1. Issues on Control Valves
What make a control valve becomes linear, equal percentage or quick opening control valve? Answer
Why flashing and cavitation are serious problem in control valve? Answer
What causing flashing and cavitation in a control valve? Answer
What is the current solution to flashing and cavitation in control valve? Answer

2. What make a control valve becomes linear, equal percentage or quick opening control valve?
The amount of flow produced with respect to steady increment in stem travel.
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3. Why flashing and cavitation are serious problem in control valve?
Erosion
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4. What causing flashing and cavitation in a control valve?
Hear sound of cavitation and flashing.
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5. What is the current solution to flashing and cavitation in control valve?
Read p.135 of Fisher Control Valve Handbook
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