Peri-pumps can pump crazy high, but their flowrate is crazy low... What you need is a pump with say ~3m of maximum head pressure. That'll prolly be around 1200LPH pumps. A maxijet 1200 would work well for this application.
The "equation" you're thinking of is generally refferred to as the "pump curve". Which usually has Head Pressure on its Y axis and Flowrate on its X axis. In all cases, as head pressure (height water pushed up) increases, flowrate decreases. Most affordable centrifugal pump curves are relatively linear, although some are more logrithmic. All pumps have a maximum or "shutoff" head pressure, a value for which they will not pump higher. Below the shutoff head pressure, increasing tube diameter will actually lower head pressure and allow it to pump water faster. There is a point of diminishing returns in this (largely depending on length) but generally if you use tubing the same size as the pump fittings, you'll be good.
Edit: Andy, I'd love one of the boards, but something tells me the equivalent parts that I find here in the States won't be of the same form factor and prolly won't fit
. Thanks so much for the offer, but it'd prolly be wasted on me. I'll just use a through-hole tab board and do the traces with wiring underneath. Won't be as clean but it'll work . Mercifully the current isn't that big here, so I can prolly get away with this.
The "equation" you're thinking of is generally refferred to as the "pump curve". Which usually has Head Pressure on its Y axis and Flowrate on its X axis. In all cases, as head pressure (height water pushed up) increases, flowrate decreases. Most affordable centrifugal pump curves are relatively linear, although some are more logrithmic. All pumps have a maximum or "shutoff" head pressure, a value for which they will not pump higher. Below the shutoff head pressure, increasing tube diameter will actually lower head pressure and allow it to pump water faster. There is a point of diminishing returns in this (largely depending on length) but generally if you use tubing the same size as the pump fittings, you'll be good.
Edit: Andy, I'd love one of the boards, but something tells me the equivalent parts that I find here in the States won't be of the same form factor and prolly won't fit
. Thanks so much for the offer, but it'd prolly be wasted on me. I'll just use a through-hole tab board and do the traces with wiring underneath. Won't be as clean but it'll work . Mercifully the current isn't that big here, so I can prolly get away with this.
My measurement estimates may have proven to be a bit excessive! The height is actually 1.5m so as Ski said, a Maxiject 1200 which has a head height of 1.7m should be fine (and they are not badly priced!)
