BillWann
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Posts: 15
Registered: 17-6-2019
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New high vac line
Getting ready to replace my old Vacuum system . The chemglass diff pump works well but I just got a much bigger Diffusion pump I will be using but I
will have to redo the whole line . being a pretty good glassblower helps . I just finished the new cold trap that does not use ln2 or dry ice so Iam
on the way .
[Edited on 29-1-2023 by BillWann]
 
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Chemetix
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Posts: 376
Registered: 23-9-2016
Location: Oztrayleeyah
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Mood: Wavering between lucidity and madness
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Very nice, I'm about to put together a high vac system myself. I was going to make something similar to the Arizona State University design, which
looks very much like the unit you built. But I also have a Turbo molecular pump that I need a controller for. I'm in the throes of adding the turbo in
the pump station design but bypassing it until I get a controller sorted.
Yes, being a proficient glassblower helps!
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BillWann
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Posts: 15
Registered: 17-6-2019
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That is the same one, its a wheeler diff pump . I have used a few turbo pumps but dont like them for chem Hi vac systems . I do have a turbo pump
hooked up to one of my vac ovens and it works good .
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yobbo II
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Registered: 28-3-2016
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The diffusion pump is a thing of beauty.
What size roughly are the holes (jets) that allow the oil vapour to emerge from the chimneys (underneath the dome shaped directors).
Is the size/number/area of the holes different as you go from the bottom chinney to the top?
I am currently trying to make a stainless steel diffusion pump. I have no clue as to what size to make the jets (I think that is the correct term).
Perhaps the exact size is not important as I do not understand what type of oil vapour flow conditions exist inside a diffusion pump.
You state you cold trap does not use LN2 or dry ice. What is a lam?
Yob
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