Step: 1: Pressure or Flow
All high-pressure regulators are designed to accept incoming pressure of 150bar+ from the cylinder. This makes them a high-pressure regulator. But what do you require on the outlet of the regulator. What does your instrument/analyser/GC require? Pressure or flow?
Typically, a gas detection instrument will require flow (0.5l/min) where a gas analyser may require pressure at 1 or 2 bar. The instrument, analyser or GC will dictate what is required.
Once this is determined then we can continue.