Device for the regulation of flow applied to flow valves working under pressure differential
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United States of America Patent
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Oct 17, 2006
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N/A
app pub date -
Jan 30, 2004
filing date -
Jan 30, 2004
priority date (Note) -
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Abstract
A device for regulating flow comprises a main valve operating under differential pressure wherein the main valve has a main flow inlet and a main flow outlet. The main flow inlet is equipped with a valve seat over which a main shutter is adjusted in a perpendicular direction to its shuttering plane. The main shutter has a hole on its locking face communicating with a pressure chamber disposed above the main shutter. A secondary control valve regulates small flows through the hole so as to create greater or less pressure within the pressure chamber to close or open the main shutter.
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