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原文
Flow control valve works: Digital flow control valve spool its structure is automatic, manual valve, and display components. Show some movement by the flow control valve, sensors send information, electronic calculator display parts. Its job is to its complex. The measured flow through the valve, the impact of traffic movement within the water impeller, the impeller rotation sensing device and sensing sender, so that the sensor is proportional to the telecommunications issue with the flow number, flow through the wires into the electrical signals of electronic calculators, calculated computing devices, microprocessor-treatment, the flow rate value is displayed. Manual valve is used to regulate traffic, according to the displayed value to set the desired flow rate value. Automatic valve is used to maintain constant flow, that is, the pressure in the pipe network changes, the automatic pressure valve will automatically open under the effect of a small fire off to maintain the set flow valve port value unchanged.
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译文：
流量控制阀的工作原理：数显流量控制阀其结构是由自动阀芯，手动阀芯及显示器部分组成。显示部分则由流量阀机芯、传感器发讯器、电子计算器显示器部分组成。它的工作是及其复杂的。被测水流经阀门，水流冲击流量机芯内的叶轮，叶轮旋转与传感发讯器感应，使传感器发出与流量成正比的电讯号，流量电讯号通过导线送入电子计算器，经过计算器计算、微处理器处理后，其流量值显示出来。手动阀芯是用来调节流量的，根据显示值来设定所需的流量值。自动阀芯是用来维持流量恒定的，即在管网压力变化时，自动阀芯就会在压力的作用下自动开大火关小阀口来维持设定流量数值不变。

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