Control Valves, Actuators & Positioners : Operation & Design

A practical approach to control valves , actuators and positioners using real-world process examples & solved problems

What you'll learn

Understand control valves working principles for successful operation of your plant and piping systems

Understand control valve construction details (bonnet, stem, disc, seat, packing, body, actuator, positioner…)

Identify and know the principles of operation of common control valve actuators (diaphragm, piston, rack and pinion, scotch yoke)

Dismantle and assemble various types of control valves and actuators using 3D and 2D models

Understand how single acting and double acting pneumatic actuators work through graphics and 3D animations

Know how to convert a single acting spring return actuator to a double acting actuator and vice versa

Understand the concept of failure mode in control valves : Fail Open "FO", Fail Closed "FC", Fail As Is "FAI"

Understand the concept of "Air-to-push-up" and Air-to-push-down"

Understand the concept of "direct-acting" and "reverse-acting"

Know how to convert a fail close actuator to a fail open actuator and vice versa

Understand the concept of valve flow coefficient "Cv" and familiarize yourself with the various units

Know how to determine flowrate and pressure drop through control valves for different valve lifts

Know how to match the valve characteristics to the process

Know how to construct the installation curve for a given control valve

Understand the effect of selecting a control valve larger than necessary

Understand the effect of differential pressure on the valve lift and actuator operation

Differentiate between fast opening, linear and equal percentage valve characteristics

Understand how valve positioners operate

Know the different types of valve positioners (P/P, I/P, force balance, motion balance, digital…)

Understand when a positioner should be fitted

Understand the working principles of I/P converters and how they are used in control valves

Put your knowledge to the test at the end of each section with a valuable technical quiz (190+ questions and solved problems)

Requirements

Some engineering or field knowledge is preferable but not mandatory. All the concepts are explained in depth using an easy to understand language to allow students to build their knowledge from the ground up

Description

This course is for engineers, valve mechanics, maintenance personnel, instrument technicians and other persons responsible for the selection, sizing, installation, commissioning, operation and maintenance of control valves, actuators and positioners.The course begins with a review of the role and function of control valves and actuators and offers a technical perspective for the working of positioners for control valve operation.You will find valuable insights into the working principles and construction details of the following equipment:control valves (sliding stem and rotary / fast opening, linear and equal percentage)mixing and diverting 3-port control valvesdiaphragm actuators (air-to-push-up and air-to-push-down)piston actuators (single acting and double acting / Fail Open (FO) and Fail Close (FC))rack and pinion actuators (single acting and double acting / Fail Open (FO) and Fail Close (FC))scotch yoke actuators (single acting and double acting / Fail Open (FO) and Fail Close (FC))pneumatic positioners (force balance, motion balance)digital positionersI/P convertersThe course then proceeds through a series of process examples and solved problems that require you to:dismantle and assemble various types of control valves and actuators using 3D and 2D modelsidentify the net effect of various control valve/actuator assemblies (direct acting, reverse acting, fail open, fail close…)convert an actuator from single acting to double acting configurationconvert a control valve/actuator assembly from a fail close to a fail open configurationconstruct the installation curve for a control valvedetermine flowrate and pressure drop through control valves for different valve liftsmatch the valve characteristics to the given applicationexamine the effect of selecting a control valve larger than necessaryexamine the effect of differential pressure on the valve lift and actuator operationdetermine when a positioner should be fitted…This will help you develop the necessary skills to ensure your process plant and piping systems run smoothly.The course also includes:extensive graphicscross-sectional views3D animationsThis will give you a virtual practical exposure on control valves, actuators and positioners.In addition, we have included at the end of the course a technical quiz (190+ questions) to help you test your knowledge and emphasize the key learning points.The quiz includes:True/False questionsMulti-choice questionsImages, cross-sectional viewsSolved problemsand much more…So when you think you’ve got a good grasp on a topic within the course, you can test your knowledge by taking the quiz. If you pass, wonderful ! If not, you can review the videos and notes again or ask us for help in the Q&A section.We promise you that even though this is a technical training, you can watch it easily, without pain, but with comprehension, and that after completing it, you won't be an experienced process control engineer or instrument technician but you will be prepared to become one if that is what you like and persist to be.Thank you again for your interest in our online courses. It is a privilege to serve you and make sure that you're learning valuable information with us.WR TrainingSpread the wings of your knowledge

