原文：
　          调节阀是自控系统中的执行器，其应用质量反映在系统中的调节品质上，调节阀应用的好坏，即应用质量与三个方面有关： (1)正确选型(含计算)——系统设计人员； (2)产品质量——生产厂 (3)正确安装、使用、维护——用户。 所以，我们讲质量不只是生产厂的问题，平衡阀它是一个广义的概念，包括系统设计人员、生产厂家和使用人员。

 下面列举常见的应用问题，这些问题若能很好地处理，可以说你选阀就不会出现大的质量事故。

 (1)口径计算――小了不能满足Qmax，电站阀门大了常小开度工作，调节性能差，寿命短。

 (2)校核关闭时的△P――有些根本就不作校核，造成阀关不死，打不开。

 (3)校核可调比R――R小了不能满足流量变化范围。

 (4)确定弹簧范围――涉及弹簧范围、启始工作压力、输出力、稳定性、调整等。

 (5)材质与结构――这里学问最大，一个优秀的工程设计人员， 所选的阀结构和材质应是在满足使用功能前提下，得到的是简单的结构、最低的价格 相反，花了很多钱，甚至引进产品，还是用不好，这种费用可差20～30倍。 用不好的影响则更大，开开停停，造成经济损失和产量下降，有的甚至无法投用。 因此，一个有经验的系统设计人员就知道阀在现场的重要性，一开始就重视阀的正确选型，并与我们密切配合。

 (6)附件----对主体的保证和有意的补偿。

 也有很多成功的例子，成功首先在于他们的正确选型。氧气专用阀、铜阀门这些例子都是笔者亲自经历的：

 (1)化八院——选用的耐盐酸调节阀，因所选阀型和材料恰当，已使用两年以上。

 (2)化六院与沙市农药厂精细化工工程，多种物质混合成的强腐蚀性介质，该阀1993年投用至今正常。

 (3)化四院选用烧碱专用阀，眼镜阀克服了烧碱蒸发系统高温浓碱腐蚀与堵卡问题。

 (4)化八院与内蒙吉兰泰化工项目——水处理(脱盐水)系统，以往无论国内外装置均用衬胶蝶阀或隔膜阀，阀一直用不好。 该厂改引进隔膜阀用我们为之专门设计的水处理阀后，阀已运行了两年多。 类似的还有云南氮肥厂。

 (5)核动力设计院——选用高温高压、0.2秒紧急动作阀，保证了试验装置运行。

 (6)成都化工厂――湿氯气调节，原为美国阀，电动阀门执行器选用氯气专用阀后，实现了国产化。

 (7)什邡化工总厂――346工程选用磷铵专用阀，投运两年多正常。

 (8)红光化工厂――98％浓硝酸，选用全四氟耐蚀阀，1992年至今运行正常。

 (9)云南氮肥厂――磷酸及混和介质，选用耐腐蚀球阀代替预先准备进口的产品，产品从1992年至今运行正常，还节约10多万美元。

 (10)武钢――技改选用微压力自力式阀，解决了炉膛50mmHzO的超低压稳定问题。 举例涉及的问题和成功的例子，目的在于证明选型的重要性和技术处理的价值，以引起对调节阀选型的足够重视。

“ Control Valve Selection and Application of the working conditions in the case analysis ”是由中国闸阀网提供的阀门行业新闻，译文仅供参考。另外，中国闸阀网还提供相关产品搜索： 电动闸阀、 手动闸阀、 气动闸阀、 不锈钢闸阀、 美标凸耳闸阀等。

译文：
           Control valve is controlled actuator system, the application of quality is reflected in the quality system regulation, the control valve applications, good or bad, that application quality with three aspects: (1) the correct selection (including prices) - the system designer; (2) Product quality - plant (3), proper installation, maintenanceSafety valves - the user. Therefore, we stress on quality and not just a plant problem, which is a broad concept, including system designers, producers and use of personnel. The following list of common application problems if handled well, can say that you choose will not be a big valve quality accidents. (1) the method of calculation - small and can not meet the Qmax, a very small opening large work adjustment poor performance, short life. (2) checked off the △ P - some simply do not make check, resulting in valve related death, and not open. (3) Check adjustable than the R - R can not satisfy the smaller range of discharge. (4) of the spring range - involving Reducing Valvesthe spring range, Kai began working pressure, output power, stability and adjustment. (5) The materials and structure - the biggest learning here, an excellent engineering staff, Valve structure and materials selected should be the premise of meeting the use of features, get a simple structure, the lowest price Instead, spend a lot of money, and even the introduction of products, or with bad, this cost can be 20 to 30 times worse. Impact is even greater with the bad, to open to open the stop, resulting in economic losses and decline, and some can not even put into use. Therefore, an experienced system designers know the importance of valves in the field, the start valve in the correct Plug Valvesselection of great importance, and closely with us. (6) Annex ---- guarantees and deliberate on the subject of compensation. There are many successful examples of their success lies first and foremost the right selection. These examples are the author personally experienced: (1) of eight homes - use hydrochloric acid-resistant valves, valve type and materials for properly selected, used more than two years. (2) of six homes and Shashi fine chemical pesticide plant project, a variety of material mixed into the strong corrosive medium, the valve is put into use in 1993, has normal. (3) of four hospital-specific valve used caustic soda, caustic soda evaporation system to overcome the high concentration of alkaline and lay a trap question. (4) of 8 homes and 内蒙吉兰泰 chemical projects - water treatment (desalination water) systems, both domestic and foreign installations in the past, with a rubber lined butterfly valve or diaphragm valve has been used well. The plant with whom we change the introduction of diaphragm specially designed water valve, the valve has been running for over two years. Also similar to nitrogen fertilizer plant in Yunnan. (5) Nuclear Power Design Institute - Balance Valvesuse high temperature and pressure, 0.2 second emergency action valve, ensure the test equipment operation. (6) Chengdu Chemical Plant - wet chlorine gas regulator, formerly the United States valves, special valves after use of chlorine to achieve a localization. (7) Shifang Chemical Plant - 346 works selected AP special valve, put into operation more than two years normally. (8) red light chemical plants - 98% concentrated nitric acid, used all PTFE valve corrosion resistance since 1992 to run properly. (9) nitrogen fertilizer plant in Yunnan Province - phosphoric acid and mixed media, use corrosion-resistant ball instead of pre-prepared products imported products since 1992 toAPI Cast Steel Valves run properly, also saving more than 10 million. (10) Wuhan Iron and Steel - Rehabilitation Self-selected micro-pressure valve, to resolve the furnace 50mmHzO ultra-low-voltage stability. For example, the issue involved and successful examples, the purpose is to demonstrate the importance of selection and technical processing of value, causing the regulator valve on the selection of adequate attention.

原文来源：http://www.1zhafa.com/

2010-09-02 08:35

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