Yes its ptfe
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Should be you would think, so no swelling. But still… Just a weird spot to consistently break. Might have to do with no cleaning it, and when the stuff dries up it might be doing something. Swelling around the stopcock? I dunno?
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heat is about the only thing that would swell it?
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I extract about 100f but this wasn’t during extraction 4 days after just setting there
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I think if you looked at the glass with a polariscope you’d see stress concentrated in that area.
Could be a bad annealing job? @david ?
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75/50 is the joint size he is asking about.
looks like a spherical joint.
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whats he wanting me to do? Can I help him find this draw? Can u help.ms.find it soxs
And what will it do
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For what? do you need a spherical joint?
If it is a sep funnel a standard taper 24/40 should work fine.
Perhaps @david didn’t understand you, or what you were asking for?
left over lye creating heat and swelling stop cock ?
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Nah,
The exothermic part is done before the liquid liquid extraction.
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So make sure i wait till extorhedmic is done always…I usually do …this one I waited
Guess back.to.Fing syphon
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how does the funnel work for separating pulls?
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Try 1 of those other ones with the Y. You should be bale to get everything out of it from the looks of the picture
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Shake it up like salad dressing and then wait it splits
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he is asking you for a drawing for an unrelated job it looks like?
Tell him 24/40 on the top joint is fine, and you want a rotoviz valve at the bottom.
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Are you venting? If your leaving solvent in there it could be causing the explosion. It could be solvent stuck in the ptfe stop cock hole too.
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Could it possibly be caused or aggravated by accidentally over tightening the stopcock nut from always rotating the valve one way? Probably not, but I’m always careful to only tighten the stopcock nut as little as needed to get a good seal.
Maybe the spherical joint was brought up because it could reduce stress on the skinny part of the funnel if the bottom was a spherical joint sitting on top of your receiving flask. It would allow for a little wiggle, where a standard taper is going to be solid, passing more stress to the weak part of the funnel.
Are you attaching anything to the bottom joint, or just draining into a tray/beaker or something @StoneD?
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it’s the summit elves…they come out late at night destroying Chinese glassware …I’ve seent them
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