An air-operated isolation valve requires 2,800 pounds-force (lbf) from its diaphragm actuator and 4 inches of stem travel for proper operation.
The valve positioner can supply up to 117 psig of air pressure to the actuator.
What is the minimum surface area of the actuator diaphragm required for proper valve operation?
A. 24 square inches
B. 48 square inches
C. 94 square inches
D. 138 square inches
Show Answer
Answer: A
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