Tuesday, August 25, 2015

Basic Operation and Function of Control Valves

control valve basics
Control Valve (Cashco)



Control valves are an integral part of many process control loops. Understanding their basic operation is important for any process control professional. Here is an excellent document outlining the control valve operation, the major components, and terminology used.




This document covers:
  • Terminology
  • Control Valve Basic Designs
  • Characterization and Trim Design
  • Control Valve Technical Considerations
  • Force-Balance Principle
  • Actuator Basic Designs
  • Control Valve Unit Action
  • Actuator Benchset Range
  • Valve Positioner Basics
  • Control Loop Action
  • Control Valve Packing Designs
  • Seat Leakage