Print this page Pumps
Lawrence J. Marchetti, P.E.
Course Outline
This 3-hour course
utilizes US Department of Energy training materials (DOE-HDBK-1018/1-93, Mechanical
Science, Vol. 1, Module 3) to describe the purpose, construction, and principals
of operation for centrifugal and positive displacement pumps.
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:
- State
the purposes of the following centrifugal pump components:
a. Volute
b. Impeller
c. Diffuser
d. Packing
e. Lantern Ring
f. Wearing Ring - Given a drawing
of a centrifugal pump, identify the following:
a. Pump casing
b. Pump shaft
c. Impeller
d. Volute
e. Stuffing Box
f. Stuffing box gland
g. Packing
h. Lantern Ring
i. Impeller wearing ring
j. Pump casing wearing ring - Define
the following terms:
a. Net Positive Suction Head Available (NPSHA)
b. Cavitation
c. Gas binding
d. Shutoff Head
e. Pump Runout - State the relationship between net positive suction head available (NPSHA) and net positive suction head required (NPSHR) necessary to avoid cavitation.
- List three indications that a centrifugal pump may be cavitating.
- List five changes that can be made in a pump or its surrounding system that can reduce cavitation.
- List three effects of cavitation.
- Describe the shape of the characteristic curve for a centrifugal pump.
- Describe how centrifugal pumps are protected from the conditions of dead heading and pump runout.
- State the difference between the flow characteristics of centrifugal and positive displacement pumps.
- Given a simplified
drawing of a positive displacement pump, Classify the pump as one of
the following:
a. Reciprocation piston pump
b. Gear-type rotary pump
c. Screw-type rotary pump
d. Lobe-type rotary pump
e. Moving vane pump
f. Diaphragm pump - Explain the importance of viscosity as it relates to the operation of a reciprocating positive displacement pump.
- Describe the characteristic curve for a positive displacement pump.
- Define the term slippage.
- State
how positive displacement pumps are protected against over-pressurization.
In almost any nuclear, chemical, or mechanical system, fluid must be transported from one place to another. Centrifugal and positive displacement type pumps are used to transfer fluid from one place to another. A basic understanding of the theory, characteristics, and mechanical components of centrifugal and positive displacement pumps are essential to understanding how they function and operate.
The course content
is generic in nature. Specific information on a particular heat exchanger should
be obtained directly from the manufacturer.
Course
Content
The the course content is in a PDF file DOE-HDBK-1018/1-93, Mechanical Science, Vol. 1, Module 3. You are required to study Module-3.
Module-3 Pumps contains three (3) sections:
a. Centrifugal Pumps
b. Centrifugal Pump Operation
c. Positive Displacement Pumps
You need to open or download this document to study this course.
Course Summary
Pumps are utilized
as a primary means of fluid transport between two or more locations and are
employed in numerous applications including nuclear, chemical, and mechanical
systems and processes. Engineers involved in the application, and selection
of centrifugal and positive displacement pumps require a basic understanding
of pump theory, operational characteristics, and components. 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.pumps.com
www.pumpuniversity.com
www.bellgossett.com
Once
you finish studying the
above course content,
you need to
take a quiz
to obtain the PDH credits.
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.
