Closure for the charging hole of a liquid container

摘要

The closure has a bung bushing ( 10 ) of elastic material which fits sealingly into the charging hole of the container. The bung bushing ( 10 ) has a central opening. A bung plug ( 18 ) is seated sealingly in the central opening. The bung plug ( 18 ) can be pushed out in the direction of the inside of the container. It is the valve member of a manually operable pressure-compensating valve.