A diaphragm actuator has a diaphragm area of 50 square inches and is adjusted to stroke a valve when a 3 to 15 psi (20 to 100 k Pa) Signal is applied. If the signal is 15 psi (100 k pa) the force on the valve stem will be :
A. 750 pounds
B. 750 pounds less than the opposing spring force
C. Dependent on hysteresis
D. None of the above
Answer:B
A diaphragm actuator has a diaphragm area of 50 square inches and is adjusted to stroke a valve when a 3 to 15 psi (20 to 100 k Pa) Signal is applied. If the signal is 15 psi (100 k pa) the force on the valve stem will be :
A. 750 pounds B. 750 pounds less than the opposing spring force C. Dependent on hysteresis D. None of the above