Fluid metering, mixing and composition control system

Details Fluid metering, mixing and composition control system Fluid metering, mixing and composition control system

1994-04-28

1995-06-13

Therkorn, Ernest G.

Pumps

Motor driven

Electric or magnetic motor

417420, 418188, 210101, 2101982, B01D 1508, F04B 1700

Patent

active

054236614

ABSTRACT:
A gear pump is used for the primary flow source for a low pressure, high performance separation system. The pump is controlled such that its flow and leakage characteristics are compensated by an electronic controller which results in controlled output flow rates to a variety of loads. The pump is particularly suited for use in liquid chromatography (LC) systems, especially LC systems which use membrane based separation media. A modification to the gear pump results in an efficient mixer, further enhancing its use in LC systems which involve gradient operational modes. Also disclosed are embodiments which allow the gear pump to be used in high pressure separation systems, e.g., high performance liquid chromatography (HPLC) systems.

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Snyder, Introduction to Modern Liquid Chromatography, John Wiley & Sons, New York, 1979, pp. 90-103.

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