automatic shutoff (ASO) definition

- - - - -

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

in gas source control equipment, a remotely actuated valve, preferably the cylinder valve, but possibly a valve located close to the cylinder valve, that can isolate the product as close to the cylinder valve as possible. It may also be a device that attaches to the cylinder valve stem or handle to close the valve. [SEMI F13-93]