About Us
Dalian Dagaohao Valve Co., Ltd. products cover nuclear industry, military, petrochemical, power, long-distance pipelines, LNG and many other fields and industries. The company has the ability to independently research, design and manufacture high and medium pressure steel valves and forgings. It is the Vice Chairman Unit of China General Machinery Industry Association Valve Branch; National High-tech Enterprise; National Key "Little Giant" Enterprise; National Postdoctoral Research Workstation...
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DN50 axial flow check valve
Nuclear grade axial flow check valve is a key basic protective equipment in various fluid systems of nuclear power plants, mainly used to prevent medium backflow, avoid damage to system equipment caused by backflow, and ensure safe and stable operation of the system. It is widely used in key parts such as the water supply system, cooling water system, and auxiliary system of nuclear and conventional islands, and its reliability directly affects the operational safety and efficiency of nuclear power plants. In 2025, through industry technology achievement appraisal, the appraisal committee believes that the prototype of the developed axial flow check valve product has independent intellectual property rights, and its main performance indicators have reached the advanced level of similar international products, which can be promoted and applied.
DN150 axial flow check valve
Nuclear grade axial flow check valve is a key basic protective equipment in various fluid systems of nuclear power plants, mainly used to prevent medium backflow, avoid damage to system equipment caused by backflow, and ensure safe and stable operation of the system. It is widely used in key parts such as the water supply system, cooling water system, and auxiliary system of nuclear and conventional islands, and its reliability directly affects the operational safety and efficiency of nuclear power plants. In 2025, through industry technology achievement appraisal, the appraisal committee believes that the prototype of the developed axial flow check valve product has independent intellectual property rights, and its main performance indicators have reached the advanced level of similar international products, which can be promoted and applied.
Nuclear grade Y-shaped bellows globe valve
The basic design function of a nuclear grade Y-shaped bellows globe valve is to cut off or connect the medium flow in the pipeline under required operating conditions. Allow the medium to flow when the valve is opened; When the valve is closed, it should be ensured to be cut off. The valve can only be in the fully open or fully closed position. The prototype has passed comprehensive identification tests such as cold and hot life, cold and hot alternation, cold and hot cycle, fluid blockage, vibration aging, earthquake, and end loading, and can meet various functional requirements under operating conditions.
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Party BuildingParty building leads the aggregation of strength, and Hualong demonstrates its responsibility in tackling challenges
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Party BuildingRaise the Party flag high to ensure supply, work together to tackle challenges and build new achievements
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Party BuildingCarrying the flag forward and shouldering the mission, Tian Gaobao provides a new chapter in the genealogy
View DetailsCompany Qualifications
International Authoritative Certifications, Trustworthy Quality
Gold Award at the International Fluid Machinery Exhibition
China General Machinery Industry Association
Type test certificate
National Pump and Valve Product Quality Inspection and Testing Center
Occupational Health and Safety Management System Certification
Shenzhen Huantong Certification Co., Ltd
API Certification Certificate
API
CE Certification
CE
News & Updates
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The signing ceremony for the strategic capital increase of Dalian Dagao Valve has come to a successful conclusion, as the industry gathers strength to embark on a new journey together
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The research team of Nanning Federation of Industry and Commerce visited Dalian University for inspection and research on the college entrance examination
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