| 摘要 |
<p>An over-pressure protection system comprising a conduit section (1) extending between a pressure reduction valve (4) and a low-pressure fluid handling system (6), a shut-off valve (8) provided with an actuator (9) arranged in the conduit section (1), pressure sensors (10, 11) arranged one on either side of the shut-off valve (8) in the conduit section (1), a safety control system (15) that communicates with the actuator (9) and the pressure sensors (10, 11) which produces a signal (28) when it detects a high pressure in the conduit section (1), and a self-diagnostic system (30) for checking the shut-off valve (8) and the pressure sensors (10, 11) that communicates with the actuator (9), the pressure sensors (10, 11) and the safety control system (15), which self-diagnostic system (30) produces a signal (31) when it detects a failure in either the shut-off valve (8) or the pressure sensors (10, 11) or both.</p> |
