Process Control Valves and Actuators

• Comprehend valve operation
• Understand and appreciate assorted common valve types
• Size and select the correct valve set (including actuators), suited to each specific application
• Choose suitable positioners, based on prevailing conditions
• Use multiple techniques to tune a valve-controlled process

COURSE CONTENT

Introduction and Theory

• Control valve purpose and principles
• Flow conditions and pressure drops inside a valve
• Control valve and actuator signals
• Types of flow, Reynold numbers, vortices, gas vs liquid flow, Cv, Choked flow, etc.
• Cavitation and flashing
• Valve classification, associated hardware and an introduction to valve types

Valve Specifics, Characteristics and Sizing

• Continuation of valve types
• Valve selection and valves in P&IDs
• Valve leakage
• Valve characteristics (including equal percentage, linear, etc.)
• The relationship between inherent versus installed characteristics
• Calculations pertaining to valve sizing for a liquid application

Actuators, Positioners, Trims, Maintenance and Safety

• Valve sizing, using software
• Actuators, and the choices available
• Valve positioners
• Cavitation and noise control
• Valve installation and maintenance
• Pressure relief and SIS valves

Process Control Using Control Valves

• Introduction to process control
• The PID controller
• Open-loop tuning
• Closed-loop tuning
• Trial & error tuning (open and closed loop)

Optimum Control, Using Control Valves

• Valves in cascade loops
• Valves in ratio loops
• Valves in non-linear loops
• Valves in loops with long time delays
• Valves used in conjunction with PLCs
• New innovations in control valve technology

FOR WHOM:

Works, Services and Maintenance Personnel

TRAINING METHODOLOGY

The training methodology combines lectures, discussions, group exercises and illustrations. Participants will gain both theoretical and practical knowledge of the topics. The emphasis is on the practical application of the topics and as a result participant will go back to the workplace with both the ability and the confidence to apply the techniques learned to their duties.