| 摘要 |
A seal coupling system for valve (2) comprises: a coupling portion (3) protruding from the body (4) of the valve (2) along a longitudinal axis (X) and suitable for engaging with a connection seat (5) of a pipe of a plant along which a fluid runs; the coupling portion (3) is provided with a first thread (6) suitable for engaging with a second thread (7) of the connection seat (5); an annular sealing gasket element (8) that is positionable on the coupling portion (3). The annular sealing gasket element (8) has a cross section, according to a plane passing through the longitudinal axis (X), that has a zone of greater thickness (S1), measured orthogonally to the longitudinal axis (X), and a zone of lesser thickness (S2) configured for penetrating and being tightened between the second thread (7) and a surface (17) of the coupling portion (3) when the latter is screwed on the connection seat (5); constraining means (10) is also provided that are configured for preventing a relative rotation of the annular sealing gasket element (8) with respect to the coupling portion (3). |