Overview

Section 1: Control valve functions and basic parts

Lecture 1 Learning objectives

Lecture 2 Introduction

Lecture 3 Valve body

Lecture 4 Valve bonnet

Lecture 5 Trim

Lecture 6 Plug and seat

Lecture 7 Stem

Lecture 8 Actuator

Lecture 9 Packing

Lecture 10 Before you proceed to the next section

Section 2: Control valve configurations

Lecture 11 Control valves

Lecture 12 Trim arrangement

Lecture 13 Direction of action

Lecture 14 Control valve 3D dismantling

Lecture 15 Control valve 2D dismantling

Lecture 16 Before you proceed to the next section

Section 3: General considerations

Lecture 17 Introduction

Lecture 18 Two-port valves

Lecture 19 Shut-off tightness

Lecture 20 Balanced single seat

Lecture 21 Slide valves - Spindle operated

Lecture 22 Rotary valves

Lecture 23 Options

Lecture 24 Two-port valves summary

Lecture 25 Three-port valves

Lecture 26 Process examples of three-port valves

Lecture 27 Before you proceed to the next section

Section 4: Control valve capacity

Lecture 28 Introduction

Lecture 29 Valve flow coefficient Cv

Lecture 30 Use of flow coefficient Cv for piping and components

Lecture 31 Before you proceed to the next section

Section 5: Control valve characteristics

Lecture 32 Flow characteristics

Lecture 33 Fast opening

Lecture 34 Linear

Lecture 35 Equal percentage

Lecture 36 Example: Determining flowrate for different valve lifts

Lecture 37 Matching the valve characteristic to the process

Lecture 38 Example: A water circulating heating system

Lecture 39 Example: A boiler water level control system

Lecture 40 Example: Constructing the installation curve

Lecture 41 Example: Comparing linear and equal percentage

Lecture 42 Example: Temperature control of a steam application

Lecture 43 Example: The effect of selecting a control valve larger than necessary

Lecture 44 Before you proceed to the next section

Section 6: Control valve actuators and positioners for continuous control action

Lecture 45 Introduction

Lecture 46 Piston actuators

Lecture 47 Piston actuators (double acting) - 3D animation

Lecture 48 Piston actuators (single acting) - Dismantling

Lecture 49 Diaphragm actuators

Lecture 50 Actuator valve combinations

Lecture 51 Effect of differential pressure on the valve lift

Lecture 52 What are valve positioners ?

Lecture 53 Force balance positioners

Lecture 54 Motion balance positioners

Lecture 55 Example of positioners

Lecture 56 Positioners: What you should remember

Lecture 57 Positioners: When should a positioner be fitted

Lecture 58 P/P positioners

Lecture 59 I/P positioners

Lecture 60 About I/P converters

Lecture 61 Digital positioners

Lecture 62 Summary: Selecting a pneumatic valve and actuator

Lecture 63 Before you proceed to the next section

Section 7: Control valve actuators and position indicators for On/Off control action

Lecture 64 Pneumatic actuators

Lecture 65 Example 1 : Single acting / spring return actuators : Components & Operation

Lecture 66 Example 2 : Single acting / spring return actuators : Components & Operation

Lecture 67 Example 3 : Double acting actuators : Components & Operation

Lecture 68 Example 4 : Double acting actuators : Components & Operation

Lecture 69 From single acting to double acting actuator

Lecture 70 From Fail Close (FC) to Fail Open (FO) - Scotch Yoke actuators

Lecture 71 From Fail Close (FC) to Fail Open (FO) - Rack and Pinion Actuators

Lecture 72 Rack and Pinion vs Scotch Yoke

Lecture 73 Valve position indication

Lecture 74 Before you proceed to the next section

Section 8: Choices and selection

Lecture 75 What type of valves should be installed ?

Section 9: Installation and commissioning

Lecture 76 Control valves

Lecture 77 Actuators

Chemical / Process / Control Engineers,Design Engineers,Piping Engineers,Plant Engineers,Maintenance / Instrument Technicians,Mechanics,Plant Operators