A detailed description, crosses axial flow impeller materials: steel, aluminum, stainless steel, ABS, glass, steel impeller diameter: ￠ 200 ~ 2400mm Application: building wall and roof fans with; transformers, chillers, cooling towers and other equipment; cooling fan with. Second, the hub axle, mixed (oblique) flow impeller materials: steel, aluminum, stainless steel, glass and steel impeller diameter: ￠ 150 ~ ￠ 1500mm Application: building fire smoke, pipe Axial, Francis, mixed flow exhaust fan to send use and so on. Third, the centrifugal impeller material: steel, galvanized steel, aluminum, stainless steel, glass and steel impeller diameter: ￠ 150 ~ 1200mm Application: building supply and exhaust fan use. Purification unit is equipped with air-conditioning equipment. Four fiberglass hood, impellers, hairdryer, volute, elbow, collector and other corrosion occasions matching.