Fan manufacturers ranked by type and operating conditions: for large-scale turbomachinery, look to Shangu (Shaanxi Blower) or Shengu (Shenyang Blower); for Roots blowers, consider Shandong Zhanggu or Changzhou Dalijie; for industrial ventilation, look to Shangfeng Gaoke or Jintongling; and for air conditioning terminal equipment, consider Yilida.
First, determine the required airflow and pressure, then select the appropriate manufacturer.
I.
Large-scale Turbomachinery: Shangu, Shengu
Shangu Power (founded in 1968): A leader in large industrial fans, blowers, process gas compressors, and axial-flow compressors; an expert in distributed energy system solutions (covering the full chain of equipment, EPC, service, operations, and intelligent systems)—the top choice for large-scale metallurgy, petrochemical, and air separation projects; Shengu SBW (Shenyang): A “pillar of national industry” and a key player in large-scale petrochemical and nuclear power projects (ranking first in the industry by brand index)—specializing in high-end engineering for axial-flow and large centrifugal fans.
II.
Roots Blowers: Zhanggu, Dalijie
Shandong Zhanggu: Offers Roots blowers, vacuum pumps, Roots steam compressors, multi-stage centrifugal blowers, air-bearing blowers, and single-stage high-speed centrifugal blowers (often paired with pneumatic conveying systems)—a major player in wastewater treatment aeration and powder conveying; Changzhou Dalijie: Specializes in Roots blowers (including DJSR standard, compact, high-temperature/high-pressure, stainless steel corrosion-resistant, and explosion-proof series); clients include Nine Dragons Paper, Longking Environmental, Zijin Mining, PetroChina, and China Huadian—the go-to specialist manufacturer for Roots blowers in wastewater treatment, pneumatic conveying, and desulfurization/denitrification applications.
III. Industrial Ventilation: Shangfeng, Jintongling, Yilida
Shangfeng Gaoke (Zhejiang): Axial flow, heat exchange, centrifugal, and smoke exhaust systems (featuring high static pressure, high-strength steel, and aerodynamically optimized blades)—suitable for large industrial plants and infrastructure ventilation; Jintongling: Centrifugal fans (boiler induced draft, kiln forced draft, environmental dust removal); Yilida: HVAC terminal systems (axial flow, external rotor centrifugal)—the choice for HVAC and light industrial ventilation (industry reputation: high-temperature and high-wear industrial applications remain to be proven).
IV.
Selection by Type
1. Axial flow: High air volume, low pressure (general ventilation, workshop/greenhouse exhaust); 2. Centrifugal: Medium-to-high air volume, high pressure (duct transport, dust removal, boiler forced/induced draft); 3. Roots: Constant-volume positive-pressure transport (sewage aeration, pneumatic conveying, desulfurization); 4. Industrial blowers: Large-scale air supply (blast furnaces, petrochemicals); 5. High-temperature/wear-resistant: Material selection determined by medium temperature and dust concentration (corrosion-resistant stainless steel, wear-resistant liners).
V.
Five Key Selection Factors
1. Air Volume (Q): m³/h (calculated based on process air exchange rates or transport volume); 2. Air Pressure (P): Pa (to overcome resistance from duct elbows, valves, and filters; total pressure Pt); 3. Power Rating: kW (Power = Air Volume × Air Pressure / Efficiency; rotational speed conversion via affinity laws); 4. Medium Characteristics: Temperature (high-temp induced draft), dust content (wear resistance), corrosiveness (anti-corrosion/stainless steel)—determining material and structure; 5. Efficiency: Polytropic efficiency (imported technology >78%) and variable frequency speed control (energy savings >30%).
VI. Key Considerations for Overseas Buyers
First, certifications: CE/ISO and ATEX explosion-proof ratings (for mining and chemical applications); second, electrical specifications: 50/60Hz dual-frequency compatibility (e.g., Zhanggu MC series); third, spare parts: availability of impellers, bearings, and seals; fourth, customization: high-temperature/high-pressure capabilities and stainless steel/corrosion-resistant options (e.g., Dalijie supports non-standard designs); fifth, payment terms: 30% deposit with the balance due after acceptance.
Industry experts advise evaluating fan rankings based on type and pressure: major players include Shangu and Shengu (large-scale units); Zhanggu and Dalijie (Roots blowers); Shangfeng and Jintongling (ventilation); and Yilida (HVAC).
Buyers should match requirements regarding airflow volume, pressure, and the operating medium before negotiating prices.
