In this section, we&#;ll look a little more closely at what o-rings do, and some of the applications that they&#;re very often used for.
If you are looking for more details, kindly visit SBT.
O-rings for high-temperature sealing
High-temperature sealing o-rings are, as the name implies, designed to withstand extreme heat while continuing to provide a reliable seal between two surfaces or components.
This makes them ideal for demanding industries and environments such as oil and gas refineries, chemical processing, or any other scenario where a high-temperature seal is required, such as performance transport applications like turbo engines and aerospace engineering.
Best O-ring seal materials for high temperatures
There are a number of popular high-temperature o-ring material choices, including nitrile, hydrogenated nitrile, silicone rubber, polyacrylate and more. Securing the best choice in any given scenario will generally be a balancing act between the specific operating temperature needed, and the most economical material option at that performance point.
For more detail on all types of O-ring materials and designated temperature ranges, feel free to contact our expert support team any time - they&#;ll be glad to offer further advice and assistance on specific high-temperature seals, materials and applications.
O-ring seal temperature ranges
Again, all industrial o-ring purchases should be carefully planned with direct reference to the specific role and environment the seal is required to perform in. However, as a rough guide to o-ring temperature rating and use limits, some of the more popular materials on sale generally operate within the following sorts of temperature ranges:
- Nitrile: anywhere from -50 C to 120 C
- Hydrogenated nitrile: anywhere from -45 C to 150 C
- Polyacrylate: anywhere from -25 C to 175 C
- Ethylene-propylene: anywhere from -50 C to 135 C
- Chloroprene: anywhere from -40 C to 120 C
- Butyl (petroleum compound): anywhere from -55 C to 205 C
- Fluorosilicone: anywhere from -60 C to 205 C
- Fluorocarbon: anywhere from -25 C to 205 C
O-rings for high-pressure sealing
High-pressure resistance is a common requirement of industrial o-rings, along with reliable performance in high temperature and dynamic environments. For a high-pressure seal to work to optimal levels, o-ring design and manufacture again depends on choosing specific materials for better performance under specific conditions.
O-rings function on the principle that even pressure placed on the (more or less incompressible) o-ring material creates predictable deformation patterns around the perimeter of the gasket in its groove. This means there&#;s a fairly uniform mechanical stress placed on all contacting surfaces of an o-ring.
Provided the internal pressure from fluids being contained stays below a given O-ring's contact stress rating, it&#;s largely impossible for leaks to occur, even under high pressure. However, mechanical failure under high pressure can easily cause extrusion or destruction of the o-ring, which is why it&#;s important to choose the right material for the precise environment you&#;re looking to use it in.
O-ring seals for engines
An engine o-ring, especially one used in high performance or turbo engines, is a good example of a product that has to be rugged enough in design and material construction to handle various challenging requirements of temperature, pressure and chemical compatibility.
Many basic rubbers and polymers aren&#;t suitable for use with oils, fuels or solvent-based compounds. For use in an engine, an oil o-ring has to be created specifically from compatible hybrid materials that allow it to maintain crucial o-ring properties (flexibility, incompressibility) while offering more robust resistance to heat, pressure, o-ring leaking and chemical attack than a standard elastomer typically could.
For more advice and information on suitable products to use as engine o-rings, feel free to contact our customer service team through the support pages on our site.
O-ring seals for plumbers
Plumbing o-ring choices are widespread, given the range of materials, sizes and gauges available for use in ducting and pipework applications, as well as to form tight waterproof seals around taps and other fittings. Choosing the best product for the job depends on finding the correct size and shape for the specific role you have in mind.
Food Grade O-ring seals
Food-grade o-rings have been manufactured to more exacting standards of material composition, such that they&#;ve been officially declared &#;food safe&#; for use in the production and preparation of meals, beverages and dining products.
Best food grade O-ring seal materials
An approved food-grade o-ring must only consist of the material(s) declared and approved as food safety compliant in the country of manufacture/sale. In the UK, this applies to natural and synthetic rubbers, elastomers and polymers.
