Ameer Randolph
FKM, also known as fluorocarbon, fluoroelastomer, or fluorocarbon rubber, is a type of synthetic rubber with a wide range of applications, particularly in the sealing industry. It is known for its excellent chemical compatibility, temperature resistance, and low compression set. Given its ability to resist mineral oils and greases, aliphatic and aromatic hydrocarbons, and diesel fuels, FKM is a suitable material for use in sealing diesel fuel. This makes it an ideal choice for applications in aircraft, automobiles, and other mechanical devices that require maximum resistance to high temperatures and various fluids.
| Characteristics | Values |
|---|---|
| FKM Compatibility with Diesel Fuel | Yes |
| FKM Definition | Fluorocarbon elastomers, fluorocarbon rubber, fluoroelastomer |
| FKM Chemical Resistance | Resists mineral oils and greases, aliphatic, aromatic and also special chlorinated hydrocarbons, petrol, diesel fuels, silicone oils and greases |
| FKM Working Temperature Range | -26°C to +205°C/230°C (-15°F to +400°F/440°F). Can withstand higher temperatures for short working periods |
| FKM Speciality Chemicals | MTBE, TAME, ETBE, MeOH, EtOH, MEK, and Toluene |
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What You'll Learn
FKM's resistance to diesel fuels
FKM, also known as fluorocarbon rubber, is a highly resilient material with a wide range of applications. It is a fluorinated carbon-based polymer that offers excellent resistance to chemicals and ozone attack. FKM is particularly effective in sealing applications involving various fuels and chemicals.
When it comes to diesel fuel resistance, FKM exhibits exceptional compatibility. FKM seals are commonly used in automotive and aircraft industries to handle diesel fuels effectively. Its resistance to diesel fuels makes it a preferred choice for sealing applications in these sectors. FKM's compatibility with diesel is attributed to its chemical structure, which enables it to withstand the unique properties of diesel fuel without degradation or failure.
Additionally, FKM offers resistance to other substances commonly found in the fuel and chemical industries. It is known for its ability to resist mineral oils, greases, aliphatic and aromatic hydrocarbons, and even special chlorinated hydrocarbons. This versatility makes FKM a versatile material for sealing applications in these industries.
While FKM exhibits excellent resistance to diesel fuels, it is crucial to consider the specific conditions and chemicals present in a given application. FKM's compatibility is influenced by factors such as the presence of multiple chemicals, operating temperatures, and the specific formulation of the FKM compound. Therefore, it is always recommended to consult FKM chemical resistance guides and conduct proper testing to ensure compatibility with diesel fuels in the intended environment.
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FKM's compatibility with other chemicals
FKM, also known as fluorocarbon, fluorocarbon rubber, or fluoroelastomer, is a highly versatile material with a broad range of chemical compatibility. FKM is widely used in sealing applications due to its ability to withstand harsh chemicals and extreme temperatures. Its compatibility with various chemicals makes it suitable for use in aircraft, automobiles, and other mechanical devices.
One of the key strengths of FKM is its resistance to mineral oils and greases, aliphatic and aromatic hydrocarbons, and special chlorinated hydrocarbons. It is also compatible with petrol, diesel fuels, silicone oils, and greases. This makes FKM an ideal choice for sealing applications in the fuel and chemical industries. For instance, FKM compounds are designed to meet the needs of fuel and chemical sealing applications, offering improved cold temperature performance and heat resistance.
FKM exhibits excellent resistance to a range of chemicals, including oxygenated fuel extenders and solvents such as MTBE, TAME, ETBE, MeOH, EtOH, MEK, and toluene. This makes it a versatile material for use in various industries. FKM is also compatible with other elastomers such as EPDM and TFE/P, making it suitable for composite materials.
However, it is important to note that the compatibility of FKM with chemicals can vary depending on the specific conditions and the presence of multiple chemicals. For instance, when multiple chemicals are in use, it is recommended to refer to the rating of the most aggressive fluid when evaluating performance. Additionally, the fluorine content in FKM can impact its resistance to chemical attack and low-temperature performance.
While FKM offers excellent chemical compatibility, it is always advisable to test the material with the specific chemicals and under the intended conditions before permanent installation. This ensures that the FKM product is suitable for the user's particular application. FKM's compatibility with chemicals makes it a versatile and valuable material for a wide range of industries.
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FKM's performance in varying temperatures
FKM, or Fluorine Kautschuk Material, is a family of fluorocarbon-based fluoroelastomer materials. FKMs are known for their superior resistance to high temperatures, chemicals, and oxidation. They are commonly referred to as fluorine rubber or fluoro-rubber. The performance of FKMs in varying temperatures depends on their type and composition.
