HU55231-1 is a precision aerospace component compliant with AS9100D quality standards and FAA/EASA regulations, dedicated to aircraft engine pneumatic control systems.It acts as a high-reliability 2/2-way solenoid valve, a core on-off control part for MRO replacement. It precisely switches high-pressure pneumatic circuits per the engine control unit signals, regulates air supply for key actuators like variable stator vanes, ensures fast, accurate response to control commands, maintains stable pneumatic pressure under all flight conditions, prevents air leakage or circuit blockage, and avoids malfunction of engine adjustment mechanisms.Made of aviation-grade corrosion-resistant alloy with hermetically sealed coil, it resists vibration, high temperature and moisture, working stably at -55℃ to 230℃. Weighing 0.14kg, it features compact design, low power consumption, standardized quick-connect ports and reliable sealing, enabling easy installation and long-term stable operation. It is critical to guarantee engine pneumatic control accuracy and overall operational safety.