To ensure the quality of this valve, strict control measures are in place for the forging process of all its parts. The initial and final forging temperatures, deformation degree, and deformation speed are closely monitored in accordance with regulations and process cards. Cooling methods are also precisely selected. Each forging product undergoes chemical composition analysis, mechanical property test, intergranular corrosion test, and metallographic structure analysis. All test results are documented and compared against corresponding standards, validating that the valve meets the required quality standards.
Ultrasonic inspection and liquid penetrant inspection play a critical role in ensuring the quality of forgings. In compliance with the RCC-M guidelines, the forgings undergo a thorough examination. Firstly, the entire surface of the forgings is subjected to liquid penetrant inspection and evaluation. This meticulous process ensures that every inch of the surface is carefully examined for any potential flaws or defects. Additionally, in accordance with the RCC-M requirements, a 100% ultrasonic flaw detection and evaluation is conducted on the forgings. This comprehensive inspection method guarantees that no imperfections go unnoticed, thus upholding the high quality standards of the forgings. By employing both ultrasonic and liquid penetrant inspections, the integrity and reliability of the forgings are meticulously upheld, meeting the stringent criteria set forth by RCC-M.
To enhance the welding quality of the valve disc and seat's sealing surface, the process of surfacing welding employs the plasma argon arc welding technique. To ensure the welding quality, the welding process employed in manufacturing has undergone requalification.
Proper assembly and testing are essential for producing high-quality products. This is not only about using high-precision parts, but also ensuring that these parts are assembled correctly to create high-performance products. At CNNC Su Valve, we have a dedicated team of experienced and skilled technicians and senior technicians who handle all of our assembly and debugging processes. Our team ensures that we strictly check and test all parts to guarantee that they are functioning as intended. We continuously work to improve our assembly and testing processes to ensure that all of our valves meet the design task book requirements. Once the assembly and debugging process is complete, we carry out various performance tests to ensure that all indicators align with the specifications set forth in our design task book.
A comprehensive quality plan has been created for the valve to ensure its complete quality control process. This encompasses quality assurance activities from the use of raw materials to the final stages of testing, cleaning, and assembly. The valve undergoes close inspection at each stage of its journey, including blank input, machining, welding, heat treatment, non-destructive testing, assembly, factory testing, and various type tests. This rigorous quality protocol has been thoroughly reviewed and verified by the Second Industrial Research and Design Institute. Their accreditation and oversight ensure that the valve meets the highest quality standards in the industry.
The double flap butterfly check valve is a perfect fit for various applications. It is particularly well-suited for large-scale water supply pipeline networks in high-rise buildings, as well as pipeline networks that handle corrosive chemicals. Additionally, its compact design makes it an ideal choice for installation in areas with limited space. It doesn't stop there, as this versatile valve is also suitable for use in sewage pipeline networks. Its adaptability and performance make it a valuable asset in a range of scenarios.
The lift-type silent check valve is an economical and practical solution suitable for high quality water supply and drainage projects. It is specifically designed for pipeline networks that have strict requirements for water quality. Additionally, it is ideal for pipeline networks with relatively high pressure requirements, notably PN2.5Mpa. This versatile valve can be conveniently installed at the outlet of a pump. It effectively prevents water hammers and ensures the smooth operation of the system.
The lift-type silencing check valve is specifically designed for the water supply and drainage systems, as well as the pipe networks of high-rise buildings. This versatile valve can be conveniently installed at the pump outlet, making it easily adaptable to different configurations. In fact, its structure allows for some modifications, enabling it to function as a suction bottom valve when needed. However, it is important to note that this type of valve is not suitable for usage in sewage pipe networks.
The ideal valve for submersible pumps, as well as draining and sewage systems, is the horizontal check valve. It is particularly well-suited for handling sludge and sewage.
The swing rubber check valve is an ideal solution for use in the domestic water pipe network. It provides reliable and efficient functionality to regulate the flow of water. However, it is not recommended for use in sewage systems that have a high sediment concentration. This is because the valve may get clogged, leading to disruptions in the flow of sewage. To ensure optimum performance, it's important to use the swing rubber check valve in the appropriate applications where it can function effectively.
The swing single flap check valve is specifically designed for various industrial sectors such as water supply systems, petroleum, chemical industry, and metallurgy. It is especially ideal for installation spaces that are limited in size. This valve is highly suitable for applications in these industries due to its compact design and efficient functionality. Whether it is for water supply systems or in the petroleum and chemical industries, this valve is sure to meet the requirements of your specific application. Additionally, its single flap design ensures effective flow control and prevents backflow, making it a reliable choice for a wide range of industrial uses.