Lefilter’s self-cleaning air filter is used to purify the air at the inlet of the fan, the fresh air purification filter of the industrial plant, the air purification filter of the compressor air inlet, the air separation equipment, the blower, the gas engine, the oxygen production, the acid production, etc. It is a filter that purifies air as a raw material. It has no low season and is a hot-selling champion product of dust removal throughout the year.