ASSEMBLAGE DE MISE EN COMPRESSION DE SIEGE DE VANNE A BOULE

摘要

The main object of the invention is an annular assembly (10) for compressing the seat (6) of a ball valve (1), characterized in that it comprises a valve body (5) or an insert ( 7), provided with an internal annular countersink (5a) defining an inside diameter (Di), a sheath (8) inserted in said inner annular counterbore (5a), defining at least one outer diameter (De) of the sheath ( 8), the body (5) or the insert (7) defining with the sheath (8) an annular housing (11) in which the assembly (10) comprises successively: a downstream stack (12) of head rings, an annular head wedge (13), a stack of compression means (14), an annular bottom wedge (16) and an upstream stack (17) of bottom rings.