"Don S" > wrote in message
om...
> > I know that a hydraulic bladder press operates at about 30psi

I run my bladder press at about 3 Bar, which is closer to 50 PSI. You need
a hydraulic ram or a screw device with a _long_ handle to achieve that kind
of pressure over a large platen. A simple lever arrangement won't cut it.

> > if you
> > have a 10" diameter basket, that's about 78 sq in. Times 30, that's
> > over 2300 lbs of weight on a one-to-one lever system.

Correct.

> Are your sure about the calculation where you arrive at 2300
> pounds? Wouldn't I only have to think about the 30 psi and ensure
> I get that pressure on my round (or square) pressing plate?

Yes, but remember that psi = pounds per square inch. You have to multiply
the 30 by the number of square inches of plate.

Building something like this from scratch isn't easy or cheap. That's why I
suggested renting or buying a press. You could always sell it if you decide
winemaking isn't for you.

Tom S