| 摘要 |
<p>A hose-break valve comprises a valve housing (2) and a sliding gate (1) movable therealong and is connected with a pressure hose (5) which is surrounded by a protective sleeve (14), while defining a space (13) filled with a pressure medium. The sliding gate (1) is under the action of, on the one hand, the pressure medium in said space (13) and, on the other hand, a loading device (17) acting opposite the pressure medium. First and second pressure relieving devices (19 and 80-82, respectively) are provided for closing the valve by means of the loading device (17) when the pressure of the pressure medium in said space (13) respectively exceeds an upper limit value and falls short of a lower limit value.</p> |
