vertical very large 1 million gpm sea-water pumps
vertical very large 1 million gpm sea-water pumps
(OP)
i wanted to know of your experience of using/operating/maintaining vertical pumps in sea water service what flow and head, any new monitoring techniques to detect impending failure, the better known vendors, electric motor drivers, most effective metallurgy
thank you
thank you





RE: vertical very large 1 million gpm sea-water pumps
For instance, wet or dry pit arrangement, duty head, number of pumps,50/60 Hz power supply, inlet conditions, etc- this is just a few of the minor concerns.
It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)
RE: vertical very large 1 million gpm sea-water pumps
RE: vertical very large 1 million gpm sea-water pumps
The information you will find will include comparisons with modern vertical pumps, which are typically much smaller, but you will also find much help on material selection and operational problems, if you can read between the lines of early 20th century technical prose.
Mike Halloran
Pembroke Pines, FL, USA
RE: vertical very large 1 million gpm sea-water pumps
For materials, see link below. For pumps of this size, You're probably looking at 316SS for stationary castings and super duplex or equiv for internals. Catholic protection will be considered.
Vendors: All of the big names should have plenty of experience in this.
Techniques to detect failure: typical is standard vibration collection which does a poor job of detecting problems below the deck. Some have prox probes installed at stuffing box for continuous monitoring (should help detect worn shaft/bearings). Some have installed accelerometers at line shaft bearings (under water level) but I'm not sure how reliable or effective this has been. Consider making accommodations for flow rate measurements if sand/silt will wear the impeller.
The design of such large pumps and system may involve specialized piping (concrete?, pre-stressed?, cement-lined?), startup controls (pipe fill, closed discharge valve), and fluid flow considerations (water hammer, massive fluid energy, siphon/vacuum, anti-reverse-rotation, intake bays).
http://turbolab.tamu.edu/proc/pumpproc/P26/ch09_Mo...
RE: vertical very large 1 million gpm sea-water pumps
RE: vertical very large 1 million gpm sea-water pumps
Best to you,
Goober Dave
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RE: vertical very large 1 million gpm sea-water pumps
RE: vertical very large 1 million gpm sea-water pumps
Mike Halloran
Pembroke Pines, FL, USA
RE: vertical very large 1 million gpm sea-water pumps
It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)
RE: vertical very large 1 million gpm sea-water pumps
Sorry for the thread derail.
RE: vertical very large 1 million gpm sea-water pumps
It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)