This is the Coltri Remote Filling Panel Double Pressure with Lever Taps Remote double pressure refill panel with cylinder connections from a choice of: DRV DIN 232 bar + DRV DIN 300 bar DRV INT/YOKE 232 bar + DRV DIN 300 bar The Double Pressure Remote Charging Panel includes the "Priority Panel."Priority panelThe priority panel is an ideal solution for simple and effective storage management. It automatically manages the air flow in the filling station between the compressor, storage, and cylinders. The user can simply connect the empty cylinders to the filling panel and open their valves.Operation Compressed air from the storage system is siphoned into the cylinder. If the pressure drop in storage exceeds the delta P set in the pressure switch, the compressor will turn on. Transferring lasts until the pressure equalizes between the compressed air cylinder and the storage system. When pressure equilibrium is reached, the compressor fills, until the cylinder&';s filling pressure is reached, the cylinder with compressed air. When the cylinder has been filled, a new switchover occurs through a holding valve, and the compressor fills the storage system until it automatically shuts off when the maximum filling pressure is reached. This procedure is carried out without manual intervention. Included: 2 + 2 cylinder connections 1 Manometer 4 HP filling connections 1.20 m - 3.9 ft 1 HP filling connection 3 m - 9.8 ft