Compared with the common axial fan,HF-Ⅰtype axial fan and HF-Ⅱmulti-wing adjustable axial fan have a larger air volume,a higher pressure and other features,which are widely used for ventilation in the mining factories,civil buildings and etc.In addition,the profile of HF-Ⅱis shape with Chromium Blade and the angle adjustment can be arbitrary.With the CAD optimal design,the wheel and the bladesare are casting from good qualtity aluminum alloy in precision,which allows high intensity and a certain ability to decay.HF-Ⅰ/Ⅱare suitable for the places that don`t contain flammable,explosive and corrosive gases with the temperature no higher than 80℃.