E-Catalog > O Ring And Sealing part :O-Ring,V-Packing,Oil seal,V-Ring,Piston And Rod > O-Ring Viton 75 ShA ,90 Sh A โอริงไวตัน
Product Information :
- ยาง และพลาสติก
- O Ring And Sealing part :O-Ring,V-Packing,Oil seal,V-Ring,Piston And Rod
- เครื่องมือ, เครื่องจักรและอุปกรณ์
- บริการ
- วัตถุดิบ
- สินค้า, ผลิตภัณฑ์
Product Detail :
สอบถามรายละเอียดเกียวกับสินค้าหรือขอข้อมูลเพิ่มเติม ติดต่อบริษัทฯ โดยตรง
For more information about the product or request additional information. Contact the company directly at Tel.+66 (0) 2363-7582, +066 (0) 2363-7693
Basic elastomers for O-Rings
The following paragraph briefly reviews various elastomers currently available for use in O-Rings and other seals.
FKM (Fluorocarbon Rubber)
Fluoroelastomers were introduced in 1957 (DuPont-Viton®) to meet the need of the aerospace industry for a high-performance seal elastomer. Since then, the use of fluoroelastomers has expanded to many other industries, especially the automotive, fluid power, appliance sectors, and many chemical fields. With over 50 years of proven performance, fluoroelastomer has developed a reputation for outstanding performance in high temperature and extremely corrosive environments.
Fluoroelastomers are highly fluorinated hydrocarbon polymers. In general, all highly fluorinated polymers
are very stable and possess exceptional resistance to oxidation, weather, flame, chemical attack and swelling in a wide range of liquids. This stability is mainly due to the high strength of the C-F bond as compared to the C-H bond.
FKM rubbers are available in various grades, which differ mainly in the polymer composition and fluorine content. In combination with the cure system (diamines, bisphenol or peroxides) the properties of the compound can be influenced to meet the requirements of the application. In general FKM has an outstanding resistance to high temperatures, it’s elastomeric properties in hot air are maintained up to 204°C with peak temperatures up to 300°C. FKM elastomers exhibit excellent resistance to swelling in a wide variety of oils, fuels, solvents and chemicals.
They are recommended for:
• Petroleum oils and hydrocarbon fuels
• Organic ester based lubricants
• Silicate ester based lubricants
• Aromatic hydrocarbons (benzene, toluene, xylene)
• Halogenated hydrocarbons (trichloroethylene, carbon tetrachloride)
Despite their excellent resistance to a wide variety of fluids, there are certain chemicals that severely attack FKM compounds.
The use of FKM elastomers is not recommended for:
• Polar solvents, ketones (acetone, MEK) and esters (ethyl acetate)
• Low molecular weight organic acids (formic acid, acetic acid)
• Hot water and steam, unless compounded with lead oxide
• Skydrol fluids
• Glycol based automotive brake fluids
• Anhydrous ammonia and amines
• Hot hydrofluoric or chlorosulphonic acids
The fluid resistance of FKM types improves with increasing fluorine levels. However, as the fluorine content increases the low-temperature flexibility of the polymer decreases, and a compromise must be made between fluid resistance and low temperature flexibility of the final vulcanizate. The low-temperature properties of conventional FKM elastomers are, in general, moderate. For low-temperature applications special FKM types have been developed.TABLE 2: MAIN CHARACTERISTICS FKM – V70N00E | |||
FKM-V7N00E | |||
TRADE MANE | TEMPERATURE RANGE | CHEMICALL RESISTANCE | APPLICATIONS |
VITON®,FLUOREL®, TECNOFLON® | -20 / +204°C | HYDRAULIC FLUIDS MINERAL AND VEGETABLE OILS ALIPHATIC HYDROCARBONS: (FUEL, BUTANE, PROPANE, NATURAL GAS) AROMATIC HYDROCARBONS (BENZENE, TOLUENE) CHLORINATED HYDROCARBONS (TRICHLOROETHYLENE, CARBON TETRACHLORIDE FUELS, ALSO WITH METHANOL CONTENT VACUUM OZONE, WEATHER AND AGING RESISTANT | HIGH TEMPERATURE TO OILS, FATS AND FUELS CHEMICAL INDUSTRY VACUUM APPLICATIONS |
NOT COMPATIBLE WITH: | |||
GLYCOL BASED BRAKE FLUIDS, AMMONIA GAS, AMINES, ALKALIS SUPERHEATED STEAM |