| 摘要 |
<p>This valve comprises a body (1) inlet and outlet pipes (5, 6), a seat (16), a stopper (17), passages (13), the cross-section of which increases in the direction of flow of the fluid and which alternate with cavities (15) forming fluid expansion chambers, these passages being defined by annular discs (13, 16) and an axial rod (18) extending the stopper (17) and delimiting between them the expansion chambers (15). The rod (18) which extends the stopper (17) includes discontinuous zones (19) with conicities which increase in the direction of flow of the fluid. <IMAGE></p> |
