| 摘要 |
In non-return valves (10) for installation in fluid lines which rise in the flow direction, a bleed valve (40) is provided to avoid functional defects of the non-return valve (10) resulting from air bubbles formed underneath the valve plate (22), which bleed valve (40) is connected to a bleed channel (38), which runs through the outer wall of the non-return valve housing (12) and opens in the interior of the non-return valve, directly upstream of the valve seat (26). <IMAGE>
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