The single column hydraulic screen changer is a high-end screen changing and filtering system developed specifically for extrusion production users, especially suitable for the melt filtration requirements of high-level automated production lines. Suitable for the production of recycled granulation, cast film, blown film, sheet, sheet, pipe, wire drawing, polished rod, cable and other products. Applicable raw materials include: PP, PE, ABS, PS, PET, PVB, PBT, TPE, PMMA, PC, Pa, etc. The single c