The purpose of the dual column screen changer The dual column screen changer is particularly suitable for the melt filtration requirements of high-level automated production lines. The product is suitable for the production of products such as boards, sheets, films, pipes, wire drawing, optical fibers, cables, etc. Suitable raw materials include: PP, PE, ABS, PS, PET, PVB, PBT, TPE, PMMA, PC, PA, etc. The dual column screen changer provided by BATTE can be divided into: standard dual column hydr