Valve

摘要

A valve for communicating a source 14 of compressed fluid with an opening 13 of an adjacent chamber 12 in a sleeve 11 comprises a circumferentially separated array of depressions 15 in the outer periphery of a bolt 10 . Areas 19 and 20 of the bolt periphery between the depressions 15 serve to support the radially inner side of an O-ring seal 16 when the latter is aligned with the depressions.