Abstract: A carbonating cylinder containing carbon dioxide under pressure is provided with an outlet valve which is arranged to co-operate with an inlet valve mounted in the wall of a beer keg.The outlet valve comprises a passageway having a reduced diameter portion opening into the carbonating cylinder and an enlarged diameter portion. An operating member is slidably mounted in the passageway and is releasably held therein by a screw extending through the wall of the valve into a reduced diameter portion of the operating member. The inner end of the operating member co-operates with a sealing member having an enlarged head which has a sealing ring which may sealably engage the wall of the cylinder. The outer end of the operating member has a discharge nozzle which extends axially into the member and communicates with the passageway via transverse ducts.

Abstract: A valve actuator is adapted to connect between an outlet valve of the type having a projecting operating needle on a pressure vessel and an inlet valve on a container, and comprises a coupling having securing means to releaseably secure the actuator to the body of the outlet valve. The coupling has a bore within which a piston is arranged to slide, and the piston is adapted to engage with the operating needle on sliding movement of the piston relatively to the coupling, to operate the outlet valve.