Refer to the drawing of four air-operated valves (see figure below).
Note: The valve actuators may be shown with or without air pressure applied.
Given:
- The direction of system flow is from left to right when the valves are open.
- The internal components for each valve are identical except for the orientation of the valve disk and seat.
- The valve actuators exert the same force on the attached valve stem for a given applied air pressure.
If each actuator is vented, which valve disk will remain closed with the most force?
A. A.
B. B.
C. C.
D. D.
Show Answer
Answer: C
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