There is a vent valve between the crude argon column and the crude argon liquefier. Is it necessary to vent some gas during normal operation?

Since I can’t see the flowchart, I can only guess the answer; it’s for reference only. This process might be from Hangyang. The function of this valve is to vent the temporarily substandard product before the qualified process argon (argon with oxygen components removed) produced by the crude argon column, thereby preventing contamination of the pure argon column. Once the oxygen content in the process argon meets the specified standards, this valve can be gradually closed to feed the oxygen-free argon into the refined argon column, thereby removing the nitrogen components from the argon. It’s best to use an image when discussing such topics, as visual aids make the explanation more accurate. It’s just a speculative explanation for reference only. It is recommended to make full use of the resources at hand, namely the technical personnel around you.