The basic function of the spring in a control valve is to
A. Characterize flow
B. Oppose the diaphragm so as to position the valve according to signal pressure
C. Close the valve if air failure occurs
D. Open the valve if air failure occurs
Answer:B
The basic function of the spring in a control valve is to
A. Characterize flow B. Oppose the diaphragm so as to position the valve according to signal pressure C. Close the valve if air failure occurs D. Open the valve if air failure occurs