Are all Class 150 flanges compatible with a Class 125 thru-bolted butterfly valve, where the valve does not have thru-bolt holes? Obviously, I'm asking about flanges with the same NPD as the valve.
If not, what determines which Class 150 flanges are compatible with the butterfly valve, since no...
I understand what Pressure Rating is. What is Reverse Pressure Rating or Minimum Pressure Class?
Can a fitting have two different values of Reverse Pressure Rating, as is the case with the Pressure Rating of a relief valve?
I understand what Pressure Rating is. What is Reverse Pressure Rating or Minimum Pressure Class?
Can a fitting have two different values of Reverse Pressure Rating, as is the case with the Pressure Rating of a relief valve?
