Many industries on the cooling fan speed requirements, the higher the speed, the larger the wind, are generally based on industry demand to determine the speed, speed and DC has no direct relationship to see how much cooling fan speed! There is no fixed standard for the speed of the fan, because the key to heat dissipation lies in the heat transfer efficiency of the contact surface and the amount of wind, which is usually determined by the size of the fan and the speed of the wind resistance, and the equilibrium value should be the product of the two as a regular value. The above is a brief introduction to the rotational speed of the cooling fan in Dongxingyue. A good cooling fan can not only maintain the normal operation of the equipment, but also improve the efficiency. It is best to choose reliable manufacturers of cooling fans, if you want to know more about the cooling fan knowledge can follow us  http://www.dxymotors.com。