Ultrafiltration (UF) is a membrane filtration process similar to Reverse Osmosis, using hydrostatic pressure to force water through a semi-permeable membrane element. In this method we use Pentair X-Flow hollow fibers.
UF is a barrier to suspended solids, bacteria, viruses, endotoxins, and other pathogens to produce water with very high purity and low SDI.
A pressure difference is the driving force for the membrane. The pressure difference allows the water to flow through the pores of the membrane. All matter larger than the pores is retained on the surface of the membrane. This process is called pore size exclusion. The membrane is called semi-permeability because it allows water to pass while it retains other substances. The pore size of the membrane determines the size of the particles that are being removed. If the pores are micrometer sized the membrane is called a microfiltration membrane, if the pores are smaller than a tenth of a micrometer the membrane us called an ultrafiltration membrane.