G - Physics – 05 – D
Patent
G - Physics
05
D
G05D 16/10 (2006.01) G05D 7/00 (2006.01)
Patent
CA 2526448
A control valve system is disclosed which provides a mechanism by which the valve can be moved to its fail-safe position. The system includes a valve actuator (28) which receives pressurized fluid from a regulator (42). The regulator is provided with a reverse pressure exhaust valve (76) such that if pressure within the valve actuator is to be alleviated, as when the valve is to be positioned into its fail-safe position, the reverse pressure exhaust valve (76) is opened thereby providing an immediate and accurate passageway through which excess pressure within the regulator outlet can be alleviated.
L'invention concerne un système de vanne de régulation comprenant un mécanisme permettant de déplacer la vanne vers sa position de sécurité malgré défaillance. Ce système comprend un actionneur (28) qui reçoit un fluide sous pression provenant d'un régulateur (42). Ce régulateur est équipé d'une soupape de protection contre les surpressions (76). Si la pression au niveau de l'actionneur doit être relâchée, lorsque la vanne doit être placée vers sa position de sécurité malgré défaillance, par exemple, la soupape de protection contre les surpressions (76) est ouverte pour fournir un passage immédiat et précis par lequel l'excédent de pression au niveau de la sortie du régulateur peut être évacué.
Berry Steven Ernest
Davis David Blair
Hart Justin Wade
Schneider Gregg Alan
Fisher Controls International L.l.c.
Ridout & Maybee Llp
LandOfFree
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