Hi David - If you have access to Scientific American archives/The Amateur Scientist/ 1950-1980 there are many discussions of DIY vacuum tech ancillary to every- thing from homebrew Crooke's Tubes, Cyclotrons, you name it. Might help - Who knows... "8) ... On 10/30/17, Richard Pytelewski wrote: > David: > > > I am sure there is cost component here but the pressure you are talking > about are used in freeze dryers; i.e., lyophilizers. Nothing about that > technology is cheap but rooting around in that engineering area may provi= de > the answer. Perhaps a starting point: > http://www.labconco.com/category/freeze-dry-system-accessories > > > Good luck! > > > Rich > > Freeze Dry System Parts & Accessories - > Labconco > www.labconco.com > A wide selection of accessories for use with commercial and laboratory > freeze dryers to meet any lyophilizing needs. > > > > > ________________________________ > From: piclist-bounces@mit.edu on behalf of Van > Horn, David > Sent: Monday, October 30, 2017 12:52 PM > To: Microcontroller discussion list - Public. > Subject: [EE] Vacuum plumbing > > > Is there a good laymans guide out there to creating a vacuum system? Val= ves > etc > I am gearing up to produce small tubes filled with low pressure gases lik= e > neon/argon/xenon and I need to construct a manifold that I can use for th= e > vac and gas process that won't leak as my gas volumes are very small. > Also leaking would contaminate the mix and possibly my gas supply as well= , > since it's glass flasks at below ambient pressure. > > Most valves available at common sources leak badly in this application. > > Pressures inside will be 10-20 microns up to maybe 4 torr. > > > > -- > David VanHorn > Lead Hardware Engineer > > Backcountry Access, Inc. > 2820 Wilderness Pl, Unit H > Boulder, CO 80301 USA > phone: 303-417-1345 x110 > email: > david.vanhorn@backcountryaccess.com > > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > PIClist, Microchip PIC > www.piclist.com > The PICList is a collection of people interested in the Microchip PIC > processor. > > > > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > -- > 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 .