I have built a system that utilizes 2 M-20 concentrators, a laboratory vacuum compressor and a 29 gallon holding tank. I compress the o2 up to 100psi. The system shuts off at 100 psi and turns on at 80 psi. This system lets me run a Phantom or a Barracuda at 100% for well over 2 hours at full blast!. That’s plenty of time to complete most projects. On a full day of work I have never run out of O2 as I rarely utilized 100% output for extended periods. Usually a project is broken up into periods of variable amounts of O2 use so when I am doing detail work with a small flame the system is building back up to 100% and shutting off.

Why deal with going to Tank pressures of 2000psi + when 100psi will do.