Self-lubricated plug valve having a quick-change jacket

A self-lubricated plug valve having a quick-change jacket, of the type that has a tapered shutter (2) and a jacket (3) provided inside a pressure vessel configured as from a body (4) and an upper lid (5), connected by means of studs (6) and nuts (7), and sealed with several seals (8), having optionally a lower lid (9) in order to enable its removal, in which shutter (2) and said jacket (3) present respective through holes and the closing occurs by means of the 90° rotation of the shutter (2) inside the jacket (3), characterized by the fact that the jacket (3) is inserted in a removable jacket mounting (10), the configuration of which is adjusted in order to adapt to the inside of the body (4), allowing the change of the complete jacket mounting set (10), the jacket (3) and the shutter (2), so as to proceed to the replacement of the jacket (3).