High pressure hydraulic tools are designed to be operated up to 700 bar [10,000 psi] hydraulic pressure. Most fluid power systems operate at 210 bar [3,000 psi]; with some going up to 350 bar [5,000 psi].
The hydraulic pressure is the pressure that builds up inside the equipment (jacks, pumps, cylinders, hoses). Any components connected to a high pressure pump must also be rated to withstand 700 bar [10,000 psi] because the entire system becomes pressurized to 700 bar [10,000 psi].
The safe operation of high pressure hydraulic tools requires that the person using them has been trained in their operation and that each tool has been properly serviced and looked after.