... with ventilation volume of 1,400~13,000m3/h, and can be widely used in refrigeration and ... rotor and blade, adopt double-sided dyamic balance.fan blade,rotor and grid is coated with plastic, ... and good corrosion-resistant effect,as well as enclosure.fan normal ambient temperature: -20-70 centigrade, if ... coustomer requirements.the insulation class of our current fan is B class and F class,with thermal ...