... PS,PAN & PVC Ultrafiltration (UF) Membrane Filters are an asymmetric semi-permeable membrane made of high molecular chemical material ... of pressure, dissolvent or small molecular can permeate membrane and become product liquid by collection, while large ... of separating, concentrating, and purifying substance;Ultrafiltration (UF) Membrane FiltersItem: UFM90, UFM160, UFM200, UFM4040, UFM8040, UFM4021 ...