Looking for the impossible??
Looking for the impossible??
(OP)
I am looking for a high pressure (2000 psi), low rate (1.5 litres/min) water (brackish, possible small solids content) pump which has an overall diameter of 65mm or less (length not important, but ideally 3 metres or less), to operate at 120 deg C. Had no luck so far, except for a positive displacement (piston) pump, but this can't handle any solids (5 micron max). I thought a PCP would be available, but they all seem to be too large in diameter, or have a low pressure capability. Alternatively, some form of transfer pump, where the pumped fluids are separate from the pump working fluid, might be OK. Any help/contacts appreciated.
Thanks,
Barry
Brisbane, Australia
Thanks,
Barry
Brisbane, Australia





RE: Looking for the impossible??
RE: Looking for the impossible??
RE: Looking for the impossible??
David
RE: Looking for the impossible??
And yeah, I could make one for you, but it would cost a fortune.
Charlie
www.facsco.com
RE: Looking for the impossible??
RE: Looking for the impossible??
Micalbrch - I will check out the links. I thought PCP would be best due to the use of these pumps for lifting water in deep wells, but they are large diameter. The piston diaphragm pumps look very interesting if I cen find one small enough.
Compositepro - correct, it is a downhole pump and yes, I do need that level of differential. The pump will be used to inflate a packer against the differential at depth, and to pump from a low pressure to a high pressure environment. Gear pumps I looked at could not handle water at the pressure, and the solids, as you mention, would be a problem. Plunger pump would be good, but you are right - finding a supplier is a problem.
zdas04 - Thanks, I will check that out and ask them.
FACS - Brackish does mean saline, but only around 5 to 10kppm. Send me technical details and a quote if you're serious about building a pump.
Regards,
Barry
RE: Looking for the impossible??
RE: Looking for the impossible??
Looks like the custom build is the only way to go, at this stage. I am currently using a special hydraulic pump designed for water, but this needs very clean fluid and has other issues too, because a) it can't take differential pressure across the seals. This is solved by immersing the whole pump in the tank and using a magnetic drive coupling; b) it stalls the motor if there is a high pressure on the inlet. This solved by using a one way valve between the tank and outlet, which shorts the pump until it gets up to pressure; c) it produces a high delta P when flow is reversed and the pump not turning. As I need the pump out of the way when this happens, solution was to design a special shuttle valve to short backflow to the tank.
Finally, this only gives 1500 psi at best...
To give a better idea of what I need, I attached a file showing the current arrangement. Top is the motor, then the magnetic coupling, then the pump.
RE: Looking for the impossible??
We are pumping just clean water as a triplex plunger pump is sensitive to solids and the temperature is an issue too. But at least flow and pressure will work for sure. If you can get a PTFE plunger packing and PTFE or FPM seals the temperature issue will be solved, too.
RE: Looking for the impossible??
RE: Looking for the impossible??
Nick
RE: Looking for the impossible??
length isn't a problem, but agree that what I want seems really difficult to achieve. I'm thinking if there are some other options available, as this seems to be in the "too difficult" box.