Ok. For the "chart" I linked, it's in scfh (surface cubic feet per hour). First thing you need to do is convert your
desired lpm to scfh.
View attachment 183778
Next, you take the converted lpm to scfh number of 31.785 scfh and multiply it by 3.15 (from the other link I posted yesterday), which is the correction factor for running helium through an argon regulator/flowmeter. So, doing so gives us 100.12275 scfh. Now you convert that number back to lpm.
View attachment 183782
So, you need to set your regulator/flowmeter at about 47.25 (~47.5) lpm to get your helium gas to come out of your argon regulator/flowmeter at 15 lpm
actual.
Clear as mud?