KV-BW-DF low noise fan is of consummate craft and technological design, firm material, stable and reliable performace, orstanding noise-decrease effects.It has the features such as low noise, high efficiency, long life, easy installation etc. It is widely applicable for the industries and departments such as telecom, electric force, electrical, electronics, geology, coal mine, steamboat, paper-making etc. It is esp, fit for cooling, temperature-control, ventilation functions in the plastics; printing machineries, copying machine, drying machine, blown machine, underground facilities. Etc.