Sizing, Selecting, and Applying Process Control Valves (EI30) reviews the principles and applied mathematics that describe the characteristics and coefficients used in the sizing, selection and application of process control valves. Students will gain a practical understanding of control valves, actuators, positioners and accessories through a comprehensive look at the design and application of control valves as the final control element in a process control system.
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Classroom (EI30)Length: 3 days |
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Learning Objectives
- Compare various types of final control elements
- Identify the function of the control valve in a typical process control loop
- Identify specific areas where certain valves perform best
- Compare sliding stem and rotary style valves
- Compare spring opposed diaphragm and piston powered actuators
- Apply ANSI/ISA75 and IEC 60534 standards
- Size valves for incompressible and compressible applications.
- Specify various support hardware such as solenoids, hand wheels and transducers
- Make recommendations for safe and accessible design
Topics Covered
- Introduction
- Final control elements
- Loop components
- Terminology
- Valve types
- Globe
- Ball
- Plug
- Butterfly
- Specialty
- Actuators
- Spring opposed diaphragm
- Piston
- Vane
- Scotch-yoke
- Comparison
- Sliding stem
- Rotary
- Hydraulic
- Electrical
- Valve performance
- Gain
- Performance criteria
- Stroking time
- Flow characteristic
- Thrust
- Torque
- The six demons
- Erosion
- Corrosion
- Flashing
- Cavitation
- Velocity
- Noise
- Installation and maintenance
- Performance
- Safety
- Valve sizing
- Manual
- Limited computer support
- Specification
- Control valve specification document
- Specialty valves
- Available designs
- Applications in industry
Exercises
- Measurement calculation
- Sizing, selection and application of valves for liquid service
- Sizing, selection and application of valves for gas service
- Documentation identification