BUTTERFLY VALVE SEAT RING AND BUTTERFLY VALVE PROVIDED WITH SAME

A seat ring (15) for a butterfly valve (11) is mounted on an inner peripheral surface of an internal flow passage extending along the flow passage axis in a valve body (13) of the butterfly valve (11), so that an outer peripheral edge surface of a valve element (17) supported to be rotatable in the...

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Bibliographische Detailangaben
Hauptverfasser:	YAMASHITA, Seiji, YAMAMOTO, Yukihisa
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 seat ring (15) for a butterfly valve (11) is mounted on an inner peripheral surface of an internal flow passage extending along the flow passage axis in a valve body (13) of the butterfly valve (11), so that an outer peripheral edge surface of a valve element (17) supported to be rotatable in the internal flow passage by a valve stem (19) supported by the valve body (13) abuts on the seat ring (15). The seat ring (15) includes a ring body (15a) having a cylindrical shape and extending in the center axis direction, and the ring body (15a) is formed at positions opposite to each other in a radial direction of the ring body (15a) with a pair of through-holes (15c, 15c) for allowing the valve stem (19) to pass through. On an outer peripheral surface of the ring body (15a), arcuate projections (23, 23) extending in a circumferential direction are formed apart from the pair of through-holes (15c, 15c).