Try the automotive world perhaps?  Lots of vacuum lines/diverters in=20
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 o=
f
> leaks.
> The system needs three shutoff valves.  I used ball valves, and I'm findi=
ng
> 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 w=
ho
> could suggest relatively inexpensive valves that I could use?   The syste=
m
> 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 controlling
> the flow of air and other gases. No liquids, nothing harsh.
>
> Thanks.

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