LuckyWinner
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NPT threaded Steel Fitting to Ground Glass Joint?
im trying to attach a NPT threaded Steel Fitting to Ground Glass Joint 24/40 , 29/32.
I was looking for a PTFE Ground Glass Joint to NPT thread adapter but I cant seem to find one.
how do people usually do this?
Ground Glass Joint > PTFE adapter > NPT threaded steel fitting
needs to be high vacuum tight.
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monolithic
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NPT pipe --> NPT hose barb --> vacuum tubing --> 24/40 vacuum adapter?
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Fyndium
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Turn a PTFE fitting and make a screw cap for it. I'm gonna do one for my SS pot to attach all kinds of ware from droppers to stillheads to stirrers.
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LuckyWinner
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this would work BUT I need a wide opening, your method will cause a tiny opening.
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LuckyWinner
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does a 'GL' thread fit on an european 'M' thread (used for bolts and nuts usually) ?
for example:
you have a PE /PTFE 'GL 25' thred , a M25 nut could be tightly screwed on this?
[Edited on 14-5-2021 by LuckyWinner]
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draculic acid69
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Quote: Originally posted by Fyndium  | | Turn a PTFE fitting and make a screw cap for it. I'm gonna do one for my SS pot to attach all kinds of ware from droppers to stillheads to stirrers.
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Might want to keep the Teflon talk to yourself.
Ppl who post about that disappear.
https://www.sciencemadness.org/whisper/viewthread.php?tid=14...
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Fyndium
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I see. I haven't offered anything for sale, though, but I do have made adapters from teflon for bleeder tubes, thermometers, and lastly, I made a new
locking nut for my sep funnel which had it's original missing. It was nonstandard thread, so I had to play a little and it's a bit tight, but in this
instance it is only good thing. I also made multiple flange gaskets out of 1mm PTFE sheet.
Possibly a reason why people don't actually get along with these projects is because they gave up doing whatever it was, or haven't got to order PTFE
stock, or are just too busy. Turning adapters for sale would be quite unprofitable to many, because it actually takes quite a lot of time with manual
machinery to turn them, and plastic is also a bit tricky, although easy to machine, so running many failed parts will be unavoidable. I have noticed
though that if some project is made for profit, it usually gets expedited to a significant degree, compared to just having some hobby project done,
which you deem unnecessary, but possibly fun.
My SS pot project will be protracted too, because I need to re-weld the nominal thread adapters to it, and in worst case, replace the whole flange
because it's too thin to hold any actual pressure. To admit it, the biggest c*ckblock is that I don't actually need the pot for anything in the close
future.
[Edited on 15-5-2021 by Fyndium]
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BromicAcid
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Solid teflon stopper, drill it out, tap it, sounds like it could be a plan.
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unionised
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Have you considered hot melt glue?
And if the working temperature is too high for that, have you considered thermal expansion?
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draculic acid69
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| Quote: Originally posted by unionised | Have you considered hot melt glue?
And if the working temperature is too high for that, have you considered thermal expansion? |
What chemicals react/dissolve hot melt glue and which ones don't?
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draculic acid69
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Sounds like the best way.
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