M6-31, M7-16 series of pulverized coal fan, for use of coal transportation. Is based on the actual situation of the user, the development and design of energy-efficient products. Abrasion resistant, high efficiency, low noise, good gas flow stability, performance curve flat, efficient wide area, compact, easy to maintain. Fan made of single inhaled, can be made smooth rotation and reverse rotation in two forms. Face from the motor, if the impeller rotates clockwise, called D-blower to "right", said; if counterclockwise rotation of the impeller, called L-blower to "left".