Hello, everyone. I am testing a valve in which a PTFE chevron-type sealing system is used on a sliding stem. Is there any way of calculating even indicatively the necessary compressive force to be applied to the seals? If I increase or decrease the number of elements (e.g. from 4 to 5 or vice...
Hello everyone. I dimensioned a forged brass valve according to EN standard. Now i need to prove the correct design according to ASME standard.
I know that for ferrous material there is B16.34 but what about brass valve?
Can someone tell me which standard i need?
Thank you
Hello,
I have a simple question.
I know that many valves (gate, butterfly...) are casted in spheroidal graphite GJS 400-15 that is limited to -10°C but in the data sheet and PED certificate are marked up to -20°C. How is it possible?
Hello every one. I have a problem with flow coefficient of ball and butterfly valve.
I tried to calculate flow coefficient of some butterfly valves according to IEC and simulating the scheme indicated. All values obtained with CFD are very close to real values but other competitors declare...
Hi, I'm from Italy and I have a question about EN 593.
At point 4.2.3.1 of EN 593 it's indicated the maximum flow velocity of fluid in a butterfly valve. In the column of gaseos fluid there is the indication (at 1 bar). My question is: is the velocity limit indicated the limit of gaseos fluid at...
