| 摘要 |
A valve leakage system includes a first pressure sensor, a high pressure shut off valve (HPSOV) downstream of the first pressure sensor, and a manifold downstream of the HPSOV. A second pressure sensor is in communication with the manifold; a system component (such as a lower pressure valve) is downstream of the manifold; and a duct is between the system component and the manifold. An exhaust area (such as a hole) is in one of the duct, the manifold, and the system component. A comparator unit compares pressure between the first and second pressure sensors to enable the detection of a leak in the HPSOV. The sizing of the exhaust area is established to differentiate between an allowable HPSOV leakage and a leakage indicative of a failure requiring maintenances or replacement. |
