Thanks for the answer. Yes, I need to recalculate gas (methane) into air while keeping the flow rate. I looked at the formula:
https://www.mankenberg.ru/ru/55/UPLOAD/pdf/s33_3.pdf
good day! I did not find a suitable forum thread, so I am writing here ... There is a valve through which you need to drive gas under a certain pressure, physically there is no way to drive gas, so it was decided to replace the gas with air. Knowing the required pressure and gas temperature, how...