Woodward 9905-867 is a specialized pilot-operated actuator solenoid engineered for precise control in engine and industrial power system applications. Rated for 12V DC operation,

 it features a "normally open" (NO) configuration—remaining open to fluid or gas flow when de-energized, and closing only upon receiving an electrical signal. 

This design is critical for applications requiring fail-safe fluid/gas passage in engine fuel systems, hydraulic actuation loops, or turbine control circuits.

As a pilot-operated solenoid, it uses a small pilot valve to control the main valve’s operation, enabling it to handle higher flow rates and pressure ranges compared to direct-acting solenoids, making it suitable for medium-to-large industrial power equipment. 

Constructed with Woodward’s signature durable materials (including high-temperature-resistant coil insulation and leak-proof metallic housing), 

the 9905-867 withstands harsh operating conditions such as engine vibration, extreme temperatures (-40°C to 125°C typical), and chemical exposure from fuel or hydraulic fluids.

Key applications include integration with Woodward engine governors, diesel/gas engine fuel control systems, and industrial actuator units. Core specifications: 12V DC rated voltage, normally open (NO) operation, pilot-operated actuation, 

compatible with diesel fuel/hydraulic oil, and compliance with industrial standards (e.g., SAE J1939 for automotive/engine communications).

伍德沃德（Woodward）9905-867 是一款专为发动机及工业动力系统设计的先导式执行器电磁阀，核心功能是实现流体或气体的精准通断控制。该产品额定供电为 12 伏直流（12V DC），

采用 “常开型”（NO）设计 —— 断电状态下保持通路，允许流体 / 气体正常流通；仅在接收到电信号时关闭，此特性使其在发动机燃油系统、液压执行回路或涡轮控制回路中，能提供 “故障安全型” 流体 / 气体通路保障。

作为先导式电磁阀，其通过小型先导阀驱动主阀动作，相比直动式电磁阀可承受更高的流量与压力范围，因此适用于中大型工业动力设备场景。产品延续伍德沃德的高耐用性设计，线圈绝缘层具备耐高温性能，金属外壳防泄漏，

可耐受发动机振动、极端温度（常规适用范围 - 40°C 至 125°C）及燃油 / 液压油的化学侵蚀等恶劣工况，确保长期稳定运行。