Choosing the Best High-Temperature Elastomers
Industrial elastomers prevent leakage, while combining all the functionalities together. While finding elastomers for low temperatures are not very difficult, the ones for high temperature applications are relatively difficult. This is due to the fact that standard sealing materials don’t do well in extremely high temperatures.
With excessive heat degrading rubber materials, resulting in a dip in performance. This can cause leakage high-temperature applications need high-temperature elastomer with reliable performance.
High- temperature applications comprise of production of ethylene, solid oxide fuel cells, steam and gas turbines, and industrial exhaust systems. Such applications include chemicals, immense heat, and strong fluid transfer. Traditional elastomers lose their physical integrity quickly in such environments, and this can degrade the performance.
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Silicone Rubber
Silicone Rubber can stand a temperature of up to 230⁰C. It has high-temperature resistance, with some compounds withstanding temperatures up to 305 °C. It is resistant to UV rays, oxygen, and ozone. It has got great electrical insulation properties, and high gas penetrability. It is commonly used in the making of automobile gaskets and aerospace seals.
Fluorosilicone elastomer has high liquid resistance and extreme temperature constancy of silicone. With an above 400⁰F temperature, fluorosilicone O-rings can be left in sunlight, and there will be no degradation because of ozone layer, air, aromatic, or chlorinated hydrocarbons.
PTFE
It is a one of the dependable polymer materials that can fight strong industrial chemicals, and uphold its integrity in above 500⁰F temperatures. PTFE offers the minimum friction as opposed to other options. Furthermore, this acts as an outstanding electrical insulator. PTFE is also unfazed by most chemicals. It is tremendously resistant to high temperatures, has exceptional electrical properties, excellent release surfaces and superior resistance to chemicals. This is used in HVAC, plumbing , electronic appliances, pharma, automotive more.
FKM
It is an excellent high-temperature-resistant elastomer, retaining good mechanical properties and chemical resistance, at very high temperatures. Owing to its extensive temperature range, low compression susceptibility, chemical compatibility, and excellent aging characteristics, fluorocarbon elastomers are commonly used in the seal industry.
Fluorocarbon elastomers are extremely fluorinated carbon-based polymers put to use in applications for resisting harsh chemical attack. Fluorocarbon O-rings are used in automobile, aircraft, and other mechanical devices needing supreme resistance to high temperatures and non-flammable hydraulic fluids, mineral oils and greases, silicone oil, fuels etc.
EPDM
It is a versatile material used in numerous applications, from automotive products to HVAC parts. This is an affordable alternative to silicone, as it can bear weather conditions and other challenges for long.
This synthetic high-temperature-resistant rubber has a fine heat resistance, up to +150°C. It resists UV exposure, aging, ozone, weathering.
HNBR
These elastomers are made from NBR, this has a resistant to higher temperatures, have better resistance and are strong. It is derived from conventional nitrile rubber. HNBR is an exceptionally high-temperature-resistant rubber that can withstand much higher temperatures than conventional nitrile up to +150 °C. It also offers good abrasion resistance.
It is used in the making of c seals and gaskets, particularly for the oil and gas industry. It is well-matched with automotive oils, fuels and gases, for example hydraulic fluids, aliphatic hydrocarbons, and dilute acids.
Coming to a Close
Due to the use of high-temperature elastomers in automotive and other industries, the demand for the same will be on the rise in the years to come.
SOURCE: PS Intelligence
