| 摘要 |
<p>In order to cut off the flow of highly polluted fluids such as sewage, liquid manure and the like, a valve should be self-cleaning in its operation in order to stop any passage of flow sufficiently. To this end a valve according to the invention may be applied with a valve body in the shape of a rotatable throttle (5, 8), which at its periphery has two mutually separate flexible projections (6, 7) running along the periphery of the throttle in an unbroken line and partly scraping off and partly sealing the pipe wall when the valve is closed. The projections (6, 7) and the core (5) of the throttle are preferably made of a flexible plastic. On both sides of the throttle plates (8) are attached which by means of throughgoing bolts (9) partly provide the throttle with sufficient rigidity and partly squeeze it tightly to the throughgoing spindle (4).</p> |
