Shut-off valve and control method for controlling a hydrogen flow from a pressurized tank

A shut-off valve (100) for controlling a pressurized gas flow from a pressurized gas vessel (109) into a chamber (111) in a system,

• wherein the shut-off valve (100) comprises:
• a main valve (101),
• a pilot valve (103),
• a coil (105),
• and a tension spring (107),
• wherein the coil (105) is configured to move the pilot valve (103) from a first pilot valve position to a second pilot valve position when the coil (105) is energized, wherein, in the first pilot valve position, the pilot valve (103) gas-tightly seals a control channel (115) in the main valve (101) between a control chamber (117) of the shut-off valve (100) and the chamber (111) in the system, and in the second pilot valve position, the pilot valve (103) opens the control channel (115) in the main valve (101) such that the pressurized gas flows from the control chamber (117), through the control channel (115), and to the chamber (111) in the system and the pilot valve (103) is retracted into the control chamber (117) above the pilot valve (103), wherein the tension spring (107) mechanically couples the pilot valve (103) to the main valve (101) and applies a pulling force to the main valve (101) in order to move the main valve (101) from a first main valve position into a second main valve position when the pilot valve (103) moves into the second pilot valve position, wherein in the first main valve position, the main valve (101) gas-tightly seals a main channel (123) that connects the pressurized gas vessel (109) to the chamber (111) in the system, while in the second main valve position, the main valve (101) opens the main channel (123), wherein the control chamber (117) is arranged above the pilot valve (103), and the pilot valve (103) comprises an auxiliary control channel (119) defined by a bore inside the pilot valve (103) connecting the control chamber (117) to the control channel (115) in the main valve (101) such that the pilot valve (103) moves into the control chamber (117) when the pilot valve (103) moves to the second pilot valve position.