High Flow Low Head Saltwater Pump

[PacificSteve]

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

 

[lauri]

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

 

[PacificSteve]

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