Fluid flow control system
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United States of America Patent
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Jan 19, 2010
Grant Date -
N/A
app pub date -
Jul 31, 1987
filing date -
Aug 19, 1986
priority date (Note) -
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Abstract
A fluid flow control system includes a valve, in which a control element regulates flow through a metering orifice. A further control element regulates flow through an orifice downstream of the orifice and is responsive to the pressure downstream of the orifice and to an opposing control pressure on a line. The element is positioned in accordance with the pressure in a chamber controlled by an electrical valve. The pressure in line is set to provide a required pressure drop across the orifice.
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