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More questions (was still design)

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  • Matthew O'Brien
    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
    Message 1 of 7 , Sep 6, 2001
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      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
    • Tony & Elle Ackland
      Matt, ... The control with a gate valve will probably be too coarse - not give you the precision you need. Check with plumbing suppliers, hydroponics
      Message 2 of 7 , Sep 6, 2001
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        Matt,

        > The closest I can find is a brass gate valve - would this
        > do instead?

        The control with a gate valve will probably be too coarse - not give you
        the precision you need. Check with plumbing suppliers, hydroponics
        suppliers, refridgeration dudes, etc

        > 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?

        I have a wee bit of brass in mine. It is reported as corrosion resistant
        to alcohol. For more information about using Brass, see
        http://www.brewinfo.com/mybrewery97/mybrewery3.html

        Tony
      • 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 3 of 7 , Sep 7, 2001
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          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 4 of 7 , Sep 7, 2001
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            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 5 of 7 , Sep 8, 2001
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              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 6 of 7 , Sep 8, 2001
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                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 7 of 7 , Sep 11, 2001
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                  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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