Nuclear shield casting soul! Dalian Dagao guards the safety gate of China's nuclear power with ingenuity

0.001 seconds, the response accuracy of the nuclear first level blasting valve; 60 years, minimum lifespan guarantee for blasting valves; 20 million yuan, the cost savings of a single unit compared to imported products... Behind these figures, Dalian Dagao Valve Co., Ltd. (referred to as "Dalian Dagao") has forged an old brand enterprise into a "hidden champion" that safeguards national nuclear safety in 20 years. The transformation of this enterprise is engraved with the ultimate interpretation of the word "safety" by the craftsmen of a great country, and also witnesses China's resolute steps from a nuclear power country to a nuclear power powerhouse. Nuclear Shield Promotes Enterprises: Reshaping Enterprise Genes in the Nuclear Power Exclusion ZoneIn the summer of 1999, anxiety and unease pervaded the high-pressure valve factory in Dalian.. In front of the newly appointed factory manager, there are two documents lying out: one is the financial statement for 8 months of unpaid wages to 3000 workers, and the other is the just drafted "Nuclear Power Valve Qualification Application Plan". At that time, Dalian High Pressure Valve Factory was suffering from the impact of the Asian financial crisis. The factory had long OEM produced low-pressure small-diameter valves for foreign brands, and more than 90% of its products relied on exports. After the crisis struck, orders sharply decreased and workshops were shut down. In the face of questioning, Yu Chuanqi was extremely firm: "The highest end valve market is in nuclear power. We must bite this hard bone and not retreat." At that time, China's nuclear power industry was still in its infancy, and the nuclear grade valve market was monopolized by international giants. In this situation, Dalian High Pressure Valve Factory completed the qualification review in 6 months, becoming the first enterprise in Northeast China to obtain the qualification for nuclear power valve access. On the day of obtaining the qualification, Yu Chuanqi silently recited in his heart, "Plant today, and one day it will become a forest." This seed grew hard in the cold winter. Dalian Dagao has never given up on the research and development of nuclear power valves, relying on business such as domestic sales of petroleum and petrochemicals for blood transfusion. When the first round of nuclear power development in China was launched in 2006, peers were still competing for the civilian valve market. Dagao had already knocked on the door of Qinshan Nuclear Power Station with the first batch of nuclear grade valves, creating a supply record for domestic enterprises in the field of conventional island valves for nuclear power. In the following years, Dalian Dagao's nuclear power "performance record" continued to refresh: when participating in the construction of Hongyanhe Nuclear Power Plant, its independently developed nuclear secondary gate valve passed the cyclic opening and closing test, and its service life far exceeded the design requirements; Hundreds of valves provided for Karachi Nuclear Power Station in Pakistan operate stably under high temperature and humidity environment, and become the quality benchmark of nuclear power cooperation in the joint construction of the "the Belt and Road"; In the 2015 Qinshan Fangjiashan project, Dalian Dagao Valve won the check valve order with a price 30% lower than that of international giants, saving more than 20 million yuan in costs per unit and showing the industry the cost-effectiveness advantage of domestic valves... "Dalian Dagao Valve has laid a solid foundation for promoting 100% equipment localization and supplying equipment to various projects in the Guohe series, and promoting the high-quality development of the Guohe series equipment industry chain and supply chain." The person in charge of the Guohe No.1 Industry Chain Alliance's design equipment innovation optimization platform commented. Today, Dalian Dagao's products cover mainstream reactor types such as "Hualong No.1" and "Guohe No.1", with a domestic market share of more than 40%. With the joint construction of the "the Belt and Road" project, Dalian Dagao has entered more than 20 countries, becoming a veritable "main force" in the independent control of nuclear power valves. As a former chairman unit of the Valve Branch of the China General Machinery Association, Dalian Dagao has also led or participated in the development of 23 industry standards for nuclear power valves, establishing a complete set of "Chinese specifications" for domestic valves from material selection to life testing.

