ANTI-SURGE ACTUATOR

The present invention describes a valve actuator having a first motor (30) for moving a valve element and a second motor (30') for energizing a failsafe spring (130) . The second motor is operated independently from the first, thus allowing the valve element to be moved between its open and clo...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	WESSEL, JOERGEN, KASIN, TORSTEIN, STEN-HALVORSEN, VIDAR, JOHANSEN, JOHN, A
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ACTUATING-FLOATS BLASTING COCKS DEVICES FOR VENTING OR AERATING ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MECHANICAL ENGINEERING TAPS THERMAL INSULATION IN GENERAL VALVES WEAPONS
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Beschreibung
Zusammenfassung:	The present invention describes a valve actuator having a first motor (30) for moving a valve element and a second motor (30') for energizing a failsafe spring (130) . The second motor is operated independently from the first, thus allowing the valve element to be moved between its open and closed positions while the spring is energized. In an emergency, the spring will be de-energized and move the valve element to its failsafe position no matter the position of the valve element. La présente invention décrit un actionneur ayant un premier moteur (30) destiné à déplacer un élément de vanne et un second moteur (30') destiné à exciter un ressort à sécurité intégrée (130). Le second moteur fonctionne indépendamment du premier, permettant ainsi à l'élément de vanne de commuter entre ses positions ouverte et fermée lorsque le ressort est excité. En cas d'urgence, le ressort est désexcité et déplace l'élément de vanne vers sa position de sécurité intégrée quelle que soit la position de l'élément de vanne.