导阀可在主阀以外单独调定开启压力和关闭压力。
Pilot valve can adjust lift and close pressure solely out if main valve.
他厌倦了压力，关闭基金。
关闭供应压力和排泄阀门。
关闭供应压力，观察浮子下降，因此开启。
Turn off supply pressure and observe float drop to open air inlet.
通过空气气压力开启关闭电源，确保用电安全；
Turn on/off the power by air pressure to ensure the electrical safety;
在没有任何管道压力状态下开启和关闭阀门几次。
Stroke the valve open and closed several times, with no line pressure.
当压力恢复到安全值时，泄压阀自动关闭。
When the pressure to a safe value, the pressure relief valve closes automatically.
当压力恢复到安全值时，泄压阀自动关闭。
When the pressure to a safe value, the pressure relief valve closes automatically.
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