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Re: [new_distillers] More questions (was still design)

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  • Dick
    Hi Mathew, I think you ll find that a gate valve won t give you as fine a control over reflux as a needle valve will - especially when it s just about closed.
    Message 1 of 7 , Sep 7, 2001
      Hi Mathew,
      I think you'll find that a gate valve won't give you as fine a control
      over reflux as a needle valve will - especially when it's just about closed. A
      gate valve is basically an on/off device whilst a needle valve is continuously
      adjustable over it's whole range.
      If you get stuck and can't find an au/nz supplier get back to me, I
      know of at least 1 uk supplier who will supply & ship anywhere at the wave
      of a plastic card.
      Don't know if brass has different properties when you're up-side-
      down but in uk I've never had any problems soldering the two together !! It's
      good soldering practise anyhow but just make sure both surfaces are clean,
      use a good flux and enough heat - solder should then flow round the joint
      like sheer magic .............

      > Hi again everyone,
      >
      > You may recall I am currently building a still, and have been asking lots
      > of
      > questions!  Sorry - but heres some more!
      >
      > I've just been going around the place getting the bits and pieces I need,
      > and have run into trouble trying to get a needle valve for the spirit
      > outlet.  This is what is detailed in the plans, but no-one has been able to
      > get one for me.  The closest I can find is a brass gate valve - would this
      > do instead?  (I'm guessing so, but thought that I would check)  I'd put
      > that
      > onto the outlet pipe using brass compression fittings - does the plastic
      > inside the compression fittings react with alcohol?
      >
      > Secondly, are there any problems with having brass in the column?  I am
      > planning on putting a male/female screw fitting between the head and
      > the
      > column, so the head can be removed, and the only way I seem to be
      > able to do
      > this is with two brass tube bushes.  Any problems with that?  I assume
      > brass
      > and copper can be soldered together?
      >
      > Thanks again.
      >
      > Matt
      >
      >
      >
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      --
      Dick on the LangWang
      Dedicated to Growing Old Disgracefully
    • mobrien@zoology.uq.edu.au
      Thanks TOny and Dick, Still can t find any needle valves around here - I did find one, but it was rated at 5000psi, and cost $152, and I thought that was too
      Message 2 of 7 , Sep 7, 2001
        Thanks TOny and Dick,

        Still can't find any needle valves around here - I did find one, but
        it was rated at 5000psi, and cost $152, and I thought that was too
        much!

        I found this online - is this the type I'm after? Or isn't 1/4 turn
        sensitive enough? I'm thinking that buying online might be the
        easiest!

        <http://www.cornerhardware.com/hardware/iteminfo.pl?
        action=iteminfo&item=719852928027>

        Matt
      • Tony & Elle Ackland
        Matt ... any of these at http://www.cornerhardware.com/cgi-bin/search.pl?cat_id=4&qstring=needle&count=7 look good. Great prices too ! US$2 - US$3. I ve just
        Message 3 of 7 , Sep 8, 2001
          Matt

          > I found this online - is this the type I'm after?

          any of these at
          http://www.cornerhardware.com/cgi-bin/search.pl?cat_id=4&qstring=needle&count=7
          look good. Great prices too ! US$2 - US$3. I've just priced the same thing here at NZ$28 (US$12)

          Tony
        • Dick
          In message , mobrien@zoology.uq.edu.au writes ... I wouldn t have thought ¼ turn enough for fine control of reflux, mine has approx.
          Message 4 of 7 , Sep 8, 2001
            In message <9nc9ot+kgni@...>, mobrien@...
            writes
            > Still can't find any needle valves around here - I did find one, but
            > it was rated at 5000psi, and cost $152, and I thought that was too
            > much!
            >
            > I found this online - is this the type I'm after?  Or isn't 1/4 turn
            > sensitive enough? I'm thinking that buying online might be the
            > easiest!
            I wouldn't have thought ¼ turn enough for fine control of reflux, mine
            has approx. 4 turns from full closed to full open. Have a look at the
            Radiospares/Electromail web site on http://rswww.com/, either do a search
            for 'plumbing, valve, needle' to see their selection or look at part # 262-0713.
            This is a foot mounting needle Vv. that takes a ¼" OD Cu pipe in & has a
            3/8" ID hose fitting on the output.
            Anyone whose had anything to do with electronics or radio/tv repair
            in uk over the past 50yrs will know of RS but they've now got a very good
            selection of reasonably priced (well for uk anyhow !) plumbing bits & pieces
            in stock - including 54mm T pieces, end caps & bends & AND THEY TAKE
            PLASTIC !!!!!!!!!! The needle Vv. was selling for UKP10.46 + tax + pp this
            morning.
            >
            --
            Dick
            Fra' Auld Reekie
          • mobrien@zoology.uq.edu.au
            Thanks for all the responses. After about 20 phone calls, I eventually found a place here in Australia that could get a 3/8 needle valve in for me. It ended
            Message 5 of 7 , Sep 11, 2001
              Thanks for all the responses.

              After about 20 phone calls, I eventually found a place here in
              Australia that could get a 3/8 needle valve in for me. It ended up
              costing $25 and has a 3/8 female bsp thread either side. What that
              means is you can put whatever attachment you want either side - I've
              got a 3/8 compression fitting one side (to take the copper pipe) and
              a 'tube nipple' the other, that a plastic hose can slide onto.

              The place also has heaps of sizes in heaps of different fittings - I
              also got a combination of fittings that will allow a digital
              thermometer with a 3mm probe to be put into the top of the head, all
              with a compression fitting so it can easily be taken in and out.

              Anyway, now I have all the bits for the column - now I've just got to
              organise the boiler (Jan, expect a phone call soon!)

              Oh, the place I got the fittings is called:
              PIRTEK
              and is a hydraulic hose and fittings specialist - they are at Waycol
              in Brisbane.

              Thanks again,

              Matt
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