O-ring
Thread Content
What are the characteristics and uses of fluororubber O-rings and nitrile O-rings respectively?
The O-ring is the most widely used type of seal in hydraulic and pneumatic transmission systems. It is mainly used for static sealing and reciprocating motion sealing. Its operating speed range is generally 0.005 to 0.3 m/s. When used for sealing rotary motion, it is limited to low-speed rotary sealing devices. Fluororubber O-rings: Operating temperature range: -20 to 200 degrees Celsius. Nitrile rubber O-rings: Operating temperature range: -40 to 100 degrees Celsius. Compared to the latter, the former can withstand higher temperatures. This post was last edited by zhangyong6404 on 2009-4-15 18:08.]
One more thing: fluororubber O-rings have better oil resistance than nitrile rubber
Fluororubber O-rings have a higher hardness than nitrile O-rings, a longer service life, and can be reused multiple times.
Fluororubber O-rings are resistant to oil and high temperatures. Dingqing O-rings are not oil-resistant
Attention upstairs: Nitrile rubber is also oil-resistant
Our experience shows that fluororubber O-rings are resistant to corrosion, and their wear resistance is better than that of nitrile rubber O-rings. Nitrile rubber O-rings are resistant to oils, and their sealing performance is superior to that of fluororubber O-rings
The oil resistance of nitrile rubber is second only to that of polysulfide rubber and fluororubber. Fluororubber is a copolymer of vinyl fluoride and hexafluoropropylene, with a density as high as 1.85. Depending on its molecular structure and fluorine content, fluororubber exhibits varying levels of chemical resistance and low-temperature resistance. The advantages of fluororubber include self-extinguishing when away from heat, excellent airtightness, resistance to ozone and weathering, and good aging resistance. Viton products, which are vulcanized using organic peroxides, exhibit even superior performance. The operating temperature for NBR is -30 to 110°C. It can resist exposure to mineral oil, vegetable oil, animal oil, flame-retardant fluids such as HFA, HFB, and HFC, boiling water, and seawater. The operating temperature range for fluororubber is -25 to 200°C. It can resist exposure to various mineral oils and synthetic base oils, vegetable oils, animal oils, water-based flame-retardant hydraulic fluids, aromatic hydrocarbons and chlorinated hydrocarbon compounds, as well as most inorganic acid mixtures.