high volume very low head pump

[dcasto]

I'm looking for a 50 gpm 1 to 2 feet head water pump. I was hoping to find a screw type to power in a ditch and raise the water up to a new ditch that I could use with a small solar panel. Once i find the pump, the conversion to solar is not a problem.

 

[Pumpsonly]

A wonderful invention making use of the water hammer / surge pressure to charge up the cylinder.

 

[btrueblood]

"ram IMO refers to some precompression going on, as would a ramjet engine"

Well, it is kinda like a ramjet, in using the incoming velocity head to create pressure. Only different. Surge pump would be a fine term to, if it didn't remind me of milking machines. Water hammer pump would be a good description, but would likely scare people.

Mike, I do agree that some kind of weir and flume would need to be provided for the irrigation scheme, and a bigger question is how large the pump would need to be to provide 50 gpm.

 

[MikeHalloran]

My concern would be that with a ram pump, in order to send 50 gpm up, you need to send 500 gpm down. No 'down' was mentioned in the OP.


IMHO, still, something like a small scale model of a Wood Screw Pump would be a decent choice for this application. ... except that I'd put the screw in the low leg of the syphon, not in the crest, so you wouldn't need a vacuum prime to get started.



Mike Halloran
Pembroke Pines, FL, USA

 

[BigInch]

The great advantage in both capital and operating cost is that you need no outside power source.... even if volumetric efficiency might be only 1 in 10, probably dependent on the ratio of lift head required to velocity head available. If that's all the water and the head that you need, a ram or "impulse pump" is no brainer.

Let your acquaintances be many, but your advisors one in a thousand’ ... Book of Ecclesiasticus