Which gas has the lowest condensation temperature?

[lancejen]

I was trying to make liquid oxygen out of pulluted oxygen, only to have the thermal regulator broken with a little bit of liquid oxygen spilled around.
I am guessing that's probably due to liquid condensation in gas pipe?
So perhaps the proper way to do it is probably cool other gass with lower condensation temperature and use the piping themselvs as cooler?
If that's the case, which gas has the lowest condensation temperature?

[AlexMBrennan]

Hydrogen
http://steamcommunity.com/sharedfiles/filedetails/?id=917848919

[sgargoyle]

http://steamcommunity.com/sharedfiles/filedetails/?id=918781860 your just using the regulator to roughly add a valve on the out flow and slow it down so its only firing about once ev er 5 seconds 200g/s on the valve should do it but tec hnically as long as its less than what the pump is giving it will slow down the regulator and keep it from over heating in the first place. that regulator i have set up there has made huge amounts of -230 hydrogen and has never once over heated