elan
Contributor
The pressure rating of these cylinders is 300 Bar/4,351 PSI? Are they DOT (Department of Transportation) stamped? I have been looking for some with US standard cylinder threads. Do you know who makes them and their capacity?
I would bet what the OP meant by 300bar tank is in fact either 3445 or 3500 tank. which is 232 - 240 bar with "300bar" valve.
OP you can use both 200 bar and 300bar valves. 200 pro valve will give more flexibility Both will handle that pressure