In P ~ Q characteristic curve is a curve gives a number of mounting angle every fan, but in fact each mounting angle (30 o, 31 o, 32 o, 33 o, 34 o, 35 o, 36 o, 37 o , 38 o, 39 o, 40 o) can be selected. Therefore, the required fan mounting angle should point in the process to determine the specific location. In order to facilitate the main ventilation system fan mine fan site commissioning safety certificate should not be the choice of the operating point close to the maximum or minimum installation angle of the fan. According to user needs BK54 fans, matching supply available for the protection of the fan switch cabinet factory. The electric control device for motor overload, loss of pressure, short circuit and other faults can be reliably protected. Which is provided with a quick implementation of motor reversal means, when you need to reverse the anti-wind turbine, press the stop button until the fan stops and then press the reverse button. K40 blower fan _ _ Zibo Blower Factory Co., Ltd. in Wuhai by Zibo Blower. Zibo Blower Factory Co., Ltd. (www.zibo-fengji.com) strong, credible, Shandong Zibo fan, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Zibo Blower into the brilliant and you work for a better future!