Technology development is accelerating! Domestic high-end mechanical seals have achieved breakthroughs in various fields.
October 2026: As a core component of high-end equipment, mechanical seals are essential for ensuring the safe and stable operation of devices in industries such as petrochemicals, energy storage, nuclear power, and electricity generation. They directly determine the sealing performance, stability, and service life of fluid-based equipment. Recently, the domestic mechanical seal industry has continuously broken through technical barriers. Successes have been achieved in areas such as adaptation to extreme operating conditions, replacing imported products, and reducing energy consumption. The process of domestic production is now accelerating significantly.
In the field of high-end energy storage equipment, domestic perfluor ether-based seals have passed important testing in various scenarios. To meet the harsh operating conditions of high temperature, high pressure, and strong corrosion associated with salt cavern compressed air energy storage plants, domestic-perforated ether mechanical seals have been successfully used in large-scale energy storage compressors. These seals can withstand extreme temperatures of up to 400°C and high-pressure conditions, and have been able to operate without failures for six consecutive months. This product has completely broken the long-term dependence on imported seals in the high-end energy storage sector, addressing the problems of poor compatibility of imported components, high maintenance costs, and long supply chains. It helps to fill the key gaps in the domestic production of new energy storage equipment.
Domestic production has also been implemented in heavy industry sectors such as nuclear power and petrochemicals. Domestic sealing companies continue to focus on the nuclear power support market, successfully delivering mechanical seals for pumps used in nuclear power plants of level II and III, as well as for conventional island systems. These products meet the strict requirements of high safety, high reliability, and long service life in nuclear power plants, helping to ensure that core components of nuclear power equipment are produced domestically. At the same time, a specialized mechanical seal for industrial extrusion machines was successfully awarded to a large petrochemical company's procurement project. This product is suitable for high-load and continuous production environments in the petrochemical industry, effectively improving the leak-proof performance of chemical processing equipment and reducing potential problems during production line operation and maintenance.
In addition, sealing technologies designed for extreme operating conditions are now being implemented on a large scale. Domestic floating oil seal technology has achieved full-chain development: it has gone through stages from research and development, installation testing to mass production. It has been successfully integrated into the supply chains of many major heavy machinery manufacturers. This technology is widely used in core equipment such as mining machinery, engineering equipment, and reducers, filling the gap in mass production of floating oil seals for extreme operating conditions in China. Meanwhile, intelligent sealing detection technology has made innovative breakthroughs. A high-performance sealing system for centrifugal pumps based on sensors has received patent authorization, enabling real-time monitoring of the operation status of mechanical seals and early warning of faults, significantly enhancing the intelligence level of industrial equipment operation and maintenance.
Industry data shows that as the performance and stability of domestic sealing products continue to improve, not only can core technologies be controlled independently, but they also help various industrial enterprises significantly reduce operating costs. By using high-precision mechanical seals produced domestically, the consumption of sealing materials in industrial equipment and the frequency of repairs are greatly reduced. The overall cost of equipment operation and maintenance is significantly lowered. At the same time, fluid leaks and energy losses are effectively minimized, aligning with the trend of green, low-carbon, and efficient energy-saving development in the industrial sector.
Industry experts say that mechanical seals, as "small but crucial components" in industry, are an important foundation for the localization of high-end equipment manufacturing. In the future, domestic sealing companies will continue to focus on three key areas: extreme operating conditions, high-end equipment, and intelligent operation and maintenance. They will further develop material research and development, structural optimization, and intelligent monitoring technologies, accelerate the replacement of imported products, and lay a solid foundation for the high-quality development of industries such as petrochemical energy storage, clean energy, high-end heavy industry, and nuclear power.