Precision gas blender

Details Precision gas blender Precision gas blender

1996-07-29

1999-03-09

Rivell, John

Fluid handling

Self-proportioning or correlating systems

Mixture condition maintaining or sensing

137 7, 137607, 137898, 25112905, 251210, G05D 1113

Patent

active

058787712

ABSTRACT:
Apparatus and methods for precision batch or continuous flow blending of gases are described. Pulsatile precision metering valves having substantially zero dead space are employed to introduce gases to a mixing chamber or manifold in predictable uniform quantities to achieve precision gas blends according to predetermined criteria. During batch processing, gases to be blended are repeatedly characterized by the change in mixing vessel pressure with respect to time immediately after blending. Estimates of additional amounts of a given gas to be added to achieve a desired final partial pressure of the given gas in the mixing vessel are based on empirical data previously measured and stored for the gas in question.

REFERENCES:
patent: 3817658 (1974-06-01), Murase
patent: 3948281 (1976-04-01), Strain et al.
patent: 4275752 (1981-06-01), Collier et al.
patent: 5165652 (1992-11-01), Nicolaisen
patent: 5540251 (1996-07-01), Mayeaux

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