This oxygen cylinder filling compressor is designed for an inlet pressure of 3–4 barg (40–60 psig) and a discharge pressure of 150 barg (2150 psig). It works in combination with a small PSA oxygen generation system, with a flow rate of 4–12 Nm³/h, providing clean oxygen cylinder filling services for community hospitals and island hospitals. The system is capable of continuous 24-hour operation, with a recommended maximum of 6–8 cylinders per filling batch.