O-rings are commonly used and critical sealing elements across various industries, with wide applications in hydraulics and pneumatics.
In the automotive industry, O-rings are key components used in engines and transmissions to seal fuel, lubricating oil, and high-temperature exhaust gases. They withstand temperatures from -20°C to over 200°C. They are also used in fuel systems to seal fuel injectors and fuel lines, in braking systems to prevent brake fluid leakage, and in air conditioning systems to protect against refrigerant corrosion.
In high-end manufacturing, O-ring applications are even more precise and demanding. For example, in the semiconductor and electronics industry, they are used to seal CVD and etching equipment, withstanding high-purity gases and plasmas. Common materials include FFKM and FKM. In the aerospace industry, they are used to seal hydraulic fluid and aviation fuel, adapting to extreme temperatures and high-pressure environments. In the petrochemical industry, they are used in pipelines, valves, and reaction equipment to seal against strong acids, strong alkalis, hydrocarbons, and organic solvents.
According to market research, the global O-ring market size will reach approximately RMB 32.57 billion in 2025, and is expected to maintain steady growth in the future. Major players in the global market include international companies such as NOK, DuPont, Trelleborg, SKF, and Parker Hannifin, as well as Chinese domestic companies such as Zhongding Group, Xinmi Technology, and Langbo Sealing.
