Why are gate valves generally not used to throttle water flow?
A. Rapid changes in flow direction inside the valve cause a large unrecoverable system head loss.
B. Gate valves experience stem leakage unless they are fully open or fully closed.
C. The turbulent flow created by a partially opened gate valve causes excessive seat and disk wear.
D. Flow rate through a gate valve is not proportional to the differential pressure across the valve.
Share your understanding of this question with the correct explanation.