HOMEBREW Digest #5591 Tue 11 August 2009


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Contents:
  valve help (Matt)

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---------------------------------------------------------------------- Date: Tue, 11 Aug 2009 15:42:57 -0700 (PDT) From: Matt <baumssl27 at yahoo.com> Subject: valve help I'm trying to build a nice bottle filling machine, and having trouble finding the right ON/OFF flow valve for this purpose. (BTW the beer won't be carbonated when I fill it.) The main thing is that this valve must be able to be cleaned well after every use. Pinch valves are ideal from this standpoint, but my machine uses vacuum to move the beer and hence requires rather stout hoses that probably can't be effectively pinched. The Blichmann 3-piece ball valve springs to mind since it can be totally disassembled for cleaning. But it has NPT connections and I think these would have to be unmated and cleaned after every use as well. Is that really feasible long term, i.e. can I mate and demate stainless steel NPT fittings over and over and still achieve a reliable seal? (And if not, then what in the world is the purpose of a highly cleanable bolted-body ball valve when it's saddled with NPT connections?) The seal has to be good, because of course air bubbles can ruin the beer almost as quickly and effectively as infection. I'd love for the valve to have hose barb ends, but any straight threads that seal against a rubber washer (garden hose, flare, etc) would work I think. The problem is finding a "cleanable" valve with these fittings. So far the only reasonable ideas I have are to convert a Perlick tap for this purpose, or to shell out $75 for a 3-piece Blichmann-like ball valve with triclamp fittings from McMaster-Carr. Can anyone suggest other ideas? I do have access to a good lathe, and milling machine. Matt Return to table of contents
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