机构:
Instrumentation and Controls Dept., Ambitech Engineering Corp., United StatesInstrumentation and Controls Dept., Ambitech Engineering Corp., United States
Lofland, Eric
[1
]
机构:
[1] Instrumentation and Controls Dept., Ambitech Engineering Corp., United States
Valve specification begins with the control loop, which includes the transmitter that forwards signals to the computer, positioner and its actuator. The control valve assembly consists of the actuator that opens and closes the valve, positioner that converts electric signals to pneumatic signals, and valve that partially obstructs flow to control a process parameter.