Nuclear Shield Forge Heart: A Thousand Tests Temper the Spirit of CraftsmanshipThe statement "3 Millisecond Response" is particularly prominent in the inspection report of the nuclear first level blasting valve.. This product, known as the "iconic equipment" and one of the "most difficult valves" of third-generation nuclear power, is from Dalian Dagao. Nowadays, Dalian Dagao has become the manufacturer of the world's largest caliber and highest pressure nuclear grade blasting valves, and with its expertise, precision, and innovation, it profoundly influences the safety pattern of China's nuclear power equipment. We always emphasize focusing on one thing rather than pursuing profit, "said Yu Fan, the executive general manager of Dalian Dagao." The design life of a nuclear power plant is 60 years, and our valves have to be like ancestral furniture that can be passed down for several generations. "Xiao Jian, the deputy general manager who has worked at Dalian Dagao for most of his life, told reporters that there is no experience to draw on and no mature technical route. The development of seemingly simple main steam isolation valves and blasting valves took more than 10 years. Blasting valve is a unique nuclear safety equipment in third-generation nuclear power plants. In the event of a serious abnormal accident, the blasting unit is triggered by opening the valve signal, and the valve channel is opened within milliseconds, allowing cooling water to quickly enter the core for cooling. This can effectively alleviate and prevent the occurrence of serious accidents. In the process of studying nuclear first stage blast valves, millisecond level reliable triggering is the first challenge. The blasting valve must respond quickly in milliseconds under accident conditions, and the ignition reliability of the driving device directly affects nuclear safety, "Xiao Jian said. The research and development team abandoned foreign technological paths and explored independent gunpowder formulas through thousands of experiments, achieving millisecond level stable driving after ignition. Dalian Dagao has also innovated a redundant ignition system with built-in dual ignition or triple ignition circuits. In case of any malfunction, the backup system will automatically start, increasing reliability by 30%. Dynamic sealing technology can ensure zero leakage even under explosive impact. The design life of a nuclear power plant is 60 years, and the blasting valve needs to maintain stable performance under long-term irradiation, high temperature and high pressure environments. Xiao Jian said that Dalian Dagao uses nuclear grade stainless steel and enhances its corrosion resistance through hard chrome plating. The modular design shortens the replacement time of the drive device by 60% and reduces long-term maintenance costs. Innovation is not something that can be achieved overnight, nor can it be accomplished by enterprises alone, "said Yu Fan. As the honorary chairman unit of the Valve Branch of the China General Machinery Association, Dalian Dagao's innovation system embodies the wisdom of" aggregation power "and has built a deep integration model of" industry university research and application "." With project management as the core, each major project sets up a team, clarifies division of labor, nodes and assessments, and shortens the research and development cycle of the 'Guohe No.1' blasting valve by 40%. This model enables the 'little giant' to unleash the great energy to support national projects. "It is reported that Dalian Dagao Joint University Institute undertakes 10 major national science and technology projects.

