CONSTANT FLOW RATE FLUID CONTROLLER
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United States of America Patent
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Issued Date -
Jan 24, 2013
app pub date -
Jul 22, 2011
filing date -
Jul 22, 2011
priority date (Note) -
Abandoned
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Abstract
An apparatus and method is provided for establishing a constant flow rate of a fluid, such as a gas or a liquid, into a process system. The apparatus typically includes a fluid pressure regulator, a rotameter, and a back pressure regulator. The system may also include a throttle valve. Establishing a constant flow rate involves established a fixed pressure drop across a fixed flow resistance device, such as a rotameter. The pressure of the output of the rotameter is adjusted to be higher than the backpressure from the process system.
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