What you left unanswered:
On April 7, 2019 at 14:45, Zohan said...
Is bar 2 psi? If not tell me what you have in psi.
Is 12L, gpm? You have 12gpm? If not, then what do you have?
You did not clarify 12: at all. For completeness I defined GPM, as well.
Taking you at your word,
1 bar, or 2 ba, can be converted to PSI, just as LPM can be converted to GPM.
you did not explain what you meant by "1 bar, or 2 ba." As you wrote it, it looks like you're saying that 1 bar is 2 ba. I don't know what ba means.
You wrote that it can be converted to PSI and LPM can be converted to GPM. But no, you did not explain it, because you did not include the conversion factors. Inches can be converted to furlongs, but that's not enough information to consider it an explanation of anything.
Let's stop now. He understands. And I'm picky about my definitions of things that are not our usual day to day activities.