The performance of the control valve directly affects the control quality of the control system, thus affecting the product quality and the economic benefits of the enterprise. If you can not find the control valve fault and be ruled out in time, or the control valve neglect management, ignoring the control valve on the economic benefits of enterprises, but only in the event of a serious fault or accident attention, is bound to corporate The normal operation has a serious impact, causing incalculable losses. A modern process control plant uses hundreds or even thousands of control valves as actuators for automatic control systems to control various process parameters such as flow, pressure, temperature, and liquid level in the manufacturing process. To strengthen the control valve maintenance and management, to maintain the best state of the control valve and performance of modern enterprises to achieve an important factor in the management of fine. Improve the control valve maintenance and management, it is recommended to start from the following three aspects, in order to gradually reduce the production costs of enterprises laid the foundation. Establish regular maintenance inspection mechanism At present, in most cases, we judge the existence of control valve hidden problems based on the senses and experience to decide whether to maintain the valve repair. However, due to the limitations of human sensory functions and experiences, many control valve failures, especially hidden faults, are not easily detected and the valve still seems to be in normal working condition. In fact, the seemingly normal valve, a considerable part of the existence of a variety of hidden faults, and even dangerous hidden faults. The root cause of control valve failure is due to the valve for a long time under a variety of factors, and the impact of these factors on the valve results are constantly changing and cumulative superposition. The impact of instability to develop to a certain extent, it will be instantly reflected in the failure. Therefore, an instantaneous valve failure is the result of "damage accumulation process" after a certain period of time under the influence of various factors. Facts have shown that if the valve after the failure to take repair remedial measures, not only increased maintenance costs several times, several times, and the impact on business production is far greater than preventive maintenance. Accidents caused by valve failure or parking can even incur immeasurable damage to the enterprise. If the gradual damage to the valve process, that is, before the failure, the establishment of regular testing repair mechanism, regular preventive maintenance valve damage, timely detection and repair of minor damage before the failure, you can avoid the failure of the formation, Valve failure on the impact of corporate production to a minimum. Using the correct maintenance process control valve failure in the control system failure occupy a large proportion. Analysis of the control valve to determine the failure of technical managers regular work. Therefore, the correct analysis to determine the cause of the control valve failure, using the correct process to repair the control valve is essential to improve maintenance efficiency. Different quality control valves, the frequency of failure and failure causes will be very different. Control valve working conditions are more complex, so the control valve fault phenomena varied. In general, there are four main types of control valve failure: incorrect selection, improper installation, defective use, and fatigue damage. Various instrument accessories control the work of the control valve. Therefore, a variety of reasons may lead to the same valve failure. Caused by the common control valve filler leakage or valve leakage reasons, there may be dozens. Therefore, in the failure analysis to avoid headaches, feet and feet, labor and powerless. Failure to do so will result in the recurrence of the same failure in the short term, culminating in valve quality problems, replacement of new valves and unnecessary waste. In general, for high-quality control valves, failure may occur shortly after use, often due to mis-selection, improper installation, improper use caused. With this type of failure, the problem can be resolved quickly with just a few parts or even without any parts, as long as the cause is corrected. The long-term control valve after the failure occurred, usually due to fatigue damage caused by the valve parts. Timely detection of faults, to be properly repaired, will be able to extend the life of the control valve at a lower cost. Practical experience, due to reasonable maintenance, so that high-quality control valve in harsh conditions normal work for decades of examples are not uncommon. If there is "the control valve is not repaired to be better, the more repair the worse" phenomenon, it is recommended to check the control valve repair process and methods, as well as spare parts application is there any problem. Repair process or method is inappropriate, will destroy the original parts of the original geometry, physical state and the correct valve assembly state, accelerate the damage to parts and bring disaster to other valve parts. A high quality control valve may work less than a year in equally complicated and harsh conditions and may work for decades. This depends on how the control valve is maintained and managed. Practice shows that exactly the same control valve in exactly the same conditions, as different managers use different maintenance and maintenance measures, the results are very different. Modern science and technology to achieve maintenance changes Modern science and technology development, especially the in-depth development of computer technology for the modern enterprise management, equipment management, control valve maintenance and management has provided unprecedented advantages, the scientific control and maintenance of the control valve Possibly, it provides the necessary conditions for the fine management of enterprises. The so-called "smart valve positioner" has not only played a simple role of "positioning", but with more important valve status monitoring, fault diagnosis, equipment management functions. It makes the valve running status, changes in performance and other unobstructed view, and by e-mail or mobile phone abnormalities of the control valve as soon as possible to report to the managers, in order to develop timely response measures to avoid losses. The practice of users at home and abroad proves that the latest maintenance technology based on this advanced diagnostic technology can shorten the parking time, correct control deviation, eliminate unplanned parking, save maintenance costs, reduce labor intensity, avoid over-repair and blind inventory, and optimize safety Inventory, reduce production costs, improve economic efficiency. It should be pointed out that the current "smart locator" application is very popular. Many process control plants are using the new valve controls manufactured by top control valve manufacturers. In most cases, however, its role is still limited to its use as a "locator" without taking full advantage of its more powerful and comprehensive troubleshooting, operational monitoring, and equipment management functions to improve equipment management, eliminate unplanned parking, For enterprises to create greater efficiency. This can not be said to be a waste of resources. With the continuous development and popularization of advanced diagnosis and maintenance technologies, the traditional way of overhauling and managing control valves is bound to undergo tremendous changes.
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