EXCESS FLOW VALVE FOR CRYOGENIC FLUID TANK

An excess flow valve for cryogenic fluid is disclosed. An example excess flow valve (100) includes a body (200), a piston plug (300), and a spring (400). The body (200) includes a valve seat (246) and an inner body surface (240) that defines an inlet (215), an outlet (225), and a chamber (250). The...

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Bibliographische Detailangaben
Hauptverfasser:	ZHANG, Zhao, CAO, Guangbin
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:	An excess flow valve for cryogenic fluid is disclosed. An example excess flow valve (100) includes a body (200), a piston plug (300), and a spring (400). The body (200) includes a valve seat (246) and an inner body surface (240) that defines an inlet (215), an outlet (225), and a chamber (250). The piston plug (300) is disposed within the chamber (250). The piston plug (300) includes a plug (330) that is configured to engage the valve seat (246) in a closed position and be disengaged from the valve seat (246) in an open position. The piston plug (300) includes an inner piston surface (354), an outer piston surface (352), and a flange (340) that extends from the outer piston surface (352) and defines a flange surface (342). The flange (340), the outer piston surface (352), and the inner body surface (240) at least partially define a spring slot (256) outside of the fluid flow path. The spring (400) is disposed in the spring slot (256) to bias the piston plug toward the open position. The excess flow valve is more effective.