| 摘要 |
Gas supplied by a plant for separating a gas mixture by pressure swing adsorption (said plant including a compressor 2 and adsorption beds 4 and 6) to a first pipeline 8 is mixed with gas supplied to a second pipeline 18 (e.g. from one or more cylinders). The pipelines 8 and 18 both terminate in a constant outlet pipe 20. The pipeline 8 includes an automatically operable stop valve 10 and a device 14 adapted to supply gas at a constant flow rate depending on the pressure downstream thereof even though the upstream pressure fluctuates. The pipeline 18 includes a similar stop valve 26 and constant flow rate device 28. A pressure regulator 22 maintains constant pressure in the pipeline 20, thus determining the flow rates at which the devices 14 and 28 supply gas and thereby ensuring the formation of a gas mixture of constant composition. <IMAGE> |
