Dynamic ball valve sealing device for three-way valves

A ball valve (10) having improved sealing between the valve member (14; 114) and the valve body (12) is presented. Improved sealing is realized by providing a sealing member (16) that is allowed to float on the outer surface (32) of the valve member (14; 114) in the closed position. By being able to...

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Bibliographische Detailangaben
1. Verfasser:	THOMAS, KURT R
Format:	Patent
Sprache:	eng ; fre ; ger
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:	A ball valve (10) having improved sealing between the valve member (14; 114) and the valve body (12) is presented. Improved sealing is realized by providing a sealing member (16) that is allowed to float on the outer surface (32) of the valve member (14; 114) in the closed position. By being able to float on the outer surface (32), the sealing member (16) can compensate for any variations in the valve member (14; 114) as a result of machining tolerances or variations in position of the valve member (14; 114) due to changes in pressure within the valve (10), thereby providing dynamic sealing The dynamic sealing is also provided by configuring the valve member (14; 114) such that it causes the sealing member (16) to be exposed to a higher biasing force in the closed position than in the open position.