Sartorius Stedim Biotech has launched the Sartoguard NF prefilter series. They feature a combination of high performance polyethersulfone (PES) membranes and nanofleece technology. The nanofleece technology provides an ultrafine fleece structure based on a small nanofiber diameter of 120 to 150 nm compared with the fiber diameter of conventional fleece materials of >500 nm. The resulting fleece structure offers enhanced clarification capabilities, even for extremely fine contaminants, along with a high dirt holding capacity, fast flow rates and high total throughput performance.
Sartoguard NF prefilters are the ideal choice for downstream protection of more expensive sterilising-grade and Mycoplasma-retentive filters. All active filter materials – membranes and nanofleece – of the prefilter series are made of polyethersulfone, thus ensuring a minimum extractable footprint. This enables users to easily implement Sartoguard NF into existing filtration processes utilising final filters already based on PES. Sartoguard NF filter elements are available in all common filter formats such as Sartoscale devices for small-scale filterability trials, as well as Midicaps, Maxicaps and standard filter cartridges for medium- and commercial-scale manufacturing. Sartoguard NF Midicaps and Maxicaps are the first fully gamma irradiatable prefilter series and can be easily integrated into single-use process equipment.
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