A question for the slippery handed pro's
So we have a hydraulic press (actually it's a tension test rig). It consists of a single acting 'enerpac' style ram and a two pump (low/hi pressure), 1HP power pack.
What we want to do is to have some finer control over the force we apply. By finer control I mean, the 10000 PSI system can generate about 20T. We would like to be able to ramp this up a couple of percent or so at a time.
It doesn't need to be calibrated or repeatable, we have a load cell in the system for that, we just want a knob we can twiddle to adjust the force..
Is the best way to do this with some kind of PRV, a regulator, or just a fine adjusted pressure switch for the motor?
Many thanks in advance.