Sartorius Stedim Biotech has launched the Sartoguard NF prefilter series combining high performance polyethersulfone (PES) membranes and nanofleece technology. According to the company, the newly developed nanofleece technology provides an ultrafine fleece structure based on a small nanofiber diameter of 120-150 nm compared with the fiber diameter of conventional fleece materials of >500 nm, resulting in enhanced clarification capabilities.   Sartoguard NF prefilters are designed to offer cos...