Fundamentals Of Industrial Instrumentation And Process Control

A control valve varies the flow rate of a fluid (steam, water, chemicals) entering or leaving the process.

Process control is the discipline that uses instrumentation to automatically adjust process conditions, keeping the process variable at a desired value known as the . Instead of having a human operator constantly turn valves on and off, a control system makes micro-adjustments thousands of times per second. A control valve varies the flow rate of