavy dust environment; 1–3 months for general environment.

Bearing lubrication: Periodically replenish lithium grease for rolling bearings (avoid overfilling). For oil lubrication, check oil level, oil quality and cooling water circuit. Sliding bearings require monitoring of oil film and bearing shell clearance.

Fastener inspection: Regularly retighten foundation bolts, casing flange fasteners, impeller rivets/bolts and coupling bolts.

Transmission parts: Check belt tension & wear; inspect coupling alignment and elastic elements.

Long-term shutdown: Rotate the rotor periodically to prevent rust; keep the unit dust-proof and moisture-proof, and test motor insulation regularly.