Abstract: Disclosed is a gas plant, in particular for a gas installation, comprising an expansion system capable of converting high-pressure gas into low-pressure gas. The gas plant comprises an electricity generating system arranged in parallel with the expansion system and comprising a double-acting actuator comprising two supply ports alternately supplied with high-pressure gas, a hydraulic system connected to the double-acting actuator and configured to transform the mechanical translational energy of the actuator into mechanical rotational energy; and an electricity generator connected to the hydraulic system and configured to convert the mechanical rotational energy into electrical energy.

Abstract: The unidirectional data transfer system (3) comprises a data emitting device (5), a data receiving device (6) and a first unidirectional wire link (7) connecting the emitting and receiving devices such that the data passes from the emitting device to the receiving device. The first wire link includes a non-controllable unidirectional component (8) and the unidirectional transfer system further includes a device (19a, 19b, 20) for monitoring the quality of the transferred data.

Abstract: Disclosed is a gas plant (16), in particular for a gas installation (10), comprising an expansion system (18) capable of converting high-pressure gas into low-pressure gas. The gas plant comprises an electricity generating system (30) arranged in parallel with the expansion system (18) and comprising a double-acting actuator (32) comprising two supply ports alternately supplied with high-pressure gas, a hydraulic system (34) connected to the double-acting actuator (32) and configured to transform the mechanical translational energy of the actuator into mechanical rotational energy; and an electricity generator (36) connected to the hydraulic system (34) and configured to convert the mechanical rotational energy into electrical energy.

Abstract: The unidirectional data transfer system (3) comprises a data emitting device (5), a data receiving device (6) and a first unidirectional wire link (7) connecting the emitting and receiving devices such that the data passes from the emitting device to the receiving device. The first wire link includes a non-controllable unidirectional component (8) and the unidirectional transfer system further includes a device (19a, 19b, 20) for monitoring the quality of the transferred data.