Importance

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Abstract

A flow meter configuration with improved inlet and outlet porting for improving the Turndown Ratio including a chamber having opposed arcuate chamber walls and a central axis extending therethrough, at least one gear for rotation within the chamber wherein the at least one gear is positioned to seal against a chamber wall during rotation, an inlet in fluid communication with the chamber, the inlet including an inlet wall, an outlet in fluid communication with said chamber, the outlet including an outlet wall, and wherein at least one of the inlet wall and outlet wall is angled relative to the central axis so as to form a porting angle less than 90°. In some embodiments, the opposed arcuate chamber walls may lie on an arc of less than 180°.

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First Claim