Wuhan Dayu Valve Co., Ltd. (hereinafter referred to as "Dayu Company") was established in July 1998. It is one of the first 86 high-tech enterprises re recognized according to the new standards in Hubei Province in 2008. Currently, it has more than 90 patents, including 40 invention patents, and is an internationally renowned and domestically leading valve manufacturer.

1、 Driven by innovation, standing at the forefront and promoting high-quality development
As a national level specialized and innovative "little giant" enterprise, the company adheres to the concept of "exploring and innovating, forging ahead", and is constantly committed to the development of new products and technologies. The company has successively established the Hubei Enterprise Technology Center and the Hubei Engineering Technology Research and Development Center. Through unremitting efforts, three products (rain shower alarm valve, eccentric hemisphere valve, backflow preventer) have been awarded the "National Torch Plan Project" and "National Key New Product" by the state. The piston type multifunctional control valve produced by the company obtained the "Science and Technology Achievement Appraisal Certificate" issued by the Hubei Provincial Department of Science and Technology in 2005. Valves such as waterproof hammer zero water loss liquid control check eccentric ball valve, water hammer relief valve, and large-diameter piston type regulating valve were evaluated and appraised by experts organized by the Ministry of Water Resources in 2018 as leading domestic level, and obtained the "New Product Appraisal Certificate" of the Ministry of Water Resources.

Through years of accumulation, the company has gradually grown into a well-known brand in the domestic valve industry, and has gained recognition and trust from customers both inside and outside the industry. The company has successively won honors such as "China's Most Valuable Investment Enterprise", "National Quality and Credit Double Guarantee Demonstration Unit", "Hubei Province Innovation Pilot Enterprise", "Hubei Province Intellectual Property Demonstration Enterprise", "Hubei Province Famous Brand Product", "Wuhan Private Technology Demonstration Enterprise", "Wuhan High tech Enterprise Research and Development Center", and "Wuhan Excellent Private Enterprise".

2、 Gather qualifications and establish a high-end brand image
The company has strong technical strength and excellent product quality. It has successively passed the ISO9001:2000 quality system certification of Lloyd's Register in the UK, ISO14001 environmental system certification in Germany, WRAS certification in the UK, and AZ certification of the General Administration of Quality Supervision, Inspection and Quarantine of China; And participated in the formulation of eight national industry standards, including butterfly valves for water supply and drainage, buried gate valves for water supply and drainage, split pilot pressure reducing and stabilizing valves, aluminum alloy and stainless steel gates, eccentric half globe valves, butterfly slow closing check valves, pressure reducing backflow preventers, and soft sealed gate valves for water supply and drainage; The company owns the Dayu graphic trademark and was awarded the honorary title of China Famous Trademark in December 2012.

3、Concentrate our efforts, fulfill our mission, forge ahead, and courageously move forward
Dayu Company is the earliest valve company to intervene in long-distance water diversion projects and is an absolute authority in the field of long-distance water diversion. After years of research and exploration, through the analysis of long-distance pipeline water transmission systems and specific engineering examples, Dayu Company has summarized a set of safe and energy-saving valve selection schemes, effectively solving the problems of water hammer, negative pressure, gas accumulation, and secondary pollution in long-distance pipeline water transmission systems. It has saved billions of yuan in energy and made great contributions to the national economic and social development and water supply safety.

The company has successively taught at eight ministerial level design institutes (Northeast Institute, Beijing Institute, North China Municipal Institute, Tianjin Municipal Institute, Shanghai Municipal Institute, Shanghai Urban Construction Institute, Central South Municipal Institute, Southwest Municipal Institute), nine major hydropower design institutes (Guizhou Survey Institute, Chengdu Survey Institute, Kunming Survey Institute, Northwest Institute, Central South Institute, East China Institute, Northeast Institute, Beijing Institute, Tianjin Institute), five major committees (Yangtze River Committee, Yellow River Committee, the Pearl River Committee, Huaihe Committee, Songliao Committee), provincial and municipal water conservancy institutes and municipal institutes to teach them the concept and technology of pipeline water transportation.

Excellent quality, high-quality service, and high-end brand image have won Dayu Company's products a broad market. Dayu Company's valves are widely used in national key water conservancy and hydropower projects, with the South to North Water Diversion Project in Henan Province accounting for 85% of the functional valves (the largest supplier), the South to North Water Diversion Project in Hebei Province accounting for 75% of the functional valves (the largest supplier), the South to North Water Diversion Project in Shandong Province accounting for 85% of the functional valves (the largest supplier), and the Northwest Liaoning Water Supply Project accounting for 70% of the functional valves (the largest supplier). Their good operation has been recognized by national level projects. 25% of the valves used in the Three Gorges Project are supplied by Dayu Company, 35% of the valves used in the South to North Water Diversion Project are Dayu products, and 90% of the valves in the Wuhan Cross River Tunnel, the first tunnel of the Yangtze River spanning thousands of miles, are produced by Dayu Company; Dayu products are not only popular in the domestic market, but also exported in bulk to developed countries such as Europe and America.

Dayu Company dares to take responsibility and break through. In order to break the situation where the domestic high-end valve market is dominated by foreign countries, we have gathered our strength and forged ahead. After 27 years, with talent as the cornerstone and innovation as the driving force, we have continuously promoted the overall technological progress and product quality improvement of the domestic valve industry. On the basis of absorbing advanced foreign technology and combining with the domestic situation, Dayu Company has painstakingly researched and independently developed a series of high-quality valves with independent intellectual property rights. The eccentric hemispherical valve developed is the first of its kind in the world, breaking the dominant position of developed European and American countries in the domestic mid to high end valve market. It has established a milestone for the rapid and high-quality development of China's valve industry and written an indelible chapter.

Dayu Company adheres to the concept of "innovation, development, integrity, and sharing". Through technical exchanges, conference discussions, and project demonstrations, it has transmitted concepts and technologies to a large number of valve enterprises and research institutes in China, feedback Dayu's innovative achievements to society, actively promote the overall quality improvement of China's valve industry, and elevate the overall technical level of the domestic valve industry to world-class level. Dayu Valve Company will forge ahead, accelerate the pace of enterprise development and growth, and continue to strive for the corporate vision of "building a world-class valve enterprise and achieving industrial service to the country".