译文：
新结构的电/气阀门定位器耗气量较小，如果以定位器耗气量来确定整个控制阀的耗气量，应当采用现今的新颖结构的定位器，其仪表耗气量可低至原来估算的1/2即可。 1 各型号的电/气阀门定位器耗气量 气动薄膜控制阀、气缸阀还是当前世界上主要的执行机构，如果是调节式，还需配定位器，因此电/气阀门定位器耗气量的节能是一个设计中要注意的问题，因为不同的耗气量估算使装置仪表空压机的容量确定相差悬殊，从各种定位器样本看，由于单位不一样，状态不一样，差别很大，从表面看会相差8倍之多，如果100只阀门，供气量会相差很大。 2 完整的耗气量表示法 按工业自动化仪表术语《通用术语》，对耗气量的定义为，耗气量：稳态时，仪表在工作范围内所消耗气体的{zd0}流量。因此完整的耗气量表示法，与供气压力、流量、输出开度等表示方法均有关系。如上海长城CCCX-4000电/气阀门定位器样本所示：单作用执行机构，在140kPa气源压力，输出为50%时，耗气量（标准状况）5L/min。 据了解，浙江某厂曾对现场运行的控制系统用孔板对控制阀耗气量进行测试。(以下数据未经用户核实，仅作参考)。 3 定位器耗气量小的优点与缺点 3.1 节能 控制阀耗气量包括定位器耗气量和执行机构薄膜（气缸）的耗气量。定位器耗气量小必然使控制阀总的动态耗气量小。因此在系统稳定运行时能使供气减少，从而节能。如有100只阀门在稳态时（标准状况），每只定位器1h内耗气量为1m3/h；则总耗气量为100m3/h，而每只定位器耗气量为0.5m3/h；则只用50m3/h；在1m3/h内明显节约仪表空气50m3。 3.2 仪表结构要求高 定位器耗气量小，对定位器的结构与加工精度要求高。这是某些定位器在制造时，为了保证仪表性能而宁可让耗气量大一点的原因。 3.3 定位器耗气量要小 但要保证阀门动作 阀门动作快慢，取决的因素很多。定位器的功率放大器的能力是阀门动作快慢的决定因素。如果定位器耗气量太小，则要考虑是否影响阀门动作速度。特别是大阀门的动作速度。 4 各种结构的阀门定位器都有一个合适的耗气量 从目前的调查看，各种电/气阀门定位器的耗气量均与结构有关。其趋向亦不是耗气量越来越小，而是一个合适的耗气量。从表1可知标准状况下，Fisher DVC500耗气量为300L/h，而发展到DVC600型时耗气量为600L/h，Neles ND800耗气量为800L/h，而发展到ND-900型时耗气量为400L/h。 5 控制阀耗气量要考虑动态耗气量 控制阀结构如图1所示，当控制阀稳态在某一开度时，仅定位器耗气，其耗气量只需考虑定位器的耗气量。当控制阀动作而开度改变时，阀杆上下运动，膜片上下动作，使薄膜室内空气排出，这部分动态的排出气量决定于阀的动作大小及频繁程度，并与薄膜头大小有关，不管使用任何定位器，这部分膜头的耗气量总是一样的。因此控制阀耗气量等于定位器耗气量+执行机构耗气量。特别在开停车时以及系统波动大时，阀门动作大且频繁，薄膜要进气/放气，要考虑足够大的阀门用气，不能因定位器耗气量小而将整个控制阀耗气量估得太小。 从笔者的调查来看，标准状况下，对薄膜式控制阀一般可作如下考虑：原国产控制阀每台耗气按1m3/h估算即可;但随着进口阀门定位器结构的变化，不少阀门定位器在稳态时的耗气量大大低于1m3/h，但由于阀门的耗气量是定位器与薄膜（气缸）的耗气量两者之和，用户可按0.5～1m3/h估算，并针对同一装置内不同阀门定位器的耗气总量计算。仪表气源装置容量计算如下（仪表供气设计规定HG/T20510-2000)：

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原文：
The new structure of the electric / gas valve positioner gas consumption less gas consumption if locator to determine the entire control valve air consumption, should adopt the structure of today's new locator, its instrument air consumption as low as the original estimates of 1 / 2 can be. A different type of electric / gas valve positioner Consumption Pneumatic membrane control valve, cylinder valve or the current world's major implementing agency, if it is adjustable, with locator needed, so electric / gas valve positioner is a design energy-efficient air consumption is necessary to pay attention to the problem, since different estimates of gas consumption meter to enable devices to determine the capacity of air compressor are significant differences between samples from a variety of positioning devices to see, because units do not like the state is not as widely, from the surface will be a difference of eight times, if the 100 valves, gas volume will vary greatly. 2 complete Consumption notation Industrial Automation Instrumentation by the term "general terms", and air consumption is defined as gas consumption: steady state, the instrument within the scope of work the maximum flow of gas consumed. Gas consumption, therefore a complete representation, and the gas pressure, flow, output opening so that the relationship between both methods. Such as Shanghai Great Wall CCCX-4000 Electric / gas valve positioner sample as follows: single-acting executive body, in the gas supply pressure of 140kPa, the output of 50%, the air consumption (standard conditions) 5L/min. It is understood that the scene had to run a factory, Zhejiang, the control system of the control valve with orifice gas consumption test. (The following information without the user's verification, only for reference). 