An air-operated isolation valve requires 3,600 pounds-force applied to the top of the actuator diaphragm to open.
The actuator diaphragm has a diameter of 8 inches.
If control air pressure to the valve actuator begins to increase from 0 psig, which one of the following is the approximate air pressure at which the valve will begin to open?
A. 32 psig
B. 45 psig
C. 56 psig
D. 72 psig
Show Answer
Answer: D
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