Disclosed is a high-pressure gas cylinder automatic replacement device, including: a holder fixedly provided on a main plate to be positioned at one side of a connector holder of a high-pressure gas cylinder connection unit; a movable member rotatably provided at the holder; a two-stage actuator provided at the holder such that rods thereof are respectively connected to the movable member and a bracket fixed to the main plate; a docking actuator enabling the movable member to move from the holder towards the connector holder side or vice versa; a gasket removal cartridge provided at the movable member to automatically remove used gaskets from the connector holder and to accommodate the same in turn; and a gasket insertion cartridge provided at the movable member positioned at the upper portion of the gasket removal cartridge to insert a new gasket accommodated therein into the connector holder.

Disclosed is a high-pressure gas cylinder automatic replacement device, including: a holder fixedly provided on a main plate to be positioned at one side of a connector holder of a high-pressure gas cylinder connection unit; a movable member rotatably provided at the holder; a two-stage actuator provided at the holder such that rods thereof are respectively connected to the movable member and a bracket fixed to the main plate; a docking actuator enabling the movable member to move from the holder towards the connector holder side or vice versa; a gasket removal cartridge provided at the movable member to automatically remove used gaskets from the connector holder and to accommodate the same in turn; and a gasket insertion cartridge provided at the movable member positioned at the upper portion of the gasket removal cartridge to insert a new gasket accommodated therein into the connector holder.

The invention relates to a valve device (100) for a gaseous medium, in particular hydrogen, comprising a valve housing (6) which comprises a closing element (14) that is arranged therein and can be moved in the longitudinal axis (18). The closing element (14) interacts with a seal seat (16) in order to release and close a through-opening (22). The valve housing (6) is equipped with at least one spring element (8) which is supported against the closing element (14) and the valve housing (6). Furthermore, the at least one spring element (8) is made of a bimetal.

The invention relates to a method for opening a valve assembly for a fuel tank, comprising a pilot valve (V.sub.1) and at least one additional valve (V.sub.2), in particular for use in a fuel cell-operated vehicle, having the steps of applying (30) an amplification voltage (S.sub.1) in order to open the pilot valve (V.sub.1) in an opening phase (P.sub.1) of the pilot valve (V.sub.1), deactivating (32) the amplification voltage (S1) in order to terminate the opening phase (P.sub.1) of the pilot valve (V.sub.1), applying (34) a pull-in voltage (S.sub.2) in a pull-in phase (P.sub.2) of the pilot valve (V.sub.1) in order to hold the pilot valve (V.sub.1) open, and activating and deactivating (36) the pull-in voltage (S.sub.2) in an alternating manner in order to hold the pilot valve (V.sub.1) open and in order to open the at least one other value (V.sub.2) and hold same open in a readjustment phase (P.sub.3) such that the hold-open energy required on average for holding the pilot valve (v.sub.1) open and the opening energy and/or hold-open energy required on average for the at least one other valve (V.sub.2) is provided.

The invention relates to a method for opening a valve assembly for a fuel tank, comprising a pilot valve (V.sub.1) and at least one additional valve (V.sub.2), in particular for use in a fuel cell-operated vehicle, having the steps of applying (30) an amplification voltage (S.sub.1) in order to open the pilot valve (V.sub.1) in an opening phase (P.sub.1) of the pilot valve (V.sub.1), deactivating (32) the amplification voltage (S1) in order to terminate the opening phase (P.sub.1) of the pilot valve (V.sub.1), applying (34) a pull-in voltage (S.sub.2) in a pull-in phase (P.sub.2) of the pilot valve (V.sub.1) in order to hold the pilot valve (V.sub.1) open, and activating and deactivating (36) the pull-in voltage (S.sub.2) in an alternating manner in order to hold the pilot valve (V.sub.1) open and in order to open the at least one other value (V.sub.2) and hold same open in a readjustment phase (P.sub.3) such that the hold-open energy required on average for holding the pilot valve (v.sub.1) open and the opening energy and/or hold-open energy required on average for the at least one other valve (V.sub.2) is provided.

One or more indicators provide an indication of fueling status of a hydrogen powered vehicle. One or more sensors detect temperature and/or other characteristics of the fuel provided to the vehicle and provide an electrical signal to one or more of the indicators to permit an indication of fueling status. The indicators, which may be visual and/or audible, may be positioned on the fueling apparatus and on the vehicle in the vicinity of a fueling receptacle. The indicators may also be positioned elsewhere on the vehicle and may be separate from the vehicle such as on or around a fueling station and/or on separate computerized devices.

This application describes methods for responding to a storage vessel leakage event and the implementation of one or more assemblages of components to provide remediation of the leakage event. This application also describes methods of teaching storage vessel leakage remediation for responders and how to use the method of responding to storage vessel leakage event in combination with the one or more assemblages of components.

This application describes methods for responding to a storage vessel leakage event and the implementation of one or more assemblages of components to provide remediation of the leakage event. This application also describes methods of teaching storage vessel leakage remediation for responders and how to use the method of responding to storage vessel leakage event in combination with the one or more assemblages of components.

The invention relates to an indoor safety device for a liquefied fuel gas system, the system comprising a storage device storing liquefied fuel gas; a vent member arranged in fluid communication with the gas inside the storage device; and a safety valve arranged to evacuate gas when the pressure inside the storage device exceeds a predetermined first value, the safety device comprising: a vent coupling; a pressure relief valve arranged downstream of the vent coupling; and a conduit for conveying gas, adapted to be connected to the pressure relief valve, the safety device being removably connected to the system by connecting the vent coupling to the vent member, wherein the pressure relief valve is configured to release gas when the pressure inside the storage device exceeds a predetermined second value, lower than the first value.

A method for performing pressure tests on a composite pressure vessel, including providing a composite pressure vessel with at least one opening an injection of a liquid; injecting the liquid in the composite pressure vessel through the at least one opening to reach a threshold pressure; measuring an external volume variation of the composite pressure vessel; draining the liquid from the composite pressure vessel through the at least one opening; and drying an inside cavity of the composite pressure vessel with a drying gas. The drying the inside cavity of the composite pressure vessel is performed at a pressure inside the composite pressure vessel, which is lower than an external pressure. A device for manufacturing and pressure testing a composite pressure vessel.