Valve, particularly suitable for pressure piping

Claim 1

A valve for pressure piping comprising a dismantling sleeve constituting part of the piping, said sleeve having opposite ends and including a valve service seat at one end of said dismantling sleeve, an obturator for opening and closing the valve and which seats on said valve service seat when the valve is closed, a case for the valve, said dismantling sleeve being approximately round in cross section, adjustable centering means on said case for making the end of said dismantling sleeve carrying said valve seat round, and means for mounting said dismantling sleeve for axial adjustment with respect to the pressure piping and to said case and comprising a plurality of external ears spaced around the circumference, and on the outer surface, of said dismantling sleeve, a plurality of parallel threaded bolts freely passing through said ears, a series of threaded holes in said valve body into which one of the ends of said bolts are screwed, a flange on the pressure piping for releasably holding the other ends of said bolts, and nuts screwed onto said bolts and located on either side of each of said ears for permitting axial adjustment of said dismantling sleeve and the service seat carried thereby, by changing the positions of said nuts on said bolts.