FRP centrifugal fan is based on parameters of metal type 4-72 fan and made of glass fiber reinforced plastic composite materials. Fans of the series can transport containing acid and alkali ingredients and chemical composition of corrosive gases. Conveying gases do not include viscous substances, containing dust and hard particles = 150mg/M3, gas temperature 70 ?, relative humidity 100%. the fan has a high strength, light weight, easy to aging, good corrosion resistance, low noise and smooth operation and so on.