Excerpt from Dingler's Polytechnisches Journal, Vol. 252: Jahrgang 1884
E. Codron in Lille benutzt'neuerdings die in Fig. 6 bis 8 Taf. 1 nach dem Portefeuille e'conomz'que des Machines, 1888 S. 164 dargestellten Ein richtungen. In Fig. 6 hat das Ventil zwei concentrische, in einer Ebene liegende Sitzflächen. Unterhalb des mittleren Theiles des Ventiltellers ist ein Raum H abgeschlossen, welcher durch eine feine Bohrung 0 stets mit der freien Luft verbunden ist. Sobald das Ventil durch zu hohen Dampfdruck nur ein wenig gehoben wird, tritt der Dampf in den Raum H ein und, da durch die Bohrung 0 nur sehr wenig Dampf entweichen kann, so wird sofort auch der mittlere Theil des Ventiles als Druck fläche zu der ringförmigen hinzutreten und dadurch eine reichliche Er hebung des Ventiles bewirkt werden. Diese Anordnung dürfte wohl brauchbar sein.
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