more pics @ greer hydraulics inc.
you can operate this pump unit from about 500 psi up to 4500 psi.
the GPM. at low pressure isn't much more than the 6 GPM from what I could find out
HYDRAULIC POWER SUPPLY 12.5 HP. ELECTRIC MOTOR 220/440volts
DRIVEN PUMP DENNISON PV05XW-006-3WR-06Y 6 GPM. AT 3000PSI.-4 GPM. AT 4500 PSI. 10 GALLON RESIVIOR OIL TYPE 5606
call for more info