Weka cryogenic safety valves protect super-conductive magnets in ITER

ITER is an international research project with the goal of building a thermonuclear reactor and generating electricity from fusion energy for the first time.
Giant superconducting magnets position plasma in the reactor. These magnets are cooled with liquid helium at temperatures close to absolute zero. The greatest danger in a system such as this is that the magnets lose their superconductivity (“quench”) and high pressure is created in the system in a very short period of time by evaporating helium. This high pressure would wreck the systems. In order to avoid this, safety valves are used that have to meet the highest demands.
This special type of valve must trigger very accurately and discharge large and extremely cold mass flows. In doing so, the valuable helium is not released into the atmosphere, but rather forwarded into buffer containers. In contrast to conventional safety valves, these valves must always address the specified pressure, independent of the pressure that prevails behind the valve. Of course, in smooth operation, the valves must be sealed well, in order to prevent the least loss of helium as possible. In addition, they must be very compact and resist the prevailing radiation and magnetic field.
The application of the EN ISO 4126 standard and the acquisition of the EU type examination certificate ensure Weka the entry in to the market for cryogenic safety valves!