The filter of one bag of types of DL series is that a kind of structure is novel , small , easy and simple to handle and flexible , energy-conservation , working high-efficiently , airtightly, the ones that have a good adaptability apply the filter plant multi-purposly, it is extensively suitable for such trades as chemical industry , coating , printing ink , food ,etc.. This machine is designed into the single filter, pair filter, and can form a complete set and send the pump and assemble in pushing the car portably . The filter bag catch net of the filter is made of stainless steel , other parts have carbon steel and stainless steel to make two kinds, for filtering the choice of user of different medium.