An air-operated isolation valve requires 3,200 pounds-force from its diaphragm actuator and 4 inches of stem travel for proper operation.
The area of the actuator diaphragm is 80 square inches.
What is the approximate air pressure required for proper valve operation?
A. 10 psig
B. 25 psig
C. 40 psig
D. 55 psig
Show Answer
Answer: C
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