Hydac FPU Charging and Testing Unit

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HYDAC FPU charging and testing unit is used to charge accumulators with nitrogen, check or change the existing pre-charge pressure in accumulators. The unit is screwed onto the gas valve or the hydraulic accumulator and connected via a hose to a commercial nitrogen bottle. If the nitrogen pressure is only to be checked or reduced, the charging hose does not need to be connected. The unit has a screw-type fitting with a built-in pressure gauge, check valve and a spindle for opening the accumulator gas valve to control the pressure.


  • Valve body
  • Spindle
  • Check valve
  • Release valve
  • Pressure gauge