Quote: (Originally Posted by
abowie)

4 bar (under 60psi) per minute, especially with iddle biddy Rebreather tanks.
I am actually much more concerned filling big cylinders rapidly, since the high flow rate can give particles significant force.. I'm really not concerned about the cylinder heating (its a huge heatsink), I am more worried about heating at the valve and especially particle impingement..
I don't have a problem if someone is filling very small cylinders even 400psi per minute since there is very little gas flow, but since they are small it doesnt take long to fill them so why not go slow.... but big cylinders even 100psi per minute is high..