A diaphragm actuator has a diaphragm area of 115 square inches. A valve positioner is attached to the actuator and fed with 22 psi air supply. If after 9 psi signal is received from the controller the signal changes to 10 psi and the valve fails to move. What is the force applied to the valve stem?
A. 2.530 pounds
B. 1.495 pounds
C. 1.035 pounds
D. None of the above
Answer:A
A diaphragm actuator has a diaphragm area of 115 square inches. A valve positioner is attached to the actuator and fed with 22 psi air supply. If after 9 psi signal is received from the controller the signal changes to 10 psi and the valve fails to move. What is the force applied to the valve stem?
A. 2.530 pounds B. 1.495 pounds C. 1.035 pounds D. None of the above