pneumatician
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RBF Male joint
where I can buy a RBF (2L, 0,5L) with the joint male? 24/40 or 29/32
TIA
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j_sum1
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i found these on a quick search:
http://www.ebay.com./itm/Pyrex-Boiling-Flask-Round-Flat-Bott...
http://www.ebay.com./itm/Lot-of-3-Kontes-500mL-Round-Bottom-...
 
Or you could get one custom made pretty easily.
[Edited on 1-6-2017 by j_sum1]
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JJay
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Why would you want one?
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Praxichys
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Use a double-male adapter and you can attach any normal flask you want to it.
http://www.ebay.com/itm/Glass-Distillati-on-Adapter-Connecti...
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j_sum1
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If for some reason you wanted to go straight from flask to condenser and minimise joints, then I guess it would be useful.
But I am interested in what kind of problem might be solved with this setup that could not be solved some other way.
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DJF90
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This is a fairly standard arrangement for Schlenk tubes and flasks. Don't think I've ever seen one without a tap on the side though.
[Edited on 1-6-2017 by DJF90]
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pneumatician
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first is a 1000ml Male 29/42 Joint, flat bottom and used, sorry I need new never used.
second is 500mL Round Bottom Flask for Rotovap used too, 34/45, 34/45??? what the hell is this? 
no, I could not get one custom made pretty easily. I talked with some guys, and after some point no more replies, others the quality of some items
purchased for QC reasons is not enough for my. I need the most perfect joint and some items from china glassblowers are very bad. Stoppers "dance" in
the female joint, others with the joint too much short or too much long...
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Amos
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I will second Praxichys's suggestion to use a double male adapter. It's cheaper and you have a solution if you ever need to do this down the road with
a different-sized flask.
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pneumatician
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I want a HERMETIC closure for volatile liquid, so the question is, exist some glass item offering HERMETIC closure? I have the idea, well the liquid
fly but with a male joint can't escape between the walls of the joint. After the volatile liquid pass this point I think is in the superior piece
condensed so can't escape in vapor form and fall again in the RBF and the cycle start again (circulation). Well perhaps some liquid is lost when
falling between the joints but a lot less than putting the female in the lower place, no?
I can't use a cheap RBF and close the mouth with fire because is for plant tintures and the risk of boom is too great, no?
so I need something with the round bottom, all glass, new and offering HERMETIC closure!!
I see this "pressure bottles" from chemglass... but the stopper is not glass, right? what use have this? the closure is HERMETIC??
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j_sum1
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If you don't mind paying for some shipping to the US, you might try contacting Chemetix. Actually, you might PM anyway. He will probably know of
good glassworkers closer to where you live if he cannot help.
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