Fluid metering method and system

G - Physics – 01 – F

Patent

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G01F 15/00 (2006.01) G01F 1/26 (2006.01) G01F 15/02 (2006.01)

Patent

CA 2499604

A flow responsive valve for a flow metering system comprising a fluid meter having a minimum measuring flow threshold. The valve is shiftable between an open position at flow rates above the minimum measuring flow threshold, and a pressure pulsating position depending on pressure differential over an inlet port and an outlet port of the valve The pressure pulsating position alters between a closed position essentially prohibiting fluid flow therethrough at flow rates below the minimum measuring flow threshold, and an open position admitting fluid flow into the supply line at a measurable flow rate above the minimum measuring flow threshold.

L'invention concerne une soupape répondant à l'écoulement et destinée à un système de mesure du débit comprenant un débitmètre possédant un seuil d'écoulement de mesure minimal. La soupape peut être déplacée entre une position ouverte à des débits supérieurs au seuil d'écoulement de mesure minimal et une position de pulsation de pression dépendant du différentiel de pression sur un orifice d'admission et sur un orifice d'évacuation de la soupape. La position de pulsation de pression passe d'une position fermée empêchant sensiblement l'écoulement de fluide à des débits inférieurs au seuil d'écoulement de mesure minimal à une position ouverte admettant l'écoulement de fluide dans la ligne d'alimentation à un débit mesurable supérieur au seuil d'écoulement de mesure minimal.

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