| 摘要 |
<p>The first automatic valve (66) of a safeguard (36) is connected in the flow path (60) of a sanitary fitting. The diaphragm (122), as the valve body (90) of the second valve (68) interacts with the valve seat (72) and the first valve (66) is arranged on said diaphragm. Under normal operating conditions, the second valve (68) is closed and the first valve (66) is opened. Under conditions allowing backflow counter to the direction of the arrow S, the first valve (66) closes automatically, by which means the diaphragm (122) is deformed counter to the direction of the arrow S due to the suction on the input side, which results in the second valve (68) being inevitably opened. By this means, water is prevented from flowing back into the feedline and the outlet is connected to the ambient air through the opened second valve (68) and the aeration path (58). (Figure 7)</p> |
