I don’t know what kind of Hydraulic Press you have purchased so
don’t know if my answer will be of any help to you.
I have a hydraulic Press made following the directions given by
Susan Kingsley in her book (P.77). I use a regular 20 ton automotive
bottle jack. I do not use compressed air to operate it, but pump it
up manually. At the time I had it made, this seemed more feasible for
my needs, and eliminated the need for a special air compressor. See
P. 19 of the Kingsley book for a full description of the bottle jack.
I have a pressure gauge on mine, it, but have learned through
experience when to stop raising the platen. The first few times, I
overshot and cut through the metal removing the flange. This is fine
when I do not want a flange, but not good when I want one… Now I can
tell by feel how much pressure it takes to form the piece and when to
Hope this is helpful.