The load method of the system is that installing a throttle ahead of a proportional overflow valve, and the throttle can prevent the effect of the pressure impulsion upon sensors and meters.
Fortunately we were able to shut off a valveahead of the leak and the pilot got us home safely.
幸运的是，我们关闭了泄露油箱的阀门，飞行员把飞机安全飞回。
3
The installation of a strainer ahead of the backflow preventer is recommended to prevent fouling of the check assembly and resultant spillage from the valve during repressurizing.