27. Telltale symptoms of cavitation
Remember: Under the right conditions,
any pump can cavitate.
It can happen on the suction side
or on the discharge side.
This includes flooded-suction and submersible pumps!
51. How much safety factor is enough?
Rules vary (though some
regulations require up to 6'
of safety factor)
The deepest hurricane low
ever recorded in the Atlantic
basin was Hurricane Wilma
(2005), with a central low
pressure of 882 mb, or 29.55'
That departure is less than
4.5' below standard
atmospheric pressure (34') at
52. High vs. low elevations: Different calculations
Higher elevations mean less atmosphere above you
53. High vs. low elevations: Different calculations
Less atmosphere above means less available "push"
54. High vs. low elevations: Different calculations
Liquids boil at lower temps because vapor pressures at
lower temperatures overcome atmospheric pressure
113. To recap
Cavitation is a hydraulic matter
It is systemic -- you have to address the system to fix it
Other issues cause similar problems and damage
The issues may overlap
Cavitation won't go away just by hoping
Hydraulic problems can happen to any centrifugal pump
Submersible, flooded-suction, and suction lift alike
Hydraulic problems are system problems
Fix the system or the problem will remain
115. Thank you for your attention!
Contact us anytime with
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Gasoline vapor pressure data:
Hurricane low pressure record:
Willis Tower Skydeck elevation:
Photos of corroded impeller was submitted to our office for
troubleshooting assistance; client to remain nameless out of courtesy
Photo of diver taken from the public domain:
All other photos are original work by and copyright reserved to Brian