26
LMS Issue 3 | 2014
Food & Beverage
Expand the Lifespan of your Filter
U
se prefiltration to remove larger particles
(>10µ diameter) from fluid, so that one can
perform subsequent finer filtration without clogging that downstream filter. Pre-filters can be
made of fibrous media or membrane filters, and
have a larger pore size than the final filter. Add
an upstream pre-filter to extend the lifespan and
throughput of a filter. Organic solvents are most
often prefiltered through polypropylene pre-filters.
Aqueous solutions are most widely clarified with
glass-fibre prefilters with binder resin, which have
superior wet strength and can collect dirt from
heavily contaminated liquids.
Merck Millipore offers a variety of prefiltration
media to suit any application needs.
MF-Millipore filters are made from mixed
cellulose esters (MCE) and have pore sizes up to
5µm. They are mainly used for air monitoring and
contamination analysis for fuels and hydraulic
fluids and sterilisation buffers.
Nylon membrane and net filters are low in
organic extractables and have a broad chemical
compatibility. They are mainly used for particle
analysis, large particle filtration and prefiltration
of solvents.
Glass and quartz fibre filters have a high dirtloading capacity, a binder-less option and low
heavy metal content. These are mainly used for
pre