DL series bag filter is a kind of multi-functional filter equipment with such features as a novel and compact structure, simple and flexible operation, energy conservation, high efficiency, closed working and good adaptability. it's widely used in chemical, coatings, printing inks and food industries. This type of filter includes single filter and double filter, forming a complete set with a conveying pump mounted on a mobile trolley. The protection net of the filter bag is stainless steel, while there are two material for the other, carbon ateel or stainless steel, which is optional according to customers' different filtering medium.