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Judul : How Direct Acting and Reverse Acting Control Valve Loops Work
link : How Direct Acting and Reverse Acting Control Valve Loops Work
How Direct Acting and Reverse Acting Control Valve Loops Work
A typical control valve loop consists of four basic elements for consideration:
(a) The process under control mainly flow or pressure applications
(b) The process controller that initiates control action to the control valve
(c) A valve positioner (almost always required in most applications)
(d) Control valve action. See How a typical Control Valve Loop Works
These basic elements work in coordination to produce the desired control outcome. Control valve loops can be operated in two basic modes :
(a) Direct acting loops
(b) Reverse acting loops
Direct Acting Control Valve Loops:
In a direct acting control valve loop shown below:
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