Stand-alone environmental purification equipment (Unl-Filter) is to introduce American Fuller Company, a small technology eighties environmental purification equipment. This small-scale economic and practical environmental purification equipment; simple structure, easy installation, easy maintenance (within the filter type) is mainly used for database top and bottom, warehouse roof, and a variety of transportation emissions and dust and other dust collection point, the aircraft used polyester filter, the inlet temperature <120 ℃ effect of dust 99.8%. For special purposes can provide temperature, corrosion-resistant material with stand-alone environmental purification equipment.