rad and coolant,

[sdelanty at sonic.net]

>- -> Well you could do that, but I was kinda thinking of a ball valve and
>- -> a stepper motor, there's gotta be some out there already. It's also a
>- -> lot easier from the packaging/plumbing standpoint, and I would think
>- -> would afford infinite control within system capabilities.
>
> I'd love to find something like that.  All of the commercial valves
>I've seen take more torque than a reasonably-sized stepper can give, so
>it didn't look practical to cobble something up from pieces.

  Do You really need something as tight sealing as a ball valve?
  I would think a butterfly valve would be fine and take less torque
  to operate... 

                Steve Delanty  <sdelanty at sonic.net>

                    Measure it with a micrometer,
                                  mark it with chalk,
                                              cut it with an axe...