A volumetric displacement preservation system for preserving a volume of flowable substance in a vessel. A fluid exchange structure has a stopper, a head portion, and a fluid exchange valve with a first condition where fluid inlet and exhaust pathways in the fluid exchange structure are simultaneously closed and a second condition where the fluid inlet and exhaust pathways are simultaneously opened by conduit joining portions in the fluid exchange valve. A chamber retains a volume of preservative gas and is connected to the fluid inlet pathway externally...
1. A volumetric displacement preservation system for preserving a volume of flowable substance in an open inner volume of a vessel, the volumetric displacement preservation system comprising: a fluid exchange structure with a stopper for creating a sealing engagement with the vessel;a fluid exhaust pathway in the fluid exchange structure with a first end to be in fluidic communication with the open inner volume of the vessel and a second end to be in fluidic communication exterior to the vessel when the stopper is engaged with the vessel wherein the flui...
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