For testing of valves you can use the EN 12266-1
Industrial valves—Testing of valves —
Part 1: Pressure tests, test procedures
and acceptance criteria — Mandatory
requirements.
In the example p.2.9
They give bij the values R/T (1176) en a/R (0,008)
for Kr/(E(2a))= 3,1*10^-4 ???
I can't read this out the table.
I have translate de line(0,005)in a function y = 45055x-2,6472; when x=1176 y= 3,36*10^-4
and line (0,02) in function y = 114x-2,1453; when x=1176...