1. the blade is made of stainless steel or hot galvanized sheet, durable.
2 the standard fans parts are improved well. this design is developed together with korean partners.
3. concerning the round frame, its coated with zinc-180g/sqm.
4. practices show, for the best ventilation, its optimum installation is above the feeding trough. the inclination angle had better be from 15 to 30 degree. between the fans bottom and ground should be 2.7meter height.
5. every 6 meter, one fan is installed.
6. certification: ce, iso9001
specifications 40"(diameter of blade) 380v/50hz/3phase
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