I watched a similar pump do its job during a hydrostatic test I was
monitoring. The input was regular water line pressure of 100 psi, the
output went up to 100,000 psi. We got a leak at 76,000 psi that dumped
the pressure to 10,000 psi in less than 10 mS - no water in the test
chamber, but it sure was hot!

-John

On Mar 6, 9:57 pm, Uncle Fuzzy wrote:
It's a compressed air actuated piston pump that will deliver very high
pressure oxygen to YOUR cylinder from a not-so-high pressure supply
cylinder. I routinely get 2200 psi fills even when our supply bottle
is down to 400 psi. It's a very clever (if expensive and not quick)
device that uses shop air acting on a large piston which drives a
small piston pump to compress the oxygen. The shop air and oxygen
never touch each other.