intermediate pressure

That is, rated for 50-80, 80-110, or 110-140 Psi? Too low will go into free flow, and too high won't give air, right?

Going back to regulator design, how was an IP range of approx. 125-145 psi chosen as the optimal range?

Hi everyone, I am new to this forum and to be honest, I have never scuba dived... However, I would like to use a scuba tank as an air compressor. I just came from the local scuba shop where they told me that it is quite simple to do (they use scuba tanks as air compressors themselves): just...