Centrifugal fan output decline may exist for the following reasons: 1: motor stator winding fault as local short-circuit caused the speed dropped 2: impeller may have to pay dirt with the load increase the impact of its speed 3: impeller unbalance (at the same time there will be abnormal vibration) 4: Are there obstacles inlet air intake of substances such as inlet valve off small or dirty air inlet filter clogged other reasons. Currently centrifugal fan Datong mine in China's stone processing enterprises jiexiu mine centrifugal fan, fan energy adjustment methods are relatively old mine centrifugal fans, generally use throttle. When using the throttle, the fan flow, mainly by adjusting the throttle valve or damper to be adjusted, throttle large fan, even more than fifty percent throttle Jinzhong mine centrifugal fan at low load, However, due to the presence of throttling losses and run deviate efficient district energy waste is very serious. And if you adjust the fan speed, it only can be canceled due to the loss of the throttle, and can ensure the fan is always running in the high zone, so you can achieve significant energy savings. It can be said to run the fan by adjusting the fan speed is an effective way of saving, which also reflects the building materials industry in a new production of the current trend. Jiexiu mine centrifugal fans, centrifugal fans of mine, Shanxi nagorye blower provided by the Shanxi nagorye blower limited liability company. Shanxi nagorye Blower Co., Ltd. (www.sxgfj.cn) (www.sxfjgs.com) strong, credible, Shanxi Xinzhou fan, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead nagorye blower and you hand into the brilliant, for a better future!