Thanks @TheObturator.
The valve will lift at set pressure but say any upstream leak drops the pressure by 5 bar (valve set pressure is say 300 bar) then the system pressure would rise to 305 bar before the valve lifts right?
Yes, I agree this leak will be fixed asap ideally but sometimes slow...
@GBTorpenhow
The leak is externally i.e. through the body seal of the relief valve. Please see the image I have attached in the above comment. This would mean there is a pressure drop occuring through the leak which will also cause dynamic loss. So, just like inlet loss scenario, this loss will...
Thanks @Latexman for the reply.
Is there any reference that I can consult to calculate how much pressure drop can occur. Such as an API standard or similar.
Hi LittleInch
Thanks for your reply. Please see attached sketch of a relief valve (just as an example). If there is a leak through the O-ring (marked in red), that would cause a pressure drop. For this pressure drop (similar to inlet loss), the relief valve won't lift at the set pressure and...
Hi All
Pressure Relief Valve failure due to internal leakage is a common scenario. However, for external leakage i.e. if the leakage occurs through the external seals of the PSV, could it lead to overpressure? Some cartridge type relief valves are installed with O-rings on the outside diameter...