Type 1 FKMs are composed of vinylidene fluoride (VDF) and hexafluoropropylene (HFP). They have good overall performance and their fluorine content typically ranges around 66 weight percent. Type 2 FKMs are composed of VDF, HFP, and tetrafluoroethylene (TFE), which results in better chemical and heat resistance. Type 3 FKMs, composed of VDF, TFE, and perfluoromethylvinylether (PMVE), offer improved low-temperature flexibility compared to copolymers and terpolymers. Their fluorine content typically ranges from 62 to 68 weight percent.
Type 4 FKMs are composed of propylene, TFE, and VDF. While they have increased base resistance, their swelling properties, particularly in hydrocarbons, are compromised. They typically have a fluorine content of about 67 weight percent. Type 5 FKMs, composed of VDF, HFP, TFE, PMVE, and ethylene, offer enhanced base and high-temperature resistance to hydrogen sulfide. They are ideal for applications requiring high-temperature rubber gasket material.
FKMs have a wide range of applications due to their superior performance in extreme temperatures and resistance to chemicals. They are commonly used in the aerospace sector, the watch strap industry, and in gloves for handling strong organic solvents. FKM O-rings are also used in scuba diving due to their low probability of catching fire and higher resistance to decay under increased oxygen conditions.
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FKM's applications in the sealing industry
FKM, also known as fluorocarbon seals, are industrial seals made of fluorocarbon elastomer material. They are commonly used in aviation and aerospace, food and pharmaceuticals, and semiconductor manufacturing applications. FKM is used in applications where there are high rotational speeds and high temperatures, such as in radial shaft seal rings in pumps and transmissions. They are also used in the automobile, energy, and manufacturing industries.
FKM seals offer high-temperature sustainability, chemical resistance, and mechanical strength. They are stable in fuels, petroleum-based oils and greases, and aliphatic and aromatic hydrocarbons. They are also resistant to media, ozone, and aging. FKM seals have a longer lifecycle, reducing the need for frequent seal or gasket replacement. Their high compression resistance also minimises deformation, enhancing the durability of the system.
Special types of FKM are flexible even at −40 °C. The general-grade FKM material has a temperature range of −20°C to 230°C, while fluoro rubber can be used from −25 °C to 200 °C. The high fluorine content in FKM polymers makes them highly suitable for applications exposed to chemicals. The fluorocarbon elastomers used in FKM seals are responsible for their excellent properties.
FKM seals are widely preferred in industrial applications over other types of seals like metal or cartridge seals due to their high-temperature tolerance and thermal stability, which reduce heat leakage. The FDA grade of FKM elastomers is approved for applications related to consumable goods, such as food and beverages, and pharmaceuticals.
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FKM's uses in fuel and chemical sealing
FKM, also known as fluororubber or fluorocarbon, is a synthetic rubber polymer with a high concentration of fluorine and carbon-based elastomers. FKM seals are widely used in various industries, including automotive, aerospace, chemical processing, and petroleum. One of its critical applications is in fuel and chemical sealing due to its excellent resistance to chemicals, fuels, and high temperatures.
In the automotive industry, FKM is commonly used for seals in engines, fuel systems, and transmissions. Its high resistance to oils and fuels makes it ideal for these applications. FKM seals are also used in aircraft engines and hydraulic systems in the aerospace industry, thanks to their impressive thermal stability and chemical resistance.
FKM's resistance to aggressive chemicals and high temperatures makes it a preferred choice for fuel cell sealing. It is often used in sealing cell stacks and other critical components to prevent leaks and maximize fuel cell efficiency. FKM's compatibility with diesel fuel and other hydrocarbon-based fuels contributes to its popularity in the automotive and aerospace sectors.
Additionally, FKM seals offer high oxygen stability and a limited impact on aging. They have a lifespan of about 5000 hours at 200˚C. This extended lifespan, coupled with their resistance to chemical degradation, makes them a cost-effective solution for fuel and chemical sealing applications.
While FKM is widely used, it's important to note that other materials, such as FFKM (perfluoroelastomer), offer even higher resistance to extreme temperatures and aggressive chemicals. However, FKM remains a popular choice due to its balance of performance, availability, and economic advantages for applications with less demanding requirements.
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Frequently asked questions
FKM, also known as fluorocarbon, fluorocarbon rubber, fluoroelastomer, or by the brand names Viton® and Fluorel®, is a type of synthetic rubber.
Yes, FKM is compatible with diesel fuel. It is also compatible with mineral oils and greases, aliphatic and aromatic hydrocarbons, petrol, silicone oils and greases, and certain specialty chemicals.
The working temperature range of FKM is approximately -26°C to +205°C or +230°C. It can withstand even higher temperatures for short working periods.
FKM is commonly used in the sealing industry due to its wide range of chemical compatibility, temperature resistance, low compression set, and excellent aging characteristics. It is also used in aircraft, automobiles, and other mechanical devices that require maximum resistance to elevated temperatures and fluids.
