DJF(b) serise double shuttersype(simple exhaust fan)

1.Fan frame is made in automatic process line,especially thick galvanized layer with extremely crrosion resistance.

2.High strength aluminum-magnesium alloy,reasonable angle,biggest air flow,

3.High precise microcomputer aided manufactured system,noise testing,running testing,speed rate testing,totaleffction testing.

4.Different materials upon customer's demand,iron,FPR,abs engineer plastic.could unload the safe net easily as the CAD optimized.

5.Adopt automatic belt tensioned so that it will not pine and drop and reduce the failure rate.