looking for hand pump leads

[redhand]

Hello,

I've been looking for a hand pump that will be suitable to use with a small RO membrane. So I need a low flow pump ~4L/m, that will give me 50-100psi. I've been looking but haven't had any luck searching online.
Any help would be appreciated.

Red

 

[BigInch]

Really high pressure service for a hand pump. They have too high of an elbow grease consumptioin rate to be in widespread use.

Only put off until tomorrow what you are willing to die having left undone. - Pablo Picasso

 

[PumpSmart]

RO pressure depends of fluid analisys and concentrations.
50-100 psi seems to be low.
Are you sure?
What is TDS?

 

[btrueblood]

A hydrostatic test pump might get you there, pressure wise. As Big suggests, it would take a bit of elbow grease to achieve 1 gpm with one. Realize that 1 gpm at 50 psig is about 23 Watts of power with no accounting for pump efficiency; typical human arms are good for about 100 Watts for a minute, and much less on a continuous basis. Leg power is better at some 750 watts continuous power. Maybe a gear pump and a bicycle frame...

 

[bimr]

The capacity is too large for continuously operating a hand pump.

Have you looked into marine ro units?

http://www.hrosystems.com/hro_web/hro_products/hro-seafari-v-spec.html