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Control Valve Sizing for Liquid Applications
251 students
What you'll learn
- Size and Select Control Valves For Liquid Applications
- Understand Valve Flow Coefficient (Cv), Flow Capacity at Different Pressure Drops, and Corrections for Viscosity and Specific Gravity for Control Valves
- Convert Valve Flow Coefficient (Cv) to Resistance Coefficient (K) for Control Valves
- Analyze Inherent Valve Characteristic Curves With Examples for Control Valves
- Differentiate Between Inherent Valve Characteristics and Installed Valve Characteristic Curves for Control Valves
- Assess Control Valve Authority and Its Impact on Pressure Drop and System Head Curves
- Evaluate the Relationship Between Control Valve Open Percentage and System Head Curves
- Analyze the Impact of Control Valve and Operational Parameters on System Head Curves in Pump Applications
- Understand Control Valve Rangeability, Turndown Ratio, and Their Impact on Control Valve Sizing With Examples
- Apply Control Valve Sizing Heuristics Effectively
- Learn Reasons for Common Control Valve Sizing Issues Like Cavitation and Flashing
- Learn and Apply Equations to Figure if Cavitation or Flashing Exists in Control Valves
- Work Through an Example to Check for Cavitation and Flashing in Control Valves
- Learn Additional Parameters for Selecting the Appropriate Control Valve
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Course content
6 sections • 24 lectures • 3h 26m total length
Requirements
- A basic understanding of the pump head equation, the ability to plot system head curves, and knowledge of adding resistances in series using resistance coefficients for common piping elements such as piping, elbows, and tees (See Course: Pipe Sizing & Modeling Piping Systems for Liquids).
Description
This course is also available as part of my engineering training library on chemengpro, where I share tools, templates, and bonus materials for engineers.
Chapter 1: Resistances in Series
Introduction to Resistances in Series
Pump Sizing Roadmap
Chapter 2: Valves
Flow Coefficient (Cv) for Control Valves
Cv Corrections for Viscosity and Specific Gravity for Control Valves
Cv and Flow Capacity at Different Pressure Drops for Control Valves
Converting Cv to Resistance Coefficient (K) for Control Valves
Inherent Valve Curve for Control Valves
Example of Inherent Valve Curve for Control Valves
Introduction to Valve Authority for Control Valves
Chapter 3: Valve Authority & Installed Characteristic Curve
Reviewing Valve Authority Definitions for Control Valves
Valve Authority vs System Head Plot
Inherent vs Installed Characteristic Curve for Control Valves
Example: Estimating Pump Curve, System Curve, Valve Authority, and Installed Valve Characteristic Curve at Different Valve Openings for Control Valves
Expressing Valve Open Percentage vs System Head Mathematically
Impact of Operating Parameters on System Head Curve
Chapter 4: Rangeability & Turndown
Valve Rangeability for Control Valves
Example of Valve Rangeability for Control Valves
Valve Turndown for Control Valves
Chapter 5: Rules of Thumb for Sizing a Valve
Key Rules of Thumb for Valve Sizing: Includes Heuristics for Different Valve Openings at Different Operating Flowrates, Liquid Velocity, and Recommended Control Valve Pressure Drop
Chapter 6: Challenges With Sizing Valves
Common Sizing Issues
Cavitation and Flashing: What Are They, Why Are They a Problem, and How to Check if They Are Present
Example of Checking for Cavitation and Flashing in a Control Valve
Chapter 7: Valve Selection Considerations
Valve Selection Considerations: Includes a High-Level Guide on the Typical Parameters Required for Selecting a Control Valve
Who this course is for:
- Engineers In-Training, Recent College graduates, Engineering Students
- Chemical, Process, Petroleum Engineers
- Piping, Plant Engineers
- Mechanical Engineers
- Design Engineers
- Maintenance Technicians
- Plant Operators
- Civil Engineers
- Safety Engineers