How to set the valve stem diameter
Check the standard, there will be the corresponding pressure, diameter of the smallest diameter of the stem, such as gate valve is GB/T12234-2005, sorry ah, I do not have information on the ball valve, you go to check
You can refer to the size of the sleeve of the pneumatic actuator which is matched with the ball valve
The ball valve standard does not specify the diameter of the stem, which are required to set the careful calculation
