All our sterile filters are FDA / EC validated and approved. "Sterile" means "free of microorganisms that are capable of reproducing itself".
A more scientific definitions of sterile is that a filter is defined as "sterilizing filter", when exposed to a concentration of 107 microorganisms (Brevundimonas diminuta) per. cm2 filter area and the filtrate is 100% sterile and therefore not containing microorganisms. Bacteria, for example. Coli and streptococci, have a size of typically between 0.3 microns and 9 microns, resulting in that the sterile filter has a Filtration of 0.2 microns or better.
P-SMF is a prefilter used to protect the P-SRF / PTFE sterile filter.
P-SRF is sterile filter using depth filtration to achieve an absolute retention rate of 99,99998% related to 0,01 µm.
PF-PT is a sterile membrane filter used in the most critical applications.
P-GS steam filter is used to sterilize steam and can also be used for "in place" regeneration of sterile elements.
P-BE & Ultra-Vent are vent filters for receivers. The main difference is that Ultra-Vent is a "one time use" filter whereas the P-BE can be regenerated.