RE: [new_distillers] Re: Length of tubing in the condenser coil
- Justin you are correct, you do not need to bother with the second needle
valve, and in fact you can use a half inch copper tube as the return line.
Think of it this way, if you are running the still at 100% reflux you want
all the liquid to flow back into the tower, if it doesn't, (second valve
turned off or flow restricted) what will happen is the liquid will continue
to pool up until it overflows through the section of pipe that the vapour
travels upward towards the condenser. When I built my first still I didn't
use the "H" section as you are, I used an elbow and placed a tongue inside
of the elbow to make the returning liquid drop into the centre of the
scrubbers. I welded a fitting under the elbow and fitted the tap to this.
The two tubes in the copper end cap you speak of only has to be slightly
different in height, make the one that flows to the valve as flush as
possible with the base, you can even try a slight thump on this tube with a
hammer or similar to make the liquid pool in it's vicinity. The return line
only needs to be slightly higher, this height is not critical. Although any
great pool will cause the liquid to loose too much heat and consequently,
the liquid will drop a lot further down the tube before returning to a
Yours in Spirit
From: justin_dittmann [mailto:justin_dittmann@...]
Sent: Friday, 25 June 2004 10:22 AM
Subject: [new_distillers] Re: Length of tubing in the condenser coil
Thanks Tony, I bought 6m of 1/4" and coiled if up last night. 5m was
spot on and I have ~1m left for the collection and reflux return
tubes. Excellent. I appreciate your advice guys, that coil chewed up
a lot of copper ;). Also got some nice brass fittings and a needle
Actually, on the needle valve bit, I also read and saw some pictures
that suggested using only one needle valve on the collection tube
and saving some $$ by not buying or using a second needle valve on
the returning reflux tube as you can just run the reflux return tube
back into the column without the need for a valve.
I understand this concept and why you can do it. Now, obviously I'm
new to this and haven't done a batch yet. For easy of use (learning)
and later on, would you recommend getting a second needle valve for
the reflux return or just use the straight return tube? If going the
straight option with no valve, how high should the return tube
intake be above the collection tube intake (as this is going to
affect the volume that collects here)? I'll be using a 2" copper end
cap where my distillate will collect and my reflux and collection
Thanks guys, sorry for the questions.
--- In email@example.com, "Ackland, Tony (CALNZAS)"
> I'd suggest that 5m would be suitable.New Distillers group archives are at http://archive.nnytech.net/
FAQ and other information available at http://homedistiller.org
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