3 locator advantages and disadvantages of small air consumption 3.1 Energy Control valve positioner gas consumption and gas consumption, including the executing agency films (cylinder) in gas consumption. Consumption of small locator must make the overall dynamics of control valve air consumption small. Therefore, the system can supply a stable reduction in run time, thus saving. If the valve 100 in the steady state (standard state), each locator 1h in air consumption of 1m3 / h; then the total gas consumption of 100m3 / h, while the gas consumption for each locator 0.5m3 / h; then only 50m3 / h; at 1m3 / h within the obvious savings instrument air 50m3. 3.2 meter structure requires a high Locator gas consumption is small, the structure of the locator and processing of high precision. This is a locator in the manufacture of some, in order to ensure the instrument performance and prefer to let Consumption bigger reason. Air Consumption 3.3 locator is smaller, but to ensure that the valve action Valve movement speed, depending on many factors. Locator valve power amplifier's ability to fast and slow movements of the deciding factor. If the locator gas consumption is too small, will have to consider the impact of valve movement speed. Especially large valve movement speed. 4 a variety of structural valve positioner has a suitable air consumption From the current investigation to see, all kinds of electric / gas valve positioner of the gas consumption are related to structure. Of its gas consumption trend is not getting smaller and smaller, but a suitable air consumption. We can see from Table 1 under standard conditions, Fisher DVC500 air consumption is 300L / h, while the developed to the DVC600 model, when gas consumption is 600L / h, Neles ND800 air consumption is 800L / h, while the developed to the ND-900 type, when gas consumption is 400L / h. 5 control valve air consumption should be taken into consideration Consumption Control valve structure shown in Figure 1, when the control valve opening at a steady state, only the locator gas consumption, gas consumption only consider the location of its gas consumption device. When the control valve movements of the opening changes, the stem up and down movement, diaphragm moves up and down, so that film indoor air discharge, this part of the dynamics of the discharge valve of the gas determined by the size and frequency of movement, and with the size of thin film head, regardless of the use of any locator, this part of the film the first of the air consumption is always the same. Hence, the control valve air consumption is equal to the executing agency locator Consumption + air consumption. Especially in the open parking volatile time and the system when the valve moves large and frequent film to enter the gas / gas release should be considered large enough gas valve can not be due to the small locator Consumption Consumption entire control valve estimated too small. From the author's survey, the standard conditions, for thin-film-type control valve is generally considered as follows: The original domestic control valve for each gas consumption by 1m3 / h can be estimated; but with the inlet valve positioner changes in the structure, Many valve positioner in the steady state air consumption significantly lower than 1m3 / h, but because of the valve air consumption is a locator with the film (cylinders) and Consumption of both worlds, and, the user can be 0.5 ~ 1m3 / h estimates, and for the same device in different valve positioner device calculated the total gas consumption. Instrument gas supply capacity is calculated as follows (instrument air supply design requirements HG/T20510-2000):