The quality and application safety of safety valve have an important impact on the continuity of production and its safety. With the development of relevant rules, there is a certain standard for the use of safety valves. However, in practice, non-standard applications are still relatively common. In order to ensure the safety of the production, the verification and overhauling of the safety valve has become an important work to be done in the production process. The timely detection and treatment of the problems existing in the verification can effectively avoid some unnecessary economic losses. This article starts from the common problems in the verification and repair of safety valve, and discusses the common processing methods in practice based on the analysis of the causes of the problems. This article by the Shanghai Five Valve Manufacturing Co., Ltd. reproduced share, Shanghai Wuyue is a professional manufacturer of safety valve, the main production of various types of spring-loaded safety valve, pilot-operated safety valve, and life-long use of related units to provide technical support. 1 safety valve calibration and maintenance of common problems Safety valves are used in many forms in boilers or power generation equipment. In order to ensure the safety of their application and the normal operation of equipment, we must regularly check and repair them. In the calibration and maintenance, we found the safety valve often the following problems: Some companies use non-standard safety valve. These safety valve is a regular manufacturer of safety valves without national certification, or the use of some from the waste after the restructuring of the safety valve, which makes it in use there are many problems and potential safety problems. The use of this non-standard safety valve first makes the product model and physical specifications do not match. Safety valve in the production process, without national certification, will make its choice of materials is not strictly in accordance with the relevant provisions of the implementation, so that the size of the product does not match the size of the cavity. Internal valve adjustment ring and other components there will be some non-standard phenomena, making the safety valve can not play its due role. The material used to seal the sealing surface of the safety valve in the device does not match its type. In the calibration and maintenance practice, we see the more serious phenomenon is the safety valve in the manufacturing process is completed without any test and test will enter the market, there are more serious quality problems. Some businessmen in pursuit of economic efficiency, regardless of their quality of the impact on production safety, the use of inferior quality safety valve, making it possible in the application of safety valve rupture or damage. 2 safety valve analysis of the causes of common problems For the safety valve calibration and repair some common problems in the process, the main reasons are the following aspects: First, there is some erosion and wear due to leakage. During the operation of the safety valve, the sealing between the valve disc and the valve seat of the safety valve is reduced due to the erosion caused by some gaseous medium and the scratches caused by the abrasion, or due to the multiple grinding of the valve core Significantly reduce the hardness of the sealing surface, or the sealing surface cleanliness caused by low disc and valve seat clearance, so that leakage can be stored in the sealing surface, resulting in damage to the safety valve. The existence of these corrosive factors make the safety valve sealing reduced, and thus can not work properly. Second, the normal application of safety valves, such as exhaust gas, that can not be normally opened under the specified pressure conditions causes damage. In the process of its operation, the safety valve without regular manual or automatic experiments, it will be applied to the production, it may bring safety valve disc and valve seat due to the accumulation of scale and so on, or To be blocked, so that it is corrosive. The safety valve opening pressure set unreasonable, some of the selection of verification units and the development of standards are inconsistent and so will have an impact on the normal application of safety valves, so that the quality of their work and life appear inconsistent with the standards, reducing its Sensitivity and flexibility. Third, the phenomenon of exhausting some of the non-specified pressure also reduces the safety valve performance. In practice, exhaust pressure will have a direct impact on the safety valve start-up, etc., adjust the opening pressure or some parts of the loose and so may cause safety valve exhaust advance. In the absence of safety valve calibration will be applied to the production equipment, the pressure level in its use, etc. will have an impact on its service life and in use of security. Finally, the safety valve can not be seated after take-off or some frequency hopping phenomenon is a common safety valve failure factors. Through the back seat pressure control to ensure safety valve seat back tightness, put this pressure is too low, will make the valve flap closing time corresponding delay, thus undermining the sealing surface, and the back seat pressure is too high Will make the safety valve in a state of frequent opening and closing, adversely affecting its normal operation. 3 for the safety valve calibration and maintenance of the problem handling In order to ensure the normal application of safety valve, in practice, we should deal with the problems encountered in calibration and maintenance timely. First, for safety valve models and products do not match the phenomenon, by replacing the standard safety valve to ensure its normal operation. For some materials can not guarantee the safety valve, from the perspective of equipment operation needs, in strict accordance with the provisions of national standards, with the choice of qualified enterprises produced by the national test found that products. Timely replacement of substandard products to avoid follow-up work may occur in the machine failure or production safety issues. Second, effectively solve the problem of corrosion. Through the calibration and maintenance work carried out in a timely manner to find the safety valve in the face of the corrosive dangers of the valve flap and the valve to save the scale or oil and other timely clean-up, and regular inspections to ensure that their work environment Clean, thus avoiding the corrosion caused by the safety valve in use. Third, for safety problems caused by the exhaust valve damage, the state of its pressure and exhaust methods to check, to reduce the destruction of the exhaust. In the calibration of the kind of due to pressure caused by the exhaust fault, the safety valve to conduct a comprehensive inspection and analysis of the working environment, the theory of its internal pressure structure and its exhaust path, so that the internal pressure can be discharged according to a certain order Reduce the pressure exhaust on the safety valve damage, thereby enhancing its quality of use. Fourth, a comprehensive analysis of the use of safety valve to take a variety of ways to exclude the use of safety valve failure. In the inspection and maintenance, we will find a variety of problems in the use of safety valve, in order to ensure the normal operation of the safety valve, we must proceed from its application environment, analyze the causes of its failure to take targeted control measures. Comprehensive use of lower than the disc cleaning, valve seat welding, so that it is in a relatively stable environment, to ensure that they can play a role in the application. In the verification, for substandard quality or to meet the scrap standard safety valve, in strict accordance with the relevant provisions of the replacement work, to ensure that the safety valve used to meet the actual production quality needs, so that it can work better. Comprehensive application of a variety of technology to safety valve calibration and repair, to a great extent to improve the life of the safety valve and the quality of the system applications, in order to achieve the goal of maintenance inspection. 4 Conclusion The quality of the safety valve has an important impact on the sealing, etc., thus affecting the overall operation of the equipment. In practice, safety valve through the regular inspection and maintenance, safety valve in time to find some of the problems and take effective measures to reduce its harm to a minimum. This production safety and continuity of the guarantee, starting from the choice of safety valve, according to the characteristics of the system to choose to meet the needs of the material safety valve, and the safety valve sealing standards such as a certain test to ensure that its application results. At the same time, in the choice of safety valve, strict compliance with relevant technical standards, select the level of national safety valve to ensure its quality and application of the effectiveness. In the verification, the safety valve in time to find some of the quality and hidden dangers at work, starting from the phenomenon of in-depth analysis of the reasons to determine the safety valve failure parts and specific reasons. Based on the analysis of reasons, take effective targeted measures to deal with some of the safety valve in time to make it back to normal operation. For some due to internal pressure of the system caused by the safety valve failure and the use of life to reduce the problem, we must proceed from the system as a whole, the system components and the pressure structure accordingly adjusted so that the exhaust In accordance with the order of a certain pressure, the use of safety valves to provide a good environment, to ensure its service life and quality. NMN For Facial,Nicotinamide Mononucleotide,Nmn for Anti-Aging and Skin Care,CAS 1094-61-7 Nmn Changshu Enzyme Biotechnology Co., Ltd. , https://www.nmnglutathione.com
Safety Valve Verification and Maintenance Problems and Solutions
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