215-01 Introduction to Valves and Their Components

When you complete this lesson, you will be able to explain the basic design and function of valves, major valve components, and flow control elements.

• Discuss the overall purposes served by valves in a system or process
• Illustrate various valve types and highlight their differences
• Explain how valve stem leakage is controlled
• Describe the operation of root and throttle valves
• Identify the following valve components:
  • Body
  • Bonnet
  • Stem
  • Actuator
  • Packing
  • Seat
  • Disk
• Identify common valve markings and their meanings

215-02 Valve Actuators

When you complete this lesson, you will be able to discuss the use, selection, and design of various actuators, from simple manual hand-wheels to relatively complex electrical and hydraulic manipulators.

• Describe the construction and principle of operation for the following types of valve actuators:
  • Manual
  • Electric motor
  • Pneumatic
  • Hydraulic
  • Solenoid
• Identify several types of valve position indicators

215-03 Gate Valves

When you complete this lesson, you will be able to explain the use, selection, and design of a gate valve. You will also be able to describe how different service conditions affect gate valve configuration.

• Describe the operation of a gate valve
• Discuss some advantages and disadvantages of a gate valve
• List various gate valve disk configurations and identify the conditions under which they are used
• Describe different gate valve stem and valve seat designs

215-04 Globe Valves

When you complete this lesson, you will be able to describe the use, selection, and design of globe valves.

• Explain the operation of a globe valve
• Describe the three primary body designs
• Describe the three basic disk designs used in globe valves
• Discuss the advantages and disadvantages of these designs
• Explain how the disk and stems are attached in globe valves
• Describe seating arrangements and direction of flow through globe valves

215-05 Butterfly Valves

When you complete this lesson, you will be able to explain the use, selection, and design of typical butterfly valves found in industrial applications.

• Describe the operation of a butterfly valve
• Compare the butterfly valve to other valve types, and list its advantages
• Describe the seat and body construction of a typical butterfly valve
• Explain the types of disk and stem assemblies available on a butterfly valve

215-06 Ball Valves

When you complete this lesson, you will be able to explain the use, selection, and design of ball valves found in industrial applications.

• Describe the operation of a ball valve
• Identify the ball valve’s advantages and disadvantages
• List the four common ball valve port designs
• List the four general ball valve body styles
• Explain the significance of valve handle positions on a ball valve

215-07 Check Valves

When you complete this lesson, you will be able to explain the use, selection, and design of check valves found in industrial applications.

• Discuss the operation of check valves
• Describe the construction of each of the following types of check valves:
  • Swing
  • Tilting disk
  • Lift
  • Piston
  • Butterfly
  • Stop

215-08 Needle Valves

When you complete this lesson, you will be able to describe the use, selection, and design of a needle valve.

• Explain the operation of a needle valve
• Describe the construction of a needle valve
• Describe a needle valve’s body design and discuss how it contributes to its function

215-09 Plug Valves

When you complete this lesson, you will be able to describe the use, selection, and design of plug valves commonly found in industrial settings.

• Describe the operation of a plug valve and identify its advantages
• List the types of plug valve port designs available
• Identify the advantages and disadvantages of multi-port plug valves
• Discuss the use of lubricated and non-lubricated plug valve design
• Explain proper care of a plug valve gland

215-10 Diaphragm Valves

When you complete this lesson, you will be able to describe the use, selection, and design of the two basic types of diaphragm valves.

• Discuss the operation of a diaphragm valve
• Describe the construction of the diaphragm
• Explain the uses of different diaphragm valve stem assemblies
• Describe the diaphragm valve’s bonnet assembly

215-11 Pinch Valves

When you complete this lesson, you will be able to describe the use, selection, and design of pinch valves.

• Discuss the operation of pinch valves
• Explain how a pinch valve’s construction facilitates its function
• Identify applications where pinch valves operate most effectively

215-12 Safety and Relief Valves

When you complete this lesson, you will be able to describe the use, selection, and design of safety valves and relief valves.

• Describe the major difference between safety valves and relief valves
• Explain the principle of operation behind a safety valve
• Explain the principle of operation behind a pilot operated safety valve
• Explain the principle of operation behind a relief valve
• Describe the use of a pilot operated relief valve

215-13 Solenoid Valves

When you complete this lesson, you will be able to describe the overall design and function of various solenoid valves.

• Explain the basic principle behind the operation of a solenoid
• Identify the components of a solenoid valve
• Describe solenoid valve operation
• Compare tape-wrapped and encapsulated coil designs
• Define the terms “normally open” and “normally closed” as they relate to solenoid valves
• Explain the difference between two-way and three-way solenoid valves

215-14 Valve Positioners

When you complete this lesson, you will be able to describe the basic design and function of common types of valve positioners used in industrial facilities.

• Identify common tasks that might prompt the use of valve positioners
• Describe various types of positioners
• Compare basic operation of the three categories of digital positioners
• Explain how a pneumatic positioner works
• Describe the operation of an electro-pneumatic positioner

215-15 Pressure Regulator Valves

When you complete this lesson, you will be able to describe the basic design and function of common types of pressure regulating valves used in industrial facilities.

• Identify basic characteristics of pressure regulating valves
• Describe the basic operation of self-operating/pilot valves
• Describe the basic operation of direct control valves
• Describe the basic operation of fluid pressure regulating valves