DUMP VALVE

A dump valve having a housing 1, an inlet port 3A for flow of pressurised fluid into the housing, an exhaust port 20 for passage of fluid from the housing, a supply port 3B for fluid communication between the housing and means to be acted on by the pressurised fluid, a main valve member 10 movable i...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	RONALD NORRIS WHYTE
Format:	Patent
Sprache:	eng
Schlagworte:	ACTUATING-FLOATS BLASTING COCKS DEVICES FOR VENTING OR AERATING EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING ENGINEERING ELEMENTS AND UNITS FIXED CONSTRUCTIONS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MECHANICAL ENGINEERING MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS TAPS THERMAL INSULATION IN GENERAL VALVES WEAPONS
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Beschreibung
Zusammenfassung:	A dump valve having a housing 1, an inlet port 3A for flow of pressurised fluid into the housing, an exhaust port 20 for passage of fluid from the housing, a supply port 3B for fluid communication between the housing and means to be acted on by the pressurised fluid, a main valve member 10 movable in the housing to open or close communication between the supply port and the exhaust port, the main valve member being biassed towards its open position and movable into its closed position under the effect of pressurised fluid at the inlet port, a passageway 12 providing fluid communication between the inlet port and the supply port, and a check valve member 13 movable to open or close said passageway, the check valve member being biassed towards its closed position and movable into its open position under the effect of pressurised fluid at the inlet port, the arrangement being such that the pressure of fluid required to move the check valve member from its closed to its open position is greater than that required to move the main valve member from its open to its closed position.