1. advanced automatic process 2.aviation aluminum alloy hub 3.special push-pull device 4.six strict quality inspection

1.the outline border adopts advanced automatic  process,more accuracy and corrosion resistance

2.the hub was made of aviation aluminum magnesium alloy,light weight,high strength and good tensile

3.the stainless steel was made in one time punch,the figure's angel is reasonable,so small noise and big capacity,the safety  is very good

4.shutter adopts special push-pull device,ensure to open and close cmpletely,so the shutter is water-proof, wind-proof and dust proof.

5.strap adjust automatially,no need manual adjustment during life time

6.double blacing belt transpoter,europe industrial standard motor

7.special motor hole wind shield ,avoid wind losing to reach the best wind suck effect

8.the six strict inspection process : noise inspection ,vibration test,concentric performance test,fan blade rotation test, wind capacity test and efficiency test.

HIGH LEVEL EXHAUST FAN