【Major Chemical Equipment】074-DN600 Extra-large Diameter P91 Material Y-Type Globe Valve
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The past decade has been a period of rapid development for China’s chemical industry, marked by the emergence of many new processes, products, and equipment. There has also been significant progress in China’s chemical processing equipment, which has contributed to the swift advancement of the petrochemical sector. Here, we have compiled some of the achievements and breakthroughs made by Chinese equipment manufacturers in terms of larger-scale production and greater use of domestic equipment. We invite everyone to share their insights and engage in discussions, to cheer for Made in China and to support the development of chemical processing equipment! *********************************** In September 2018, the large-diameter Y-type stop valve developed by China National Nuclear Technology was successfully delivered to the customer for use. This valve has a nominal diameter of DN600 and a pressure rating of 1500 LB; it is entirely made of F91 material, and it represents the largest-diameter Y-type globe valve produced by China National Nuclear Corporation. During the development and production of these valves, departments responsible for technology, quality, and production at China National Nuclear Corporation worked closely together to overcome various challenges, delivering the valves to the customers as required. At present, the installation of these valves on site is progressing smoothly.
More people are welcome to participate in the relevant discussions. Click on the blue link to access it: The 【Haichuan Equipment Guessing Game】 series is being updated continuously in 2022; all Haichuan community members are encouraged to join in! https://bbs.hcbbs.com/thread-2079686-1-1.html (Source: Huahai Chuanliu – Haichuan Chemical Industry Forum) Summary post on the series 【Major Equipment in the Chemical Equipment Industry】 https://bbs.hcbbs.com/thread-3312079-1-1.html (Source: Huahai Chuanliu – Haichuan Chemical Industry Forum) Summary post discussing the components of cracking furnace equipment for 【Ethylene Cracking】 https://bbs.hcbbs.com/thread-3308724-1-1.html (Source: Huahai Chuanliu – Haichuan Chemical Industry Forum)
Such a large diameter is likely used for the main steam pipes in power plants.
Yes, it should be developed first for HDZ
In 2018, China National Nuclear Technology Corporation carried out the 2018 version design of high-pressure globe valves as well as projects for optimizing the structure of such valves, as part of its efforts to optimize the design of standard product series. The 2018 version of the high-pressure globe valve design represents an overall upgrade from the previous 2012 version, aimed at meeting new design standards and satisfying market demands. During this process, due to the many differences between the old and new standards in terms of scope, valve seat diameter, minimum valve stem diameter, etc., Li Taiping conducted careful comparisons and incorporated the concept of \"equal strength design\" into the entire design process. Guided by this approach, he proposed the concept of \"equal margin design,\" transformed past design experiences into textual or mathematical expressions, and redefined the criteria used for strength verification. He established uniform upper and lower limits for these criteria, ensuring consistency both in terms of structure and stress. At the same time, the currently popular analysis and design tool ANSYS is used to simulate the overall static behavior of the valve as well as the flow conditions of the fluid, thereby further ensuring the safety and cost-effectiveness of the valve. In the structural optimization of high-pressure stop valves, China National Nuclear Corporation standardized the structure of high-pressure Y-type stop valves, and also maximized the consistency in the structures of Y-type stop valves, T-type stop valves, and check stop valves. This reduced the number of standard drawings, which helped to lower manufacturing costs. Additionally, all these valves were designed based on nominal pressure, thereby expanding their operating range and improving their cost-performance ratio. \"Structural Optimization of High-Pressure Y-Type Stop Valves\" won the Third Prize for Technical Progress in 2018.
A bidirectional sealing butterfly valve comprises a valve body, upper and lower valve stems within the valve body, a valve seat located inside the valve body, a disc plate mounted within the valve body, and end caps. One end of the upper valve stem extends outside the valve body while its other end is connected to the disc plate inside the valve body. One end of the lower valve stem is fixed in conjunction with the end caps. What sets this valve apart is that the other end of the lower valve stem is connected to the disc plate via a key. The valve seat is arranged obliquely on both the upper and lower sides of the valve body; the outer peripheral surface of the valve seat serves as the sealing surface. The outer peripheral surface of the disc plate fits into the obliquely positioned sealing surface of the valve seat. The outer peripheral edge of the disc plate is shaped into a ring-shaped groove structure, within which a seal is installed. This seal makes linear contact with the obliquely positioned valve seat. The bidirectional sealing butterfly valve resulting from this invention features a small number of components, a simple assembly process, which saves time and materials; it also enables reliable bidirectional sealing
This valve is used for the ultra-high pressure steam in ethylene plants
Is it imported or domestic? ? ?