On 11/28/2014 08:18 PM, svejkovat wrote:

I'm trying to control an adjustment knob in another room.

I realize that this response is a little late
and you may have already arrived at a solution
to the knob problem.

My first thought upon reading the statement of
need is "why turn a knob?" You seem to be
fixated on turning an existing knob to control
the flow. Could you not replace the knob operated
valve with a valve more suited to being controlled?
At only 24psi you could even make a valve from
PVC plastic. A screw shaft driving a cone into
a seat comes to mind. Unless you're dealing with
oxygen or some exotic gas in which case special
requirements apply.

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