IN08
Course Contents
Module 1: Final Control Element Fundamentals and Valve Types
- Role of final control elements in automated process loops
- Linear valves: globe, gate and diaphragm designs and characteristics
- Rotary valves: ball, butterfly and plug configurations and applications
- Valve trim types: balanced, unbalanced, cage-guided and contoured plugs
- Material selection criteria for bodies, trims, seals and packing systems
- International standards governing valve face-to-face dimensions and testing
- End connections, pressure ratings and temperature limitations
Module 2: Control Valve Sizing, Characteristics and Selection
- Understanding flow coefficient concepts (Cv and Kv values)
- Sizing equations for liquids, gases, steam and two-phase flows
- Inherent and installed flow characteristics: linear, equal percentage and quick opening
- Rangeability, turndown and controllable operating range limits
- Oversizing, undersizing and valve authority effects on loop stability
- Choked flow, critical pressure ratios and velocity limits
- Selecting the optimal valve size, trim type and characteristic profile
Module 3: Actuators, Positioners and Valve Accessories
- Pneumatic, hydraulic and electric actuator types and comparison
- Actuator thrust, torque and safety-factor sizing requirements
- Spring-return, double-acting and fail-safe hardware arrangements
- Positioners, I/P converters, volume boosters and solenoid valves
- Air supply quality, sizing limitations and response-time effects
- Digital valve controllers, smart positioners and setups
- Partial-stroke testing setups and emergency shutdown valve interfaces
Module 4: Severe Service, Reliability and Troubleshooting
- Cavitation, flashing, erosion and mechanical vibration mechanisms
- Aerodynamic and hydrodynamic noise control strategies
- Multistage, anti-cavitation and low-noise trim configurations
- High-pressure, high-temperature and corrosive chemical services
- Mechanical issues: stiction, deadband, hysteresis and packing friction
- Leakage classes, seat damage indicators and fugitive emissions controls
- Safe field inspection, overhaul procedures and post-maintenance testing
Module 5: Diagnostics and Final Control Element Optimisation
- Interpreting valve signature, travel charts and friction diagnostics
- Control loop interaction and positioner tuning principles
- Installed gain tracking and control response optimization
- Detecting poor valve performance from historical process trends
- Condition monitoring methods and predictive maintenance planning
- Root cause analysis methodologies for recurring valve assembly failures
- Performance KPIs and continuous improvement plans for final elements
