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Caveat:- I havnt done this and dont know anyone who has, it was just a thought. Commercial food mixers such as these have a variety of stainless bowls that may suit. The top lip is rolled and they

Hi There is an equation P=1000(1-square root(1-1600(t^2/d^2))) P outer pressure pound/inch t wall thickness d outer diameter of the chamber measured in inch I hope this helps, for me worked! Attila

Alfredo, I think it is OK. In spite of the fact that currently ball valves practically aren't used in industrial relatively big vacuum systems, they should be good for not a very big systems with

Vladimir, Is it ok to use ball valve to isolate the diffusion pump from the roughing pump, or should I use an angle valve? What is safer? Regards, Alfredo

Vladimir, I agree with you that the "vacuum" presure is irrelavant as a design parameter in this application. I will try 1/8 since the chamber is bell shaped. Thanks, Alfredo

Yes, I agree regarding the ribs. However I would like to note, that the ultimate vacuum is not important, because for ANY vacuum inside the chamber the pressure difference is NO MORE than 1 atm = 1

Alfredo, The Pyrex bell jars have thickness from 4.8 to 9.5 mm for the range of 10.25"OD x 12"H ... 18"OD x 30"H bell jars, and for the biggest bell jar the thinner (4.8 mm) walls are also meet the

It might be easier to answer the question ¨why is the sky blue¨ - - (really!!!!!!!!!!!). Your thickness will also depend upon your design parameters (maximum vacuum needed), process(es) used etc.

Vladimir, What thickness can the bell chamber be (not the base plate)? I would like to use the thinnest possible bell jar so I can save weight and money. Regards, Alfredo From: VacuumX@...

Alfredo, I guess, you can chrome it at any company providing auto wheels chrome coating. I think chrome is a good choice due to its very good adhesion to metals. However later there may be some tricks

Hi, I just got an 16" x 1" thick 1020 steel disc (SS was too expensive) for my new base plate. I turned it flat and to prevent rusting I would like to have it chromed. Is there any objections to

I bough them on eBay... Ken

________________________________________ The most fundamental human right is ownership of your own body. If you may not do with it however you please, you are not yet free. On Thu Aug 19 6:02 ,

Alfredo, For any valves I do not know a better place than eBay. Try also some companies who sell rebuilt vacuum components, PTB-Sales (www.ptbsales.com), Capovani Brs (www.capovani.com), BidService

Vladimir, Thanks for the info, they are cheaper than ebay! I am revamping my chamber and now need to get some ball valves for foreline, any suggestions on where to get good priced valves besides EBay?

Yeah I ain't dead yet! Still trying to make some room so I can get my system up and running, but it's hard when you've crammed a 50x90' shed's worth of stuff into a space half that in size! How's

Thomas.......... Good to see you still out there :_))))))) Drew in soggy Florida Sent: Wednesday, August 18, 2010 11:19 PM To: VacuumX@... Subject: Re: [VacuumX] Re: Wanted - Deposition

I want to say I just saw some on EBAY in the industrial sales area under "vacuum deposition" I think If you cant find any, I can send you one to get you going Drew in soggy Florida Sent: Wednesday,

15 kv AC is a lot easier and cheaper to make. There are endless 15kv "beer sign" transformers out on Ebay for sale. 15kv DC is just rectified AC so you get about the same thing only with the rectifier

Alfredo, Try also Thin Film Supply (www.thinfilmsupply.com.) I use them years, no problems so far. Best regards, Vladimir Chutko arainho_cl wrote: