I don't have a 68/45 in my shop, but fill times typically match the 70 lpm rate.
68 cubic inches is about 1.11 liters.
Filling a 2L cylinder takes 8 min 25 sec. So filling a 68 cu in bottle to 4500 psi from empty should take about 4 min 40 sec.
Originally Posted by p8ntninja
How long does it take to fill a 68 or45 bottle?