Introduction  The solenoid pressurizer spray valve is one of the key valves for PWR nuclear power plant, and it is of great significance for nuclear power construction to realize the independent research and development of the valve.

  Method  In this paper, Starting from the system functional requirements and technical parameter requirements of the solenoid pressurizer spray valve, the overall structure, proportional solenoid, middle thermal protection device, valve position detect and output device, control system with pilot disc of the independently-developed solenoid pressurizer spray valve were briefly introduced in this paper.

  Result  Through this independent research and development, the design technology of the solenoid pressurizer spray valve is mastered, the technical difficulties of the electromagnetic drive structure and the adaptability of the valve working under high temperature and high pressure medium conditions are solved, the system functional requirement for pressurizer spray valve is realized.

  Conclusion  The independently-developed solenoid pressurizer spray valve meets the development needs for third generation nuclear power plant, and can be popularized and applied.