Auto wouldn't be good enough. Already tried specialty hardware. They start
leaking around the shaft at about 3 torr. No apparent way to seal those
tighter.
On Nov 1, 2015 4:49 PM, "Neil" <picdude3@narwani.org> wrote:

> Try the automotive world perhaps?  Lots of vacuum lines/diverters in
> those nowadays.  And there's always mcmaster.
>
> Cheers,
> -Neil.
>
>
> On 11/1/2015 1:07 PM, David VanHorn wrote:
> > I have a vacuum project in the works, and I've just isolated one source
> of
> > leaks.
> > The system needs three shutoff valves.  I used ball valves, and I'm
> finding
> > that they are leaking. Probably designed for positive pressure I'm
> > guessing.
> >
> > Is there someone on the list with vac experience down around 20 microns
> who
> > could suggest relatively inexpensive valves that I could use?   The
> system
> > is now built with 1/8 NPT but I could switch if I need to.
> >
> > These valves just need to be on or off, and they are used for controlli=
ng
> > the flow of air and other gases. No liquids, nothing harsh.
> >
> > Thanks.
>
> --
> http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist
>
--=20
http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.