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Researchers at the Shanghai Space Propulsion Institute (SSPI) have achieved a breakthrough with the development of China‘s first lightweight and fast-response cryogenic solenoid valve. This accomplishment marks a significant leap forward in the country’s space propulsion technology.

The valve has undergone rigorous testing, completing 20,000 life cycles

Developing a valve for cryogenic propellants, like liquid oxygen and methane, presents a unique challenge. The valve needs to be lightweight yet ensure a stable response and reliable seal at extremely low temperatures. The SSPI team tackled this hurdle through innovative design. They employed air gap insulation, reduced heat transfer paths, and optimized the magnetic circuit, allowing the valve to function flawlessly between -60 and -40°C while achieving a rapid switching action. Special attention was also paid to sealing materials and structures to guarantee a tight seal at both room and low temperatures.

China Satellite
Image Credits: NASA

The newly developed valve has undergone rigorous testing, successfully completing 20,000 life cycles with liquid nitrogen and performing flawlessly during engine thermal tests. These tests confirm its exceptional response speed, low-temperature adaptability, and reliable sealing. This achievement positions China at the forefront of cryogenic valve technology.

The SSPI’s innovative valve significantly enhances the efficiency and accuracy of liquid oxygen-methane engines. This paves the way for further advancements in cryogenic space propulsion technology, a critical area for future space exploration endeavors. The institute, known for its contributions to China’s prestigious space programs like “Shenzhou” and “Chang’e,” continues to push the boundaries of space tech, solidifying China’s position as a major player in the global space race.

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