| 摘要 |
<p>A non-return valve which upon reversal of the flow direction is rapidly closed without impingement of the valve member on the seat with a bang comprises a stationary valve guide bush wherein the valve member is adapted for axial displacement and whereby between the valve guide bush and the valve member there is provided a slotted space such that the closing movement of the valve member is damped just before it impinges on the seat.</p> |
