Hydac Technology - Hycon Division2054186 Hydac Accumulator Charging Kit, FPS 250 F2.5 G4 K. Gauge Pressure Range - 0 to 3500 PSI, 8 ft Charging Hose. For use with Gas Valve Version 4 (8VI-ISO 4570) for SB, SBO and SK.To maintain system performance HYDAC recommends that the gas precharge pressure is checked regularly. The inevitable loss of gas precharge pressure due to permeability will change the system effectiveness (performance) and could cause damage to the bladder, diaphragm, or piston accumulator.HYDAC charging and gauging units allow hydro-pneumatic accumulators to be precharged with dry nitrogen. For these purposes, a charging and gauging unit is connected to a commercially available nitrogen bottle via a flexible charging hose. These units also allow maintenance personnel to check the current gas precharge pressure of an accumulator. Also Known As: 02054186