To meet the needs of coal mines, we invented the patented explosion-proof technology of the coal mine-extracted main fan and, combined with the parameters of the mine ventilation network, developed the extractable surface axial flow main fan and coal mine extraction of small and medium-sized coal mines. The highest static pressure efficiency of the device reached 86%, reaching the advanced level of the leading mining fan. The materials used in this machine have passed the friction spark test of the Testing Center of the Chongqing Branch of China Coal Science Institute and have reached the explosion-proof requirements. The explosion-proof performance of the machine has passed the explosion-proof inspection of the National Quality Inspection Center for Explosion-proof Electrical Products.

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The primary axial fan is used for ventilation of a particular mine or a wing of a mine, also called a main fan;
The auxiliary fan is used to adjust the amount of wind in the branching airway in the mine ventilation network and to assist the primary fan in working;
The local fan is used for local ventilation of the roadway where the mine does not have a through-flow and does not open.