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原文
Advantages and disadvantages of automatic control valves Operational efficiency and save energy consumption, the use of the automatic control valve is an indispensable part of traditional industry manual valve, pneumatic valve, not on the installation cost and efficiency and electric valve. The sector, said valves in industrial processes, mostly used to control the road and flow of various fluids such as water, oil, chemical liquid, etc., based on the parameters of temperature, pressure and flow. The plant commonly used control valves pressure reducing valve, several types of pneumatic fixed temperature valve, solenoid valve fixed temperature system, the constant temperature system of proportional control valves, temperature control valve. In the selection of various types of automatic valves, you should consider the type of heat, the required accuracy, quality, pressure drop, flow and structure, the failure rate, manufacturers, credit and service and other factors control valve, in order to achieve the economic and practical purposes. On the product itself, due to the electric valve fitted with easy, low failure rate in the industry automation needs of the advantages of the industry more cost-effective choice. Use of conventional pneumatic valve will inevitably have piping, solenoid valve and the compressor can match, while the electric valve is a motor-driven, easy to install, and installation of electric valve can be with the original factory automation line, you can save other costs. In addition, a motor-driven opening and closing smoother without excessive momentum major shortcomings, the failure rate can be greatly reduced. Many people think that your electric valves, the use of high cost, the actual fact, the overall calculation, traditional valves accessories and installation of pipelines, price is not dominant, but to assume more of the maintenance costs.
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译文：
在运作效率及节省能源消耗方面，自动控制阀的运用是不可缺少的一环，传统产业界常用的手动阀、气动阀，在安装成本及效率上均不及电动阀。　　业内有关人士表示，阀类在工业流程上，大多用来控制各种流体的行进及流量，如水、油、化学液体等，所依据的参数有温度、压力及流量等。而工厂常用的控制阀有减压阀、气动式定温阀、电磁阀定温系统、比例式控制阀定温系统、温度控制阀等几种类型。在选用各类自动阀时，应考虑热机的种类、要求的精度、控制阀的品质、压降、流量及其构造、故障率、厂家信用和售后服务等因素，才能达到经济实用的目的。　　就产品本身而言，因电动阀具备装配容易、故障率低以及符合业界自动化需求的优点，是业者较划算的选择。因为使用一般传统气动阀，免不了要有配管、电磁阀及压缩机等才能匹配，而电动阀是以马达驱动，安装简易省事，且电动阀安装配合工厂原有的自控线路即可，可节省其他成本支出。此外，以马达驱动方式开闭较平顺，无瞬间冲力过大的缺点，故障率可大幅降低。　　不少人都认为电动阀贵，使用成本高，其实不然，如果以整体计算，传统阀要加上许多配件及管路安装，价格并未占优势，反而要承担较多的保养费用。

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