In hydraulic systems, fluorine rubber sealing rings, due to their excellent properties such as high temperature resistance, chemical corrosion resistance, aging resistance, and superior mechanical performance, have become the core sealing solution for dealing with extreme working conditions and high-performance scenarios. The advantages of these sealing rings can be systematically summarized as follows:
1. Excellent high-temperature resistance, suitable for extreme hot environments
Long-term working temperature range: The fluorine rubber sealing ring can operate stably at temperatures ranging from 200°C to 250°C for a long time, and can withstand a short-term temperature of up to 300°C, far exceeding the performance of nitrile rubber (approximately 120°C) and silicone rubber (approximately 180°C).
Thermal stability mechanism: The C-F bonds in the fluorine rubber molecular chain have high bond energy, and the strong electronegativity of fluorine atoms can shield the carbon atoms in the main chain, reducing the risk of thermal decomposition. Below 150°C, the tensile strength gradually decreases with increasing temperature; between 150°C and 260°C, the decline trend becomes more gradual, ensuring controllable sealing performance at high temperatures.
Application scenarios: Suitable for aerospace engines, high-temperature industrial furnaces, oil refining and chemical industries, etc., for high-temperature hydraulic systems that need to be sealed against heat aging and prevent leakage caused by it.
2. Strong chemical corrosion resistance, compatible with various media
Media compatibility: The fluorine rubber has excellent stability against fuels, hydraulic oils, lubricants, concentrated nitric acid, sulfuric acid, hydrochloric acid, and high-concentration peroxides. Its chemical stability performance is the best among all rubber elastomers.
Chemical stability mechanism: The strong adsorption effect of fluorine atoms can shield the carbon atoms in the main chain, reducing the attack of chemical reagents; at the same time, the high fluorine content in the fluorine rubber molecular structure further enhances its anti-corrosion ability.
Application scenarios: Suitable for hydraulic systems in chemical production, oil extraction, pharmaceutical equipment, etc., that need to be in contact with corrosive media, avoiding failure of the sealing ring due to media erosion.
3. Excellent aging resistance and ozone resistance, extending service life
Aging resistance: The fluorine rubber sealing ring maintains good performance after 10 years of natural storage, far exceeding that of ordinary rubber materials (such as nitrile rubber only 3-5 years).
Ozone resistance: After being exposed to an ozone volume fraction of 0.01% in the air for 45 days, the surface of the fluorine rubber shows no obvious cracking, while ordinary rubber may develop cracks due to ozone attack.
Application scenarios: Suitable for outdoor equipment, long-running machinery, etc., that need to be exposed to natural environments or ozone environments for a long time, reducing the frequency of sealing ring replacement and lowering maintenance costs.
4. Excellent mechanical properties, ensuring sealing reliability
Tear resistance and elongation at break: The fluorine rubber exhibits excellent tear resistance and elongation at break, capable of withstanding high pressure, high-frequency vibration, and other complex conditions.
Low compression deformation rate: Through testing experiments, the compression deformation rate of the fluorine rubber sealing ring is extremely low, ensuring good sealing performance even after long-term use.
Low-temperature performance and compensation mechanism: In the temperature range of -20°C to -15°C, the fluorine rubber maintains elasticity; the tensile strength increases at low temperatures, although it may become harder, but by reasonable design of the sealing structure (such as increasing preload), the low-temperature shrinkage can be compensated to avoid leakage.
Application scenarios: Suitable for high-pressure hydraulic systems, vibrating equipment, extreme temperature environments, etc., where the mechanical properties of the sealing ring are strictly required.
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