Dominic,
Nitrile appears to be the same thing as Buna-N, which is what I use for my main
chamber seals. so Yea, I'd say they will work.
If it helps, the o-rings for my electrical pass troughs were found at the
plumbing store, and originally used to repair water faucets (btw, my latest
chamber vent valve is a simple brass garden hose bib faucet with whatever they
used for a rubber seal)
Of course there is always a difference between "what's best" and "what works", I
tend to go with things that work, even if they are not the best :)
So far I've only found two things that I couldn't pull a good vacuum on.
#1 Wet painted wood
#2 Petroleum jelly based ointment that found itself onto my filaments (which
held a good vacuum until the heat was applied)
Take Care,
James Lerch
(My telescope construction,testing, and coating site)
"Anything that can happen, will happen" -Stephen Pollock from:
"Particle Physics for Non-Physicists: A Tour of the Microcosmos"
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----- Original Message -----
From: "Dominic-Luc Webb" <dlwebb@...>
To: "VacuumX mailing list" <VacuumX@...>
Sent: Tuesday, December 16, 2003 13:22
Subject: [VacuumX] nitrile rubber rings, or?
On the continuing saga of the electrode-through-chamber story...
I now secured some green TIG welding rods and see that this is
the material for my first aluminizing attempt.
For feed-throughs I plan to use glass as insulator with a hole drilled
through it for a conductive rod to pass through, using o-rings to
seal the vacuum. There is a decent assortment of sizes, but I have
no idea about best material. The shops here have nitrile rubber. Is
this OK material, or someone know this will not work (outgassing, etc)?
Dominic-Luc Webb
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