pump selection for irrigation system

[akoeppel]

I need help selecting a pump for a unique and demanding irrigation application. Here are the requirements:

-> 1-4 litres per minute (0.25-1 gpm)
-> 6-7m of head (19-23ft)
-> 6-24V DC solar powered
-> high efficiency
-> 20,000hrs or greater mean time between failure
-> low maintenance requirements

Submerged pumps are fine, suction pumps are fine, centrifugal, positive displacement, etc. are all fine, I just need something that can meet these requirements. If the pump is a suction pump or positive displacement, the head requirement can be reduced, but it will be lifting the water instead.

Thanks for your help.

 

[BigInch]

try here,

http://grundfos.dk/web/grfosweb.nsf/Webopslag/irrigation

http://virtualpipeline.spaces.msn.com

 

[akoeppel]

Thanks, but those are a bit higher flow that I was hoping. And defintiely outside my price range. I was previously planning on using the Laing DDC2 pump:

http://www.lainginc.com/DDC-2.htm

but it has been discontinued and the replacement pump (DDC3.2) does not have sufficient head. Short of running two DDC3.2 in series and doubling the cost, I am out of options.

 

[BigInch]

Did you see this model?

http://www.scsolar.com/PDF_Files/SC Solar_SQFlex pump chart.pdf

http://www.scsolar.com/Grundfos_Solar_Pumps.html

http://virtualpipeline.spaces.msn.com

 

[EdStainless]

Laing make good stuff, look around their site they make a lot of different pumps. Also try Eheim.
That is a lot of head. I don't know where to go for a PD that is that small and doesn't cost a fortune.


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