The FLJ series fan is composed of a single-phase asynchronous motor or a three-phase asynchronous motor, a volute, an impeller and mounting brackets, which is characterized by compact structure, light weight, small size, high efficiency, large air flow, and high air pressure. At the same time, customers can change the assembling ways of bracket to achieve installation in various positions. It is extensively used for pipeline dust removal, exhaust heat removal, advertising air flushing model, environmental protection and pollution control, apart from for forced ventilation of various control facilities and electronic devices on the ground.