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High Flow Low Head Saltwater Pump

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PacificSteve

Mechanical
Joined
Dec 22, 2001
Messages
84
Location
US
OK experts, here is a challenging one.

I need to pump 1200GPM at 20 TDH saltwater at 70F, on a continuous basis.

I am leaning towards a 316SS or Fiberglass type pump (at least until I hear from the pros).

Main question -- can anyone hone me in a mnaufacturer that is likely to make a suitable pump with good efficiency (say 78% or better) in the expected range.

Pump has to lift 2 to 4 feet depending on tide. Source is a salt water well, so water is pretty clear. I don't want to use any checkvalves, and it does run continiously, so once primed, it should be good to go.

Thanks to y'all, from Hawaii, PacificSteve
 
Don't know why you are asking for such a high efficiency.
My first approach would have been a centrifugal pump with ejector priming but of course the efficiency is not exacly 78%. On the other hand it is something easily available and reliable and has a long service life.
lauri
 
Economics is the drving force on efficiency
We pay around $.20 per kWH at this site, one of the highest in the country.

Just as example, if this is a 20HP pump, it would cost roughly $20,000 per year to run. Over 20 years, a 10% better pumping efficiency results in a $40,000 cost savings.

Its worth making a good selection

PacificSteve
 
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