Pilot-operated safety relief valve assembly

Details Pilot-operated safety relief valve assembly Pilot-operated safety relief valve assembly

G - Physics

05

D

G05D 16/00 (2006.01) F16K 17/10 (2006.01) G05D 7/00 (2006.01) G05D 16/16 (2006.01)

Patent

CA 2252874

An assembly and method for controlling the opening of a safety relief valve (10) exposed to a system fluid pressure and containing a control fluid which controls the opening of the safety relief valve (10) is shown. The assembly includes a pilot valve (30) connected to the safety relief valve (10) and adapted to respond to a predetermined pressure of the system fluid for permitting flow of the control fluid. A regulator (34) receives the control fluid and operates to reduce the pressure of the control fluid with a predetermined amount. The safety relief valve (10) opens in response to the reduction of the control fluid pressure, and the remaining control fluid pressure modulates the opening of the safety relief valve (10).

L'invention concerne un ensemble et un procédé pour commander l'ouverture d'une soupape de sûreté (10) exposée à la pression hydraulique d'un système et contenant un fluide de commande qui commande l'ouverture de la soupape de sûreté (10). L'ensemble comporte une soupape pilote (30) reliée à la soupape de sûreté (10) et apte à réagir à une pression prédéterminée du fluide du système pourpermettre l'écoulement du fluide de commande. Un régulateur (34) reçoit le fluide de commande et agit pour réduire d'une valeur prédéterminée la pression de ce dernier. La soupape de sûreté (10) s'ouvre en réaction à la réduction de la pression du fluide de commande, et la pression du fluide de commande restante module l'ouverture de la soupape de sûreté (10).

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