Explosion-proof motors "220V Cooling Fan" fan motors for different places have different effects classification: something different blade applications is different, as previously curved blades for low-voltage, high speed is not the case and, if necessary air volume , may increase the number of leaves, can be used for high-speed applications, such as planer. then curved "220V Cooling Fan" blades for high pressure, high speed situations, power tools, the blade is preferred curved blades. warp . blade for forward and reverse rotation of the motor forward curved blade type characteristics are as follows: "220V Cooling Fan" leaves relatively short, small moments between the blades, leaf number, low noise, low pressure, air volume, low efficiency, wind the radius of curvature of leaves, high efficiency. Ex Motor Material: In addition, according to the fan blade material can also be divided into plastic fan blades and aluminum fan blades of two.