Question: liquid pressure
Question: liquid pressure
(OP)
Hi community!
sorry, this may be a stupid question :D and not sure where to post it..
I have the following case: a tank with a pipe connected to its bottom, closed with a plug is partially filled with a liquid (red); the tank is pressurized with compressed air (light blue) from its top, let's say at 8 bar.
Valve at the bottom is opened, so the pipe is filled with liquid.
In this situation the manometer will read 8 bar.
Now, I'm closing the valve and I'm depressurizing the tank from the top: I have atmospheric pressure in the tank now.
What value the manometer will read? I think still 8 bar?
sorry, this may be a stupid question :D and not sure where to post it..
I have the following case: a tank with a pipe connected to its bottom, closed with a plug is partially filled with a liquid (red); the tank is pressurized with compressed air (light blue) from its top, let's say at 8 bar.
Valve at the bottom is opened, so the pipe is filled with liquid.
In this situation the manometer will read 8 bar.
Now, I'm closing the valve and I'm depressurizing the tank from the top: I have atmospheric pressure in the tank now.
What value the manometer will read? I think still 8 bar?

RE: Question: liquid pressure
Andrew H.
www.MotoTribology.com
RE: Question: liquid pressure
So it will be more than 8 bar.
If you then isolate the bottom section this will stay at 8 bar providing there is ZERO leakage across the valve or change in temperature. Any losses of fluid will reduce pressure, any positive change in temperature will increase pressure
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RE: Question: liquid pressure
RE: Question: liquid pressure
What you will be reading is a gauge pressure ! be specific about the unit absolute or effective.
my 2 cents.
Pierre