| 摘要 |
<p>The invention relates to a control system (10) for a subatmospheric-pressure-actuable shut-off valve, intended for a subatmospheric-pressure waste-water (sewage) system, comprising a first valve (14) which can be actuated by a dynamic pressure caused by accumulated wastewater, and a chamber (56) which can be pressure-adjusted via the first valve and in which, or adjacent to which, there is adjustably arranged a valve piston (24), acted upon by a spring (71), of a second valve (20) via which, in dependence on the pressure prevailing in the chamber, a subatmospheric pressure passes to the shut-off valve in order to open the same, wherein, in the absence of dynamic pressure, the first valve closes and a pressure change which is necessary for closing the second valve takes place in the chamber. <IMAGE></p> |
