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Perlite grades and filter speed

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  • Perlite grades and filter speed

    OK, just because I can't leave anything well enough alone, I've recently switched from 3um (27-m) perlite to 7um (23-s) perlite in my filter. Clarity is similar, but filtration time and peak pressure have gone up dramatically. You'd think using coarser perlite would reduce time and pressure. What am I missing?

  • #2
    Possibly you are letting more crap through the coarser cake that is actually clogging your screens. Maybe you should try precoating with the fine stuff and then body-feeding with the coarser stuff. I have had similar results to what you are describing. IMHO too coarse a filtrate will lead to crappy filtration runs. I'm hardly an expert but I have done what you have done with similar results. Just my 2 cents.
    Big Willey
    "You are what you is." FZ

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    • #3
      I believe BigWilley is correct. Maybe add some cellulose fiber to your pre-coat diet.
      Cheers & I'm out!
      David R. Pierce
      NABC & Bank Street Brewhouse
      POB 343
      New Albany, IN 47151

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