Nuclear Shield Anbang: The cornerstone of building a great safety wall for nuclear powerIn 2019, Dalian Dagao completed the localization appraisal of the main steam isolation valve - a "Chinese valve" that is 1.2 seconds faster than international standards, which effectively supports the construction of nuclear power plants.. Running a business is like planting a tree, with deep roots to withstand the wind and rain at critical moments. Yu Fan said, "We not only need to get rid of the situation of being controlled by others and reduce the risk of being stuck, but also need to save costs for China's nuclear power project construction in a practical way. After localization, the cost of a single unit valve can be reduced by more than 40%." For example, in the Qinshan Fangjiashan project, Dalian Dagao won the bid with a price 30% lower than that of international giants, relying not on low price competition, but on "cost advantages under the same quality". It may take up to a month to replace the seals for imported valves, but we can come and replace them within 48 hours, "she calculated." The full lifecycle cost is only 60% of that of imports, and a single unit can save more than 20 million yuan. A more profound contribution lies in rewriting industry rules. As the first domestic enterprise to obtain ASME nuclear grade qualification in the United States, Dalian Dagao has led the development of 23 standards, making "Chinese specifications" a reference benchmark for international projects. Industry insiders believe that for China's nuclear industry, the significance of Dalian Dagao Innovation goes far beyond the success of just one enterprise. Its participation in projects such as the "Hualong One" and "Guohe One" has given China's nuclear power equipment "bargaining power" in global competition, truly holding the "lifeline" of nuclear power valves in the hands of the Chinese people themselves. The 'three endless' strategic positioning of technology research and development, system optimization, and information technology transformation is the password for us to maintain our youth forever, and it is also the future direction for Dagao Valve. Yu Fan said that Dalian Dagao's goal of becoming a benchmark enterprise in valve manufacturing is becoming increasingly clear and firm. From the brink of bankruptcy to the world stage, the annual rings of Dalian Dagao embody the code of Chinese manufacturing in the new era: when enterprises engrave "specialization, refinement, novelty" into their genes, when the spirit of craftsmanship resonates with national needs, even the smallest parts can become the cornerstone of economic development. The so-called great power's heavy weapons are not only the greatness of their body, but also the constant craftsmanship. Original text: "Nuclear Shield Casting Soul! Dalian Dagao Craftsmanship Guards China's Nuclear Power Safety Gate" - Shanghai Securities NewsNuclear Shield Anbang: The Foundation for Building a Great Wall of Nuclear Power SafetyIn 2019, Dalian Dagao completed the localization appraisal of the main steam isolation valve - a "Chinese valve" that is 1.2 seconds faster than international standards, which has effectively supported the construction of nuclear power plants. Running a business is like planting a tree, with deep roots to withstand the wind and rain at critical moments. Yu Fan said, "We not only need to get rid of the situation of being controlled by others and reduce the risk of being stuck, but also need to save costs for China's nuclear power project construction in a practical way. After localization, the cost of a single unit valve can be reduced by more than 40%." For example, in the Qinshan Fangjiashan project, Dalian Dagao won the bid with a price 30% lower than that of international giants, relying not on low price competition, but on "cost advantages under the same quality". It may take up to a month to replace the seals for imported valves, but we can come and replace them within 48 hours, "she calculated." The full lifecycle cost is only 60% of that of imports, and a single unit can save more than 20 million yuan. A more profound contribution lies in rewriting industry rules. As the first domestic enterprise to obtain ASME nuclear grade qualification in the United States, Dalian Dagao has led the development of 23 standards, making "Chinese specifications" a reference benchmark for international projects. Industry insiders believe that for China's nuclear industry, the significance of Dalian Dagao Innovation goes far beyond the success of just one enterprise. Its participation in projects such as the "Hualong One" and "Guohe One" has given China's nuclear power equipment "bargaining power" in global competition, truly holding the "lifeline" of nuclear power valves in the hands of the Chinese people themselves. The 'three endless' strategic positioning of technology research and development, system optimization, and information technology transformation is the password for us to maintain our youth forever, and it is also the future direction for Dagao Valve. Yu Fan said that Dalian Dagao's goal of becoming a benchmark enterprise in valve manufacturing is becoming increasingly clear and firm. From the brink of bankruptcy to the world stage, the annual rings of Dalian Dagao embody the code of Chinese manufacturing in the new era: when enterprises engrave "specialization, refinement, novelty" into their genes, when the spirit of craftsmanship resonates with national needs, even the smallest parts can become the cornerstone of economic development. The so-called great power's heavy weapons are not only the greatness of their body, but also the constant craftsmanship. Original text translated from: "Nuclear Shield Casting Soul! Dalian Dagao Craftsmanship Protects China's Nuclear Power Safety Gate" - Shanghai Securities News