The aerofoil-shaped fan blades of the cooling tower are made of aluminum alloy by hot extrusion, with a hollow wing-shaped cross-section, featuring light weight, high air volume, low noise, excellent balance, and long-lasting without corrosion or deformation. Compared to fans made of the same model with other materials, the fan has a 20% higher air volume at the same speed. The aerofoil fan diameters available range from 1200MM to 8000MM. The blades come in two widths: 260mm and 350mm, and three blade counts: 3, 4, and 6. The center hole diameter can be customized according to the motor or reducer. High-strength hollow aluminum wings are used, with the main shaft made of alloy material with a diameter of 36-50mm, hardness of 40Cr, and a total length of ≥1/2L, ensuring no cracking at high pressure and high speed. Multiple U-shaped clamps with a diameter of 14-16mm are used for fixation, allowing the blades to adjust angles and securely fasten the fan blades according to the selected air volume. Variety and flexibility in combinations: air volume ranges from 20,000m3/h to 900,000m3/h, with main shaft holes from 28mm to 80mm. Suitable for any type of cooling tower, widely used in square crossflow cooling towers, square (circular) counterflow cooling towers, and evaporative condensers, etc.