Regulator for low concentration corrosive and reactive gases

G - Physics – 05 – D

Patent

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Details

G05D 16/00 (2006.01) G05D 16/06 (2006.01) G05D 16/10 (2006.01)

Patent

CA 2459639

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.

L'invention concerne un régulateur sans filtre conçu pour servir dans des systèmes à débit de fluide traitant des gaz réactifs à faible concentration. Ledit régulateur comprend un orifice d'entrée, un orifice de sortie et une voie d'écoulement de fluide définie entre les orifices d'entrée et de sortie par les surfaces internes du boîtier. Le régulateur comprend aussi une section de régulation de pression conçue pour réduire la pression d'un gaz réactif circulant dans le régulateur entre lesdits orifices d'entrée et de sortie. Les surfaces internes du boîtier sont faites d'un matériau convenable et l'aire combinée des surfaces internes est d'une taille suffisante pour faciliter l'utilisation du régulateur à l'intérieur du système sans passivation des gaz réactifs à faible concentration (p. ex. de l'ordre de 10 ppm ou moins), tout en minimisant ou prévenant sensiblement les pertes notables de gaz réactifs attribuables à la réaction et/ou à l'adsorption à l'intérieur du régulateur.

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