If you are testing the valve at low pressure- Pressure must be 0.5 bar. (as per supplementary test of API6d)
what about valves performance in standard 6d testings. do they found leak proof? (even after cycle)
If so, then i would recommend to increase pre-compression of seats in assembly...
I want to know whether their is a standard calculation for Ball valve ball diameter selection
As All Parameters in Ball valve Design are Dependent on ball Diameter.
I do know about the thumb rule for ball diameter selection ( approx. 1.5-1.7 times of valve bore)
Is their any justification for...
You can take multiplying factor 2.2
2A=Dc so ans of that integral is 2.2.
Didn't understand why did you calculated ball thrust as its value doesn't included in any formula.
Coefficient of Friction is 0.2 for which material?