Re: Power steering / engine oil pumps use for waste oil.

On May 25, 12:43 pm, "HLS" <nos...@xxxxxxxxxx> wrote:
"George" <georgewb...@xxxxxxxxxxx> wrote in message

news:bcb4b7d4-215e-4d99-. That

is a pity as I don't need a high flow and I didn't want to use a high
power electric motor, to get it up to that speed I will need at least
1 hp I reckon. I would still like to get the pulley off!

Sometimes it is better to filter using simple hydrostatic head if you have
the time to wait...

If you want to reduce the flow on your pump, install a partial bypass line,
from high pressure side to intake...Put a metering valve in that line and
you
can let the pump reach its operational speed, but you can still throttle the
fluid
such that you dont put too much pressure on the filter.

Goood idea!

Today I got my first 5 gallons or so filtered, but I was not very
happy with the process. Even though I found a smaller motor pulley,
it was going too fast and sucking air in via the filler cap. The
pressure across the filter was too high as well
and got up to about 60 psi. I think if I closed off the filler cap,
got an even smaller belt pulley to make it run even slower AND put in
your bypass, I will be in business.

Like I said earlier I do have an engine oil pump which is very small
and neat but has an awkward drive rod and no seals. I have machined
a groove in the drive shaft and inserted an O ring, which may do the
trick there and blocked up the pressure relief escape. I just have to
turn it in a satisfactory manner. With a slower motor and a bypass I
think this will be OK. Only one input and one output.

I shall put sealer on the faces of the two halves of the body as there
is no gasket and give it a whirl. What I have now is more or less
working, but all the bubbles being drawn in caused it to expand
rapidly when the motor stopped and it poured oil out of the filler cap
which does not seal at all. It made an awful mess.

Ideally I want a lower pressure, slower flow which I can leave on for
hours at a time as I am pumping from one 300 gallon tank to another,
i.e. from a pre-filtered and settled tank to a 3 micron filtered and
de-watered tank, prior to putting it in my truck.

Thanks for your comments, regards George.
.

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