I see lots of pictures on instagram of people who will place their stainless solvent tank on dry ice and complete and extraction. Dry ice( or a mixture) can reach temperature ranges lower then what ball valves are limited to.
Is there some special ball valve that everyone is using? Would running this way cause problems over time?
Typically the bottom of a collection vessel is put in dryice, or a single column pre-run. Very rarely would a ball valve make direct contact with dryice, and thus I doubt the ball valves would ever reach below -60(or whatever most ball valves are rated at).