RE: [Distillers] Control valve for Nixon-Stone ?
I have been looking at using a couple of computer electronic kits to
do something along these line. The fist kit has analogue to digital inputs
and outputs plus digital outputs. The second kit will control stepper
motors. What my thoughts have been is to use the IO kit to monitor
temperatures and flow rates and to use the steper motor kit to adjust the
needle valves and gas flow(heat), I am also considering going to electric as
this is some what easier to control remotely. My other objective is to use
the IO kit to drive a web page so that the system can be monitored and
controlled remotely and send SMS messaging so that I can get to the kids
sport and stay in touch with what's happening. I have put the first kit
together and have started work on building the interfaces and software.
Stage one of the project is for the remote monitoring and logging.
Hopefully the data that I collect from this will prove that the concept will
work. I expect that the monitoring hardware will be under $100 dollars plus
an old PC. At present I expect that this is going to take me a few months
to get going so don't hold your breath.
From: Tony & Elle Ackland [mailto:Tony.Ackland@...]
Sent: Sunday, 10 June 2001 12:00 PM
To: 'Distillers newsgroup'
Subject: [Distillers] Control valve for Nixon-Stone ?
OK - who out there knows a little about a control valve suitable for
controlling a Nixon-Stone still head ?
Eg something CHEAP and EASY that uses a thermocouple in the vapour to
measure its temperature, then open or closes the distillate outlet valve to
adjust the amount of reflux happening in response.
It would replace the needle valve seen in
Sorta like whats described at
http://www.rvmobile.com/tech/trouble/solenoid1.htm , but better suited to
our set-up. It would need to be accurate/sensitive enough to change the
valve position, for temperature differences of say around 0.1-0.2 degrees,
and the valve only needs to be able to do say 0-100 mL/min flow. The
adjustments that the valve would need to be capable of would be in the
order of say 5 mL/min steps.
What else would be required to turn off the power to the still
(permenantly) once the outlet temperature gets above a particular
temperatures (eg 94C) ?
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