James H Mccurry

US Patent:

7503340, Mar 17, 2009

Filed:

Sep 30, 2005

Appl. No.:

11/240421

Inventors:

Matthew S. Klee - Wilmington DE, US
Michael Q. Thompson - Coatesville PA, US
James D. McCurry - Quakertown PA, US
Paul C. Dryden - West Grove PA, US

Assignee:

Agilent Technologies, Inc. - Santa Clara CA

International Classification:

F16K 31/12
G01N 30/02

US Classification:

1374875, 73 2336

Abstract:

A system for controlling fluid flow comprises a first fluid conduit having a length, an inner diameter, an input pressure and an output pressure, and a second fluid conduit having a length, an inner diameter, an input pressure and an output pressure where the output pressure of the first fluid conduit is the input pressure of the second fluid conduit. The system also comprises a pressure sensor configured to determine the output pressure of the first fluid conduit, and a controller configured to control the output pressure of the first fluid conduit, thereby establishing a desired fluid flow through the second fluid conduit based on the length of the second fluid conduit, the inner diameter of the second fluid conduit, the temperature of the second fluid conduit and the type of fluid flowing in the second fluid conduit.