VALVE DEVICE

A valve member is movably provided in a fluid passage to open or close the same. A seal ring is movably assembled to a valve-side annular groove formed in an outer peripheral portion of the valve member. A fluid escape portion is formed on a downstream-side ring surface of the seal ring. A recessed...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	INAGAKI, Noriyuki
Format:	Patent
Sprache:	eng
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 valve member is movably provided in a fluid passage to open or close the same. A seal ring is movably assembled to a valve-side annular groove formed in an outer peripheral portion of the valve member. A fluid escape portion is formed on a downstream-side ring surface of the seal ring. A recessed portion is formed as the fluid escape portion and located at a radial-inside position of a sealing surface portion, which is a part of the downstream-side ring surface and tightly in contact with a downstream-side groove surface of the valve-side annular groove when the valve member is moved to a valve closed position. Fluid flows from an upstream side to a downstream side through the fluid escape portion when the valve member is moved to a valve opened position, so that the seal ring is prevented from coming out from the valve-side annular groove.