Dedrooped bypass valve

G - Physics – 05 – D

Patent

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Details

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

Patent

CA 2194436

A differential pressure regulator (10) connected in a fluid system including a bypass line (20), a high pressure inlet (32), a compensation inlet (70) connected to the high pressure side of the system, a low pressure inlet (35) and a bypass outlet (25). A spring biased reciprocable valve member (40) having an intermediate passage (60) between the compensation inlet (70) and the bypass outlet (25), a metering port (50) between the intermediate passage and the bypass outlet (25), and a compensating port (45) between the compensating inlet (70) and the intermediate passage (60). The high and low pressure inlets (32, 35) are coupled to high and low pressure faces (41, 42) on the valve member. A compensating chamber (80) including an inlet (85) connected to the intermediate passage (60) and a third pressure face (90) results in a compensating force which moves the valve member (40) toward the closed position.

Régulateur (10) de pression différentielle raccordé à un système de transport de fluide comprenant une conduite de dérivation (20), un orifice d'entrée (32) de fluide à pression élevée, un orifice d'entrée (70) de compensation raccordé au côté à pression élevée du système, un orifice d'entrée (35) de fluide à pression basse et un orifice de sortie (25) de dérivation. Un élément (40) de soupape à mouvement de va-et-vient contraint par ressort possède un passage intermédiaire (60) entre l'orifice d'entrée (70) de compensation et l'orifice de sortie (25) de dérivation, un orifice de mesure (50) entre le passage intermédiaire et l'orifice de sortie (25) de dérivation, et un orifice (45) de compensation entre l'orifice d'entrée (70) de compensation et le passage intermédiaire (60). Les orifices d'entrée (32, 35) de fluide à pression élevée et basse sont raccordés à des surfaces (41, 42) à pression élevée et basse sur l'élément de soupape. Une chambre de compensation (80) comprenant un orifice d'entrée (85) raccordé au passage intermédiaire (60) et une troisième surface (90) de pression permet d'obtenir une force de compensation qui déplace l'élément de soupape (40) vers une position de fermeture.

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