Nitrogen gas introduction issue

The purpose of nitrogen purging is to remove any substances that may react chemically with the production materials, by using purging to eliminate them. Nitrogen sealing is a measure taken to prevent the leakage of materials by using pressure. For reference.

After the displacement, isn’t the gas phase inside also nitrogen? When nitrogen is introduced through the nitrogen seal, doesn’t that also expel the gas inside?

“Are nitrogen displacement and nitrogen sealing the same thing? When should a self-acting control valve be installed? Should the material be introduced first or nitrogen first for the nitrogen seal? What about nitrogen pressure feeding? ” 1. “Are nitrogen displacement and nitrogen sealing the same thing?” ”No, for the purpose of replacement, see my previous reply. 2. “Should the material be introduced first or nitrogen first for nitrogen sealing?” ”It shall be implemented in accordance with the requirements of the production process. 3. “What is nitrogen pressure feeding?” ”It uses nitrogen pressure as power to transport materials. The remaining questions can only be explained based on your production process; it would be best to include a simple diagram, as explaining things with visuals makes it more intuitive. Regarding what a permutation is, I recommend taking another look at my explanation; it’s best to find it on Baidu. To learn this kind of knowledge, one must first understand the process; start by learning the principles behind it, and seek advice from the experienced workers on site – it is their responsibility to do so. But this requires communication, and it’s not possible,,,,. For reference.