2.Motor;Both Chinese famous motor and Siemens motor are available.Motor voltage and frequency could be customized.Chinese famous motor,special design for fan,the first one put forward the phase lack protection device which could power off when shortage of electricity.Motor protection grade IP55,insulation Class:Grade F.

  3.Belt Pulley:Made of high strength aluminum-magnesium alloy by die-castig which reduces the weight of blade impeller complete,high corrosion resistance.Special reinforced ribs pulley design.Blast-sanding treatment for attractive appearance,eliminate internal stress to improve its own rigidity and stability,never broken.

  4.Bearing:Fan bearing adopts imported double-row bearing with special waterproof design,water can't enter.High strength,lower noise,maintenance free and long service life.

  5.Using high strenght nylon swung drop hammer opening deviceto ensure the shutters opening and closing flexible.

   6.Belts:Use imported belts,making sure long service life,free to maintain.