Valves

Lawrence J. Marchetti, P.E.

Course Outline

This 4-hour course utilizes US Department of Energy training materials (DOE-HDBK-1018/1-93, Mechanical Science, Vol. 2, Module 4) to describe the application, construction, and principals of operation for various types of valves and actuators.

This course includes a True-False quiz at the end, which is designed to enhance the understanding of the course materials.

Learning Objective

At the conclusion of this course, the student will:

• Describe the four basic types of flow control elements employed in valve design.
• Describe how valve stem leakage is controlled.
• Given a drawing of a valve, identify the following:
  a. Body
  b. Bonnet
  c. Stem
  d. Actuator
  e. Seat
  f. Disk
  g. Packing
• Given a drawing of a valve, identify each of the following types of valves:
  a. Globe
  b. Gate
  c. Plug
  d. Ball
  e. Needle
  f. Butterfly
  g. Diaphragm
  h. Pinch
  i. Check
  j. Stop-Check
  k. Safety/Relief
  l. Reducing
• Describe the application of the following types of valves:
  a. Globe
  b. Gate
  c. Plug
  d. Ball
  e. Needle
  f. Butterfly
  g. Diaphragm
  h. Pinch
  i. Check
  j. Safety/Relief
  k. Reducing
• Describe the construction and principal of operation for the follwing types of valve actuators:
  a. Manual
  b. Electric motor
  c. Pneumatic
  d. Hydraulic
  e. Solenoid
  
  

Course Introduction

In almost any nuclear, chemical, or mechanical system, the flow of fluid and pressure through a piping system or process must be controlled . A valve is a mechanical device to accomplish this task. Valves start and stop fluid flow, throttle fluid flow, control the direction of fluid flow, regulate downstream system or process pressure, or relieve component or piping over pressurization. A basic understanding of the theory, characteristics, and mechanical components of valves and actuators are essential to understanding how they function and operate within a system or process.

Course Content

The the course content is in a PDF file DOE-HDBK-1018/1-93, Mechanical Science, Vol. 2, Module 4. You are required to study Module-4.

Module-4 Valves contains three (3) sections:

a. Valve functions and basic parts
b. Types of valves
c. Valve actuators

You need to open or download this document to study this course.

Course Summary

Valves are utilized as a primary means of controlling fluid flow and/or pressures in various systems and processes and find applications in nuclear, chemical, and mechanical systems. Engineers involved in the application, and selection of valves and actuators require a basic understanding of the application, operational characteristics, and components of various types of valves. The following course will provide the fundamental framework for this knowledge.


Related Reading

For additional technical information related to this subject, please visit the following websites or web pages:

www.nibco.com
www.cranevalve.com
www.dezurik.com
www.tycovalve.com
www.velan.com



Once you finish studying the above course content, you need to take a quiz to obtain the PDH credits.

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DISCLAIMER: The materials contained in the online course are not intended as a representation or warranty on the part of PDHonline.com or any other person/organization named herein. The materials are for general information only. They are not a substitute for competent professional advice. Application of this information to a specific project should be reviewed by a registered professional engineer. Anyone making use of the information set forth herein does so at their own risk and assumes any and all resulting liability arising therefrom.

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