Measure flow rate with a manometer (pressure gauge)

[Xefyros]

Hello!

I have a volume of 50 liters which I pressurize with air so that I read 1 bar on the manometer.
But there is a leakage in the volume so after 30 sec the manometer shows 0,5 bar.

What is then the air flow ( liter / min) of the leakage?

 

[scottdave]

The flow rate will change as the pressure difference changes.

 

[Xefyros]

The flow rate will change as the pressure difference changes.

Hello, maybe bad explained but I would want to know if you can count how much air you have to fill up the 50 liter volume with to get 1 bar (over) pressure and then how much air that has left when the manometer reaches 0,5 bar.
So let's say that you need to fill up the volume with 10 liter for 1 bar and 5 liter for 0,5 bar pressure -> then over 30 seconds it has left 5 liter ( from 1 bar to 0,5 bar) and we would then have ~~10 liter / min
(just example numbers)