Measure flow rate with a manometer (pressure gauge)

AI Thread Summary
To measure the air flow rate from a leakage in a 50-liter volume pressurized to 1 bar, the initial air volume needed to maintain that pressure must be calculated. When the pressure drops to 0.5 bar, the volume of air that has escaped can be determined by the difference in air volume required for each pressure level. The discussion highlights that the flow rate will vary with the changing pressure difference. Using example figures, if 10 liters are needed for 1 bar and 5 liters for 0.5 bar, the leakage rate could be estimated at 10 liters per minute. Understanding these calculations is crucial for accurately assessing leakage in pressurized systems.
Xefyros
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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?
 
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The flow rate will change as the pressure difference changes.
 
scottdave said:
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)
 

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