Inlet butterfly valve with two hard metal sealing pairs

The utility model relates to an inlet butterfly valve with two hard metal sealing pairs. The inlet butterfly valve comprises a valve body, a valve plug arranged in the valve body, a valve shaft arranged on the valve plug, and a hard working sealing pair consisting of a working sealing valve seat and...

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Bibliographische Detailangaben
Hauptverfasser:	SHAO LIUXI, JIANG MUAN, ZHANG CHANGJIANG, ZHANG SUZHEN
Format:	Patent
Sprache:	chi ; 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:	The utility model relates to an inlet butterfly valve with two hard metal sealing pairs. The inlet butterfly valve comprises a valve body, a valve plug arranged in the valve body, a valve shaft arranged on the valve plug, and a hard working sealing pair consisting of a working sealing valve seat and a working sealing ring, wherein the working sealing valve seat and the working sealing ring are arranged at an outlet end of the valve body; a maintenance-used water injection hole and a working-used water injection hole are formed in the valve body; an inlet end of the valve body is provided with a hard maintenance sealing pair consisting of a moveable maintenance sealing valve seat and a maintenance sealing ring; the outer side of the moveable maintenance sealing valve seat is provided with a shoulder of which the outer end surface is connected with the inner wall of the valve body; and the shoulder is positioned between the maintenance-used water injection hole and the working-used water injection hole. By the