In the grand narrative of China's manufacturing industry, "domestic substitution" is a core theme that runs through multiple industries. From semiconductors to industrial software, from high - end bearings to precision instruments, every breakthrough in these sub - fields carries the expectation of independent and controllable industrial chains. In the field of industrial basic components, valves - a category that seems traditional but is actually highly technology - intensive - are at the crossroads of domestic substitution, undergoing a profound transformation from "low - end volume - based" to "high - end breakthrough - oriented".
China is the world's largest producer and consumer of valves. According to industry statistics, in 2024, the market size of China's valve industry exceeded 250 billion yuan, with an annual output of over 8 million tons, accounting for more than one - third of the global total valve output. However, behind these large numbers lies an awkward structural imbalance: in terms of output value, domestic valves account for about 75% of the market share, but when calculated by value, the market share of imported brands in the high - end valve market is still over 60%.
The interpretation of this set of data points to a core fact: domestic valves are already the absolute dominant in quantity, but still in a position of catching up in terms of value. The localization rate of common general - use categories such as ordinary carbon steel gate valves, globe valves, and ball valves is extremely high, and market competition has become intense, with price wars becoming the norm. In the high - end industrial valve field - such as high - temperature and high - pressure wear - resistant valves for petrochemical hydrogenation units, high - differential pressure control valves for ultra - supercritical thermal power units, ultra - low - temperature valves for liquefied natural gas receiving stations, and main steam isolation valves for nuclear power plants - imported brands still hold the pricing power and discourse power.
The gap between domestic valves and international first - tier brands is not something that can be easily caught up with just by doing a few more years of work. This gap is systematic and is reflected in three dimensions: technological accumulation, manufacturing systems, and brand credit.
The generational gap in design and R & D capabilities is the most fundamental. International valve giants such as Emerson in the United States, KSB in Germany, and KITZ in Japan have decades or even centuries of application data accumulation. The calculation of valve diameters for each new medium, the design of sealing specific pressure for each type of working condition, and the thermal expansion compensation of each high - temperature alloy have all been verified through long - term iterations. Most domestic valve enterprises are still at the stage of "reverse design + experience correction" and lack the original design ability starting from basic theories and experimental data.
The generational gap in materials science and process control is also obvious. The corrosion - resistant alloys, high - temperature alloys, and special hard alloys involved in high - end valves, their composition design, smelting process, and heat treatment system form technical barriers that are difficult to replicate quickly. Taking the surfacing material of the valve seat sealing surface of petrochemical hydrogenation valves as an example, the porosity, dilution rate, and thermal fatigue resistance of the Stellite alloy surfacing layer of imported brands are much more consistent in mass production than domestic similar products. The sealing reliability of ultra - low - temperature valves in a - 196°C liquid nitrogen environment more depends on the precise control of the low - temperature brittleness transition and thermal shrinkage coefficient of materials. The establishment of these databases requires the continuous accumulation of several generations of engineers.
The generational gap in manufacturing accuracy and process control capabilities affects the consistency and reliability of products. High - end valves have extremely high requirements for the dimensional tolerances and geometric tolerances of key mating surfaces, and the finishing process relies on high - precision CNC equipment and experienced operators. A considerable number of domestic valve enterprises still adopt the mode of general - purpose machine tools plus manual operation, and the process capability index (Cpk) is difficult to reach the international advanced level. There are also differences in the pressure test and leakage rate detection standards before valve delivery. The "qualified" standards of some domestic enterprises are only marginally usable in the international specification system.
Although the gap exists objectively, the process of substitution is also accelerating. Currently, three major forces are reshaping the localization pattern of the valve market.