FIELD: physics.
SUBSTANCE: emergency shutdown system has an emergency valve, a control line over which a signal giving positioning of the emergency valve is transmitted, a solenoid valve unit connected to the control line for positioning the emergency valve, and an interfacing loop connected to the control line and the solenoid valve unit. In certain versions, the interfacing loop has a key, such as a relay, which reacts on the said signal and facilitates control of switching on the solenoid value to the control line and therefore power supply to that unit.
EFFECT: more reliable actuation of the system.
25 cl, 5 dwg
