Regulator for low concentration corrosive and reactive gases

Details Regulator for low concentration corrosive and reactive gases Regulator for low concentration corrosive and reactive gases

2006-07-25

2006-07-25

Lee, Kevin (Department: 3753)

Fluid handling

Processes

Involving pressure control

C137S613000, C137S505250

Reexamination Certificate

active

07080655

ABSTRACT:
A filter-less regulator is implemented for use in fluid flow systems that process low concentration reactive gases. The regulator includes an inlet, an outlet and a fluid flow path defined between the inlet and outlet by internal surfaces of the housing. The regulator further includes a pressure regulating section to reduce the pressure of a reactive gas flowing through the regulator between the housing inlet and the housing outlet. The internal surfaces of the housing are formed of a suitable material and the combined area of the internal surfaces is sufficiently sized to facilitate use of the regulator in the system without prior passivation for reactive gases at low concentrations (e.g., in the range of about 10 ppm or lower) while minimizing or substantially preventing significant loss of the reactive gas due to reaction and/or adsorption within the regulator.

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CRN OH 5216.5C, Calgaz 432 Series Regulator.
Calgaz—Regulators—1000 Series; pp. 1-2.
Report, European Search Report, EP 04075621, Dec. 3, 2004.
Article, J. McAndrew, B. Jurcik D. Znamenski “Using Simulation to Optimize Gas Distribution System and Performance”, Journal of the IES, Jul./Aug. 1994.
Article, H-C Wang, G. Doddi, S. Chesters: “Estimating the Lifetime of Electropolished Stainless Steel (EPSS) Tubing in Corrosive Gas Service”, Journal of the IES, Jul./Aug. 1994.

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