The 11-62 series low-noise multi-vane centrifugal fans have been designed and produced according to the requirements from the increasingly developing purification industry and environmental protection and noise decrease. The fans adopt the multi-purpose optimized design schemes in aspects of noise, effciency. various pneumatic parameters it fulfills the finest overall frame performace matching. It has sound pneumatic performance. The paddle-wheel, pulley have been templemented with strict static, dynamic balancing correction. Therefore it the features such as smooth running,low vibration,long life and so on. It is widely applicable for kitchen exhaust. Range hood or ventilation, air-exchange in the public places such as the canteens, guesthouses, restaurants,eating establishments etc. It is fit for use in the puoduction equipments such as grain, chemical, plastic machineries and so on.