原文：
           自力式压力调节阀因为不需要其它外来能源如电源、气源，仅靠介质自身的能量来驱动，既节能又环保，使用方便，安装完毕后设定好压力值即可投入自动运行，所以在对控制精度要求不高，又缺乏电源、气源的场合，得到了越来越广泛的使用。 不过，这种阀门也需正确选型和正确安装、使用，才能保证投入运行后不出现什么问题。选型方面就不用多说了，比如调节阀是用来控制阀前压力还是阀后压力，介质是常温还是高温，有无腐蚀性，最高工作压力等等，一定要事先搞清楚，旋塞阀我们主要谈谈安装使用方面的问题。因为我最近碰到一例自力式压力调节阀的使用方面出现的问题，很有代表性。 阀门是用在蒸汽管道上的，投入使用才短短一两个月，电磁阀用户就报修。到现场一看，大量蒸汽从调节阀膜头的排气孔中排出，噪声极大，声势惊人。事故原因，明显是蒸汽没经过冷凝，直接进入膜头，烧坏了膜片。 用于蒸汽管道的自力式压力调节阀，安装时必须在执行器和管道之间加一个冷凝罐，不能让蒸汽进入执行器膜头，而且，调节阀必须头朝下安装，冷凝罐要高于膜头，初次使用，一定要将冷凝罐和膜头中加满水。看现场的安装方式，柱塞阀询问现场仪表人员，这些都没问题，那么是什么造成的呢？令人百思不得其解。

        后来，仔细询问了一个操作工，无意之下得知：这台阀门安装、投入使用后，隔膜阀冷凝罐和膜头之间的铜管接头一直在断断续续地漏水。原来是这样，漏水导致冷凝罐里的水慢慢漏光，蒸汽就进入膜头，烧坏了膜片。 由此可见，自力式压力调节阀在蒸汽管道上使用时，疏水阀 安装、维护方面一定要多加注意，为保证调节阀正常运行，千万不能让接头漏水，不能让冷凝罐缺水，要定期检查，适时加水。其实，不光是自力式压力调节阀，就是其它的自力式调节阀，在使用时也需注意维护和保养才行。 另外，蒸汽压力如果较高，最好选用活塞式执行器，而不取薄膜式执行器，因为膜片一般能承受的压力不超过0.4Mpa，过此虽然能用，却要大大降低使用寿命。

“ Self-pressure regulating valve used ”是由中国调节阀网提供的国际阀门新闻，译文仅供参考。另外，中国调节阀网还提供相关产品搜索： CV3000调节阀、 电动调节阀、 执行器和附件、 更多调节阀产品、 调节阀价格等。

译文：
        Self-pressure regulating valve because no other external energy sources such as power, gas supply, relying on the media's own energy to drive both energy saving and environment-friendly, easy to install after setting the pressure value can be input automatically, so inSafety Relief Valves the control less precision, the lack of power, gas source of the occasion, been more widely used. However, this valve also need the correct selection and proper installation, use, put into operation to ensure that any problems do not occur. Needless to say the selection of aspects to such control valve is used to control valves or the valve before the pressure of the pressure medium is a normal temperature or high temperature,Needle & Gauge Valves with or without resistance, the maximum working pressure, etc., must first find out, we mainly discuss On the installation problems. I recently encountered one case of self-pressure regulating valve problems in the use of, very representative. Valve is used in the steam pipe, and put into use until a month or two, the user repair. To the scene and saw a large number of steam control valve membrane from the head in the exhaustBalance Valves vent, a great noise, alarming momentum. Cause of the accident, obviously did not read the condensation of steam directly into the membrane head, burned the diaphragm. For steam pipes Self-pressure regulating valve must be installed between the actuator and channels plus a condensation tank, can not let the steam into the membrane actuator head, and, control valve must be installed upside down, condensation can be higher than film head, the initial use, be sure to head condensation tank and the membrane filled with water. See site installation, ask live instrumentation personnel, Instrument Manifolds these no problem, then what is causing it? Baffling. Later, asked in detail about an operator, do not intend to learn under: This sets the valve installation, put into use, the condensate tank and the membrane between the brass head joints have been leaking intermittently. The original is the case, leading to leakage of water slowly leakedInstrumentation Ball Valves condensate pot, steam enters the film first, burn the diaphragm. Thus, self-pressure regulating valve used in the steam pipe, installation, maintenance must be addressed in order to ensure normal operation of control valve, do not allow joint leaks, condensation can not be allowed to dry, should be regularly checked and timely water. In fact, not only is the self-pressure regulating valve, is that other Self-regulating valve, also need attention in the use and maintenance Caixing. In addition, if a higher vapor pressure, the best choice of piston actuator, rather than an diaphragm actuator, because the pressure diaphragm is generally no more than 0.4Mpa, can be used over this though, have to greatly reduce the service life.

原文来源：http://www.1tiaojiefa.com/

2010-07-26 07:29

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