通过这样的新型结构——在阀芯上增加反馈腔，使其调压偏差不超过10%。

Through the new structure of adding feedback cavity on valve core, adjustment windage is less than 10 percent.

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阀芯的轴向运动则由两端阀腔的静压力推动。

While the linear motion is actuated by pressure difference of two end spool chamber.

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当线圈断电时，先导阀芯靠弹簧复位，先导孔关闭，阀腔由活塞节流孔增压和复位弹簧的推力，电磁阀关闭。

When the coil power, the pilot valve by the spring return, pilot hole closed throttle valve chamber pressurized by the piston return spring and thrust, the electromagnetic valve is closed.

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