Improved flow control device

Details Improved flow control device Improved flow control device

B - Operations, Transporting

60

T

B60T 15/52 (2006.01) B60T 15/54 (2006.01) F15B 13/04 (2006.01) F16K 15/06 (2006.01)

Patent

CA 2645075

A flow control device (30) having a first port (34), a second .rho.ort (66), a third port (36) and the movable member (42). In a first mode, the movable member seals the second port while allowing fluid flow between the first and third ports, wherein the differential pressure between the first port and third port, during the first mode, is about zero. In the second mode, the movable member seals the first port while allowing fluid flow between the third port and second port, wherein the movable member is adapted to transition from the first mode to the second mode in response to a small change in differential pressure.

L'invention concerne un appareil de contrôle de flux (30) comprenant un premier port (34), un deuxième port (66), un troisième port (36) et un élément mobile (42). Dans un premier mode, l'élément mobile ferme hermétiquement le deuxième port tout en permettant un écoulement de fluide entre le premier et le troisième ports, la différence de pression entre le premier port et le troisième port, au cours du premier mode, étant d'environ zéro. Dans le deuxième mode, l'élément mobile ferme hermétiquement le premier port tout en permettant un écoulement de fluide entre le troisième port et le deuxième port, l'élément mobile étant conçu pour effectuer une transition du premier mode au deuxième mode en réponse à un léger changement de la différence de pression.

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