On 2012-08-09, Lloyd E. Sponenburgh lloydspinsidemindspring.com wrote:
Ignoramus495 fired this volley in
:


I am generally a little apprehensive about this, when I think about
potential consequences of pinhole leaks, and such. I wanted to see if
anyone has experience with 10,000 PSI hydraulic systems.

The first thing to determine is whether or not that is a 10Kpsi cylinder.

7.5" o.d. could imply a 6" cylinder with extra heavy 3/4" walls, but I'd
confirm its ratings with a part number -- especially if it is designed
for high pressure, it's gotta be marked somewhere. It could also be a
7" cylinder, and with 1/4" walls, wouldn't likely be rated at 10Kpsi.

I will check it more closely tomorrow. I can only look at the cylinder
from the top, and my recollection is that the walls could easily be
3/4 inch.

High pressures aren't hard to manage safely. Hoses and fittings can be
covered with soft, tough absorbent material (like several wraps of
canvas, loosely applied) to prevent injection injuries in the event of a
pinhole leak. Adjustable pressure relief valves are the solution to
running at the lowest suitable pressure.

Good point.

But make sure, too, Ig, that the frame can take that sort of stress.
150T isn't all _that_ heavy of a press, but you must confirm the cross
sections and beam load capabilities of whatever steel was used to make
it, along with the tensile strength of the verticals.

Yes, I will try to do the math tomorrow. My personal hunch is that it
IS a 150 ton press. I will also post some pictures.

i