| 摘要 |
A safety valve for isolating a portion of a service conduit from a vacuum generator should a leak occur in that portion of the service circuit. The safety valve has a housing with a chamber therein. The chamber has an inlet port connected to the service circuit and an outlet port connected to the vacuum generator. A wall member located in the chamber is biased by a spring toward a first position whereby the vacuum generator is connected to the service circuit. Should a leak occur in the service circuit, air flow through the chamber acts on the wall to overcome the resistance of the spring and moves the wall to a second position to seal the chamber and thereby interrupts air flow through the chamber to the vacuum generator.
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