The HYDAC universal charging and testing unit FPU-1, is used to charge bladder, piston and diaphragm accumulators with nitrogen, or to test and alter the pre-charge pressure. Due to the wide product range of gas-side adapters to the accumulator and to the nitrogen bottle, HYDAC ensures the charging of practically all hydraulic accumulators. An extensive product range of accessories, e.g. hoses, the pressure-reducing valve and also the case, can be assembled in accordance with customer preferences to round out the programme.

In the standard version, the FPU-1 is comprised of: