Brushless water pump

RalphVa · Sep 9, 2019

I'm looking for a 12v brushless water pump that'll do around 5 gpm and put up about 60 psi, typical of ones you guys would use for sprayers on your tractor 3 ph.

Cannot seem to find a source.

I'd like it to pump out of a little stream up to my rain tanks. I've some diaphragm pumps with brush motors that work but don't last very long on a battery charge. Brushless should go much longer.

Thanks.

Ralph

RNeumann · Sep 9, 2019

This is where I started.

RV | Enjoying Water | Residential Solutions | Industry Solutions | Pentair

RalphVa · Sep 11, 2019

Not much help. Went on Agri Supply and Northern Tools sites and contacted them. No reply yet.

Ralph

oosik · Sep 11, 2019

My neighbor has two remote cow watering stations. They both have 12V, solar powered pumps. I think they are "Red Jacket" by brand. Simple float controlled operation. Lift is 15 feet or less. He had to put the float controls inside a 18" diameter vertical pipe to keep the cows from "jamming the works".

Otherwise - they operate from spring thru fall. I know the local deer & elk sure appreciate these watering stations also.

Around here a watering station is every bit as good as a food plot.

EddieWalker · Sep 11, 2019

I have a Shurflo pump for my sprayer that's worked great, but I only use it a couple days in the Spring, and a couple days in the Fall. The rest of the year, it sits outside with my sprayer tank. It's not what you are looking for, but it has been a good pump and maybe a starting point for something bigger that you are wanting?

https://www.amazon.com/Shurflo-2088...1YFSZGMP4W3&psc=1&refRID=5V6QBBGAV1YFSZGMP4W3

RalphVa · Sep 12, 2019

Finally just ordered one off Amazon, as we had some points there. Cannot find brushless pumps except for aquarium ones.

Strangely enough, on any pump where it tells the operating amps, they're lower than what one would calculate for the pump flow & head and even 100% efficiency on the combined motor and pump. Diaphragm should be the most efficient. I calculate 12 amps for a 3 gpm/60 psi pump on 12v at 95% efficiency. Think I need to buy a backup marine battery to match what we have on our gate to get much running time (e.g. higher amp-hour). Don't think the little utility battery will last very long and be worth my time connecting it and all. The 3 gpm will fill my tanks in about 6 hours; so, a 72 amp hour battery is needed.

Ralph

Industrial Toys · Sep 12, 2019

Could have gone with a 110 volt pump and an inverter, even though I must say, I don't like inverters. Possibly any inefficiencies in the inverter might be made up by less circuit resistance to the pump, depending on layout.

Also, I have considered taking a high quality gear pump, or other style and then joining it to the DC motor of my choice. 12 volt pumps have always been stupid expensive and not of high quality either.

RNeumann · Sep 12, 2019

If you are running the pump off a battery and don’t have an automatic low voltage (say 11.5 volts or so) kill switch that would explain the short pump life. You will smoke the thing in no time at low voltage.

RalphVa · Sep 12, 2019

Didn't know there was such a thing. Will look into it.

Figured out why their quoted amps are lower than what I calculate. Gotta be using about 14 volts. Yeah, as voltage drops, the amperage would go up to maintain the same pump flow/head. Think what happens is the motor slows down though.

Ralph