FBCD series of mine explosion out of rotating axial local fan hosts work composed by two, two-stage impeller rotates in the opposite direction. That is one of the impeller rotates clockwise, counterclockwise rotation of the impeller K45 two main fan, leaf number two mutually prime. Air is obtained from the energy level after the second impeller wheel booster sent. In addition to increasing the secondary impeller flow energy, but also ordinary axial fan in both static vanes function at the same time to get oriented in the circumferential direction straightening velocity component K40 mine main fan, straighten out the main fan airflow impact, increased energy flow, reducing the wake vortex and reduce noise. In P ~ Q characteristic curve is a curve given number of intervals of the mounting angle, 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. Thus, the desired mounting angle of the fan should point in the process to determine the specific location. In order to facilitate the main ventilation system fan site commissioning, should choose the operating point close to the maximum or minimum installation angle of the fan. Main fan performance parameters, the main fan, provided by Zibo Zibo Blower Fan Factory Limited. Zibo Blower Factory Co., Ltd. (www.zibo-fengji.com) to provide "fans, fans of mine, mine fans, explosion-proof fans, high temperature fans, boiler fans" and other business, the company has a "cloud laugh" and other brands. Focus on the fans, ventilation equipment and other industries, in Shandong Zibo have higher visibility. Welcomes inquiries, Contact: An Jingli.