Pressure Safety Valves
Pressure Safety Valves
(OP)
Could anybody tell me if there is a temperature rise during opening of a pressure safety valve?
Situation
Pressure safety valve is set at 895 bar(g) the outlet is atmosheric there is at max. a back pressure of 0.2 bar(g).
The liquid has a cP value of 25cP and density of 850kg/m3.
The flow is 954 litre/hour.
Situation
Pressure safety valve is set at 895 bar(g) the outlet is atmosheric there is at max. a back pressure of 0.2 bar(g).
The liquid has a cP value of 25cP and density of 850kg/m3.
The flow is 954 litre/hour.





RE: Pressure Safety Valves
If you are worried about a surge then this could happen when the valve re-seats. Reseating is equivalent to the flow stopping and this is how surge is generated.
Best regards
Morten
RE: Pressure Safety Valves
RE: Pressure Safety Valves
Coming to your question, it is very basic and you should know the pressure temperature relationship yourself.
Good luck,
RE: Pressure Safety Valves
I am sorry I did not mean to be rude I did not notice that I was writing in capitals.
Quark,
Beside that this is basic for you, the only thing I come up with is that there would be a temperature rise due to wriction inside the PSV.
RE: Pressure Safety Valves
Friction can't cause significant change in the temperature unless the liquid is circulating.
RE: Pressure Safety Valves
Best regards
Morten