| 摘要 |
A valve seat arrangement (4) in a hydraulic valve (1) provided with a bidirectional secondary barrier (5) including a first upstream seal (51) and a second downstream seal (52) and an intermediate axially movable seal supporting element (53) the seal supporting element (53) including at a first end an annular first seal abutment (531) surrounded by a second supporting abutment surface (534) displaced in the axial direction towards a valve seat (42); and the seal supporting element (53) including at a second end an annular second seal abutment (532) surrounding a first supporting abutment surface (532) displaced in the axial direction away from the valve seat (42). |
