Tom, take a look at this website www.mcmaster.com type in Item # 43765K14
and click on catalog page. Is this like the filter you are talking about?

WD

"Tom S" > wrote in message
m...
>
> "MikeMTM" > wrote in message
> ...
> > Lee,
> >
> > I only use my Buon Vino filter rarely, and am not an expert on
> > filtration, but from what I've read, it's not so much an issue of pore
> > size, but of the nature of the pores. A membrane filter is basically a
> > thin sheet with lots of uniformly sized holes. the hole size is said to
> > be "absolute", as there are no larger ones. A depth filter, like the
> > Buon Vino pads, has a lot of different sized holes or channels, which
> > have an average, or nominal, size. As Tom points out, since there are
> > pores larger than the nominal size, there's a certain amount of larger
> > stuff that gets past. Just because the pads are rated .5 microns doesn't
> > mean they will stop everything of, say, one micron. <sigh> It takes a
> > better tool than a Buon Vino, I'm afraid. Even if one could contrive an
> > absolute filter for one, it probably wouldn't have the pressure to work.
>
> That covers the subject of pad filtration pretty well.
>
> > If anyone has found a way to do it, though, I'm all ears.
>
> You buy a 10" 0.45µ membrane cartridge, an Ametek (or equivalent) housing
> for it, some plastic fittings and hose. Hook the membrane cartridge in
> series with the output of the pad filter. Presto! Sterile wine. :^)
>
> Although membrane cartridges are expensive, you can re-use it many times
if
> the wine you run through it is well filtered to begin with.
>
> Tom S
>
>