JBC type flat bag filter dust from the cabinet, cleaning agencies, fan, hopper and ash devices and other components, the flat bag filter compact structure, simple operation, easy maintenance and easy layout, using 729 polyester bag Polyester for media, with high strength, heat resistance, anti-acid, anti-alkali, anti-temperature, long life and other advantages. Second, the product features: boot due to indoor blower vacuum caused by dust, the dust and gas from the intake port to the filter box, after filtering through the dust dust bag attached to the outer surface of the bag, the bag attached to the outer wall of dust gradually increased, a sharp rise in the resistance of the unit, the fan stops and mechanical rapping cleaning mechanism automatically start working, forcing fouling whereabouts through dust and ash hopper discharge device, clean air through the filter into the clean room by the wind to the interior organs or the atmosphere, so as to achieve the purpose of purifying the air or gas collects dust particles in the solid material. This unit is suitable for building materials, ceramics, metallurgy, casting, mining, coal, electricity and mechanical ventilation dust and chemical industries, and for dust collection. Help to improve working conditions and environmental protection.