What charging & gauging kit do I need?

For accumulators with metric style M28 x 1.5 gas valves (HYDAC Gas Valve Version 1), you will need an FPK Kit. For accumulators with schrader style ISO 4570 (VG8) gas valves (HYDAC Gas Valve Version 4), you will need an FPS Kit. For charging of both style gas valves, you will need an FPK Kit with an A3 (FPK/SB) Adapter. For accumulators with 2-piece style gas valves, you will need an FPO Kit.