During a ______ purge, the vessel is filled with liquid, then drained of liquid and filled with an inert gas.

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Multiple Choice

During a ______ purge, the vessel is filled with liquid, then drained of liquid and filled with an inert gas.

Explanation:
Siphon purge. The idea here is to use a liquid to push out the air and vapors from the vessel, then remove the liquid and backfill with an inert gas. Filling the vessel with liquid drives the existing air and any flammable vapors toward the outlet, effectively displacing them. After the liquid is drained, the space is then filled with an inert gas to sweep out what’s left and establish an inert atmosphere. This process combines liquid displacement with a subsequent inert gas purge, which distinguishes it from simply purging with inert gas or using a vacuum.

Siphon purge. The idea here is to use a liquid to push out the air and vapors from the vessel, then remove the liquid and backfill with an inert gas. Filling the vessel with liquid drives the existing air and any flammable vapors toward the outlet, effectively displacing them. After the liquid is drained, the space is then filled with an inert gas to sweep out what’s left and establish an inert atmosphere. This process combines liquid displacement with a subsequent inert gas purge, which distinguishes it from simply purging with inert gas or using a vacuum.

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