The sealing of high-pressure globe valves
In the production process of the high-pressure globe valve, in order to ensure the safety of its use, the technicians will reasonably select the sealing material, usually a metal, which can make the globe valve well sealed when it is closed. In this process, technicians should take measures to continuously improve the machining accuracy of the sealing surface and strengthen the control of the axial sealing force so as to continuously improve the production quality of the high-pressure globe valve. However, in the process of controlling the axial sealing force, the staff must be clear that the great axial sealing force is not the best. According to the research, some people believe that the high-pressure globe valve should be sealed by plastic methods, that is, in the actual production process, using the plastic deformation of soft materials to continuously improve its production quality and the sealing effect. In addition, since the roughness of the sealing surface will also have a certain influence on the axial force, in order to reduce the influence of other factors on the production quality when producing the high-pressure globe valve, the technician must strengthen the control of the molecular diameter of the medium, which can prevent the occurrence of other problems caused by the quality and accidents.
The sealing of the check valve
In the specific working process, the check valve is generally used under high temperatures and temperature fluctuation conditions, so it is easy to lead to the occurrence of failures caused by sealing in the actual working process. In order to strengthen its use, technicians have analyzed and studied the failure of flange seals and other issues. Use finite element simulation to analyze the sealing performance under different internal pressure operating conditions.
According to the analysis of the research results, it is found that with the increase of the medium pressure, the stress on the ring will also gradually increase. If it is not controlled at this time, its sealing performance will be reduced, which will cause serious damage to the safe use of the check valve. At the same time, in order to avoid the influence of this factor on the check valve, the technicians also used the transient temperature field to conduct a comprehensive research and analysis of the temperature fluctuation conditions in the actual production process, and further improved the quality of the check valve.
The sealing of low-pressure gate valves
In the production process of the low-pressure gate valve, there are certain advantages in the industry due to the price and technology, so it has been used in the actual industrial production process. However, when designing the low-pressure gate valve, since it has two sealing surfaces, sealing problems are prone to occur in this process. Therefore, if the technicians want to prevent these factors from affecting the quality of the low-pressure gate valve, they must strengthen the research on its production process. In the production process, the medium temperature is not higher than 25 degrees Celsius, which can not only improve the processability, but also make up for the lack of the angle of the sealing surface and ensure the accuracy of production parameters. Because in the specific production process of low-pressure gate valves, deviations will occur in the processing process due to the influence of some objective factors, and its sealing surface can only be sealed by the medium pressure. Therefore, in the actual production process, technicians should rely on the medium’s pressure to press the sealing surface of the wedge to prevent the occurrence of sealing problems based on the actual production situation. When the gate valve is opened, if its wedge lift height is 1:1, the fluid passage is completely unblocked.
In this process, technicians should also pay attention that this position cannot be monitored. Therefore, the apex of the valve stem is mainly used as a sign in order to ensure the safety of the low-pressure gate valve in actual use, and the temperature change must be considered. The apex of the valve stem is mainly used as a sign, and the influence of temperature changes on the production of low-pressure gate valves should be considered to avoid the occurrence of blocking. Therefore, in order to effectively prevent the occurrence of problems such as sealing, the fully open position of the valve can be determined according to the position of the wedge, and the temperature control should be strengthened. In the application of low-pressure gate valves in liquefied natural gas and other engineering processes, if the liquid low-temperature medium is output at this time, it will cause problems such as flammability and explosion. At the same time, when selecting the material for the LNG valve, the technician must choose the material of the low-pressure gate valve reasonably according to the actual situation, and conduct a comprehensive inspection of it. In the inspection process, if the material is found to be unqualified, it must be dealt with. Otherwise, problems such as leakages of the shell and sealing surface will occur, and in severe cases, the leakage of the medium will cause an explosion. Therefore, in the process of developing and designing low-pressure gate valves, technicians must strengthen the quality control of materials in order to prevent the occurrence of sealing problems.
