"Don S" > wrote in message
om...
> >
> > Yes, but remember that psi = pounds per square inch. You have to
multiply
>
> So the options are to increase the leverage or decrease the
> size of the plate (platen?). In order to get the same volume
> in the press you could switch from a 24" diameter tube that
> is 2' high to a 12" tube 4' high.

You didn't work the numbers on that. Halving the diameter and doubling the
length yields a volume that is _half_ what you started with. Using your
example, you'd have to increase the height to 8' to retain the same volume.

Tom S