A vertical safety valve has a compressed spring assembly that is applying 1,200 lbf to the top of the valve disk in opposition to system pressure.
System pressure is being exerted on the underside of the valve disk that is 3 inches in diameter.
Which one of the following is the approximate system pressure at which the safety valve will open?
A. 44 psig
B. 64 psig
C. 128 psig
D. 170 psig
Show Answer
Answer: D
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