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Pump Suction Characteristics
John
R. White, P.E.
Overview
This
1-hour online course describes the significance and importance of the
net positive suction head
(NPSH) in designing a pumping system, specifying a pump, and diagnosing pumping
problems. It is basic mechanical engineering, but truly understanding and
correctly applying knowledge such as this tends to slip away from us unless we
use it frequently. The tendency for engineers who grew up using computer
calculations may be to automatically use a commercial program to click out the
answers without fully understanding all of the implications and variations to a
particular problem. Also important is the ability to think through a problem
and be able to spot unreasonable answers that sometimes pop out of a computer
solution. The "intuition" that experienced engineers seem to possess comes from
thoroughly understanding a problem and different approaches to a solution.
Although this course is primarily intended for mechanical engineers, it should
be of interest to others, and written for their understanding.
The
student must take a multiple-choice quiz consisting of twenty (20) 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:
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Be familiar with pumping concepts, terminology, and pump selection.
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Understand the concept and application of NPSH, TDH, vapor pressure of a
liquid, velocity head, specific speed, and other terms.
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Understand the effects and significance of varying the temperature, specific
gravity, vapor pressure, viscosity,and elevation of a liquid on its ability to
be pumped.
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Be able to discuss specific speed with pump vendors and operating personnel.
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Be able to discuss cavitation, what may be causing it, and probable
consequences
Course
Click on the following PDF attachment and review the course "Pump
Suction Characteristics" prior to taking a quiz for credit.
Pump
Suction Characteristics (247 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.)
 
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Related Books
Centrifugal and Rotary Pumps: Fundamentals with Applications
Centrifugal Pump Design
Pump Application Desk Book
Pump Handbook
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