Re: Diffusion Pump Design & Construction
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Thanks Ken
Yes I look forward to some input on this one.
I Have been thru the groups file section & photo and found them
to be very helpful. Mr. Lerch has also ?been extremely help to, but always
more questions. If I buy I want to be sure that the Eq is correct for the
project due to my budget. That¡¯s one of the reasons I was looking at Diffusion
design and construction, but may end up out sourcing? for both units.
The chamber is in work, so one step at a time until completion.
Thank for the welcome
Bill
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From:
VacuumX@... [mailto:VacuumX@...] On Behalf Of Ken
Sent: Tuesday, May 04, 2010 7:28 AM
To: VacuumX@...
Subject: [VacuumX] Re: Diffusion Pump Design & Construction
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?
Hi Bill...
Welcome to VacuumX.
Good questions, some answers should be forthcoming from some of the members
soon. In the mean time, there is a lot of information that you can check in the
VacuumX Group's files, photo's and link's sections on the web page while you
are waiting for answers.
Ken Hunter
--- In VacuumX@...,
"B." wrote:
>
> Hello Group
> This is my first posting to the group.
> I am in the process of preliminary thoughts relating to a coating system.
I was looking for information to look at designing and constructing a diffusion
pump verses purchasing one, off coarse sizing is part of the process to. The
size of the containment is or will be 36" in diameter @ 14 inches in
depth, so approximately 8.25 sq.ft. internal volume minus internal components.
> I have at my disposal a reasonably complete machine shop so this aspect is
complete.
> So that being said....
> 1. Is there a rule of thumb for sizing the Roughing pump for reasonable
pump and makeup due to degassing time?
> 2. Same Q relating to the diffusion pump?
> 3. More Q's guaranteed, relating to instrumentation etc.
>
> Thanks and look forward to your responses.
> Bill
>
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