|
Pumps
J.
Edward Hardin, P.E.
Overview
This 3-hour audio online
course covers key features, operating ranges and problem areas of centrifugal
and positive displacement pumps. The discussion on centrifugal pumps
covers impeller types, capacity ranges, material selection, and suitable
operating conditions. Problem areas are discussed, such as cavitation, low
flow, vapor bind, reverse rotation and high flow. The course author, who
has over 40 years of experience designing and troubleshooting pumping systems,
provides anecdotal advise on recognizing symptoms of pump problems in the field.
Positive displacement pumps
are discussed, including reciprocating, gear, diaphragm and progressive cavity
pumps. Additionally, considerable attention is paid to hose-type pumps,
which are not well known and certainly are not widely covered in traditional
pump selection resource guides. Typical applications for positive
displacement pumps are covered, as well as problems specific to each type of
pump.
The course also discusses pump
drivers, including electric motors, turbines, diesel engines and air-operated
pumps. Prevention of motor overload and applications for variable speed
motors are discussed. Finally, piping suction and discharge piping
problems are discussed. Methods are discussed to reduce the potential for
entry of vapor into the pump suction. Parallel and series pump
configurations are also covered.
The student must take a
multiple-choice quiz consisting of fifteen (15) questions at the end of
this course to obtain PDH credits.
Specific Knowledge or Skill Attained
This course teaches the following specific knowledge and
skills:
-
Impeller types used
in centrifugal pumps and their impact on pump performance
-
Centrifugal pump
construction and its impact on mechanical seals and braided packing
-
Diagnosing reverse
flow conditions in centrifugal and positive displacement pumps
-
Prevention of
cavitation and vapor binding
-
The impact of low
flow on a pump and measures to ensure minimum flow
-
Use of variable
speed motors to drive pumps
-
Low discharge
pressure and the potential for motor overload
-
Characteristics and
applications for diaphragm, gear, progressive cavity and hose-type pumps
-
Problems associated
with parallel and series pumping arrangements
-
Piping "fixes" to
cure NPSH problems
Course
Click on the links
below to hear the audio for the course "Pumps" prior to taking the quiz for PDH
credit.
Audio
Pumps - Tape 1, Side 1 (40.3 MB)
Pumps - Tape 1, Side 2 (35.0 MB)
Pumps - Tape 2, Side 1 (35.7 MB)
Pumps - Tape 2, Side 2 (24.9 MB)
Text-based
In lieu of listening
to the audio version, you can download a PDF of the transcript for this course
below.
Also, audio users may
want to refer to the course transcript when answering the quiz questions.
Pumps - Transcript of Audio Course (118 KB)
To obtain PDH credits for this course, you will need to take a quiz for
credit. Click on the link below.
(To take the quiz,
your web browser must be set to accept cookies. See how to
check your cookie settings.)
|
