The Pureline OC6200 draws in room air through a filter. A compressor sends the filtered air to a solenoid valve, which moves it into one cylinder of Pureline’s two-cylinder design. This two-cylinder design ensures a constant supply of oxygen; while one side is being used, the other side is being replenished. Under pressure inside the cylinder, the molecular sieve material attracts and holds the nitrogen from the room air (21% O2). The enriched oxygen (92-95% O2) is directed to the pressure regulator, a final filter, and finally out to the anesthesia machine. Remember, while one cylinder is in use, the other is refilling with enriched oxygen ensuring you a constant, reliable supply of oxygen.