To achieve food grade approval, an o-ring manufacturer must also take into account extractable ingredients/compounds if the seal is to be used in direct contact with aqueous, acidic or fatty foods and drinks. Some common food-safe o-ring materials include EPDM, fluorocarbon, nitrile, neoprene and silicone.
For more information, please visit difference between green and black o rings.
O-ring seals for CO2
Carbon dioxide often presents an issue for many types of o-rings, as softer materials have a tendency to absorb the gas over time and swell up. This can lead to an unreliable seal in the short term, and over time the CO2 will actually cause the o-ring to start to break down from within.
Some popular choices for use in applications where the o-ring will have extended CO2 contact include polyurethane, PTFE, nitrile, and fluoroelastomers. However, the best choice will always depend on the consideration of other environmental or application factors.
O-ring seals for aircrafts
Aircraft o-rings and aerospace o-rings generally need to be highly chemically resistant, and able to operate within a wide range of temperatures and pressures in order to keep an aerospace craft&#;s powertrain running cleanly, efficiently and smoothly. Typical applications include fuel cap gaskets, fuel system o-rings, and valve cover seals.
Common elastomers for use in aerospace-type applications include nitriles, ethylene-propylene, fluorosilicones and more. Because there are so many different sizes and gauges of o-ring distributed throughout most aircraft engines and systems, most sales for aerospace and aeronautics are through bulk orders of multi-size o-ring kits.
Select O-Ring Compounds and Order Online From the World&#;s Largest Inventory Network
Compare o-ring material properties to find and buy the best o-rings compatible with your application environment. Whether you need high temperature o-rings, low temperature o-rings, high pressure o-rings, or o-rings with excellent chemical resistance, allorings.com accesses the world&#;s largest inventory network of high performance o-rings.
With a diversified network of contract manufacturers, the o-rings you need are ready to ship today. Simply click on a material compound below to get started ordering your o-rings online today.
If you need additional help or require custom o-ring specifications, don&#;t hesitate to contact us and we&#;d be happy to help.
Perfluoroelastomers (FFKM, Kalrez®, Markez®, Chemraz®) deliver ultimate chemcial and high temperature resistance, but with a very high cost relative to traditional rubber elastomer sealing materials. Dozens of specialized formulations have been developed to maximize performance in specific application situations like improved low temperature, acid, amines, plasma, steam, food and medical grade, high pressure and explosive decompression resistance.
Fluorocarbon compounds are widely used in chemical, aerospace, and industrial applications. These materials offer excellent chemcial and high temperature resistance. Not recommended for use with steam, amines, or polar solvents. Specialty FKM types and formulations are available for improved low temperature and chemical resistance as well as colors, durometer hardness, food and medical grade, high pressure and explosive decompression resistance.
Aflas® materials exhibit excellent chemical, heat and steam resistance. They have similar properties to FKM, but with increased resistance to bases, amines, sour gasses, steam, and radiation. Aflas® materials can have limited compression set resistance and should not be used with aromatic fuels, ketones, or chlorinated hydrocarbons.
Nitrile rubber materials are the most commonly used general purpose o-ring material because of relative low cost, good mechanical properties, and performance with many basic oils, fuels, and lubricants. Not recommended for use with UV, ozone, steam, harsh fuels or chemicals. Nitrile materials can be formulated to enhance specific physical and chemical resistances like color, durometer hardness, internal lubrication, steam, ozone, high and low temperature performance.
Hydrogenated Nitrile was specifically developed to offer increased temperature and fuel resistance compared to traditional Nitrile (NBR) materials. HNBR compounds also have excellent abrasion, wear, and compression set resistance. Poor resistance to aromatic or chlorinated hydrocarbons, fuels and solvents.
Silicone materials have excellent thermal stability in extreme low and high temperature environments. Silicones have good broad spectrum chemical resistance and are physiologically neutral making them ideal for many food, pharma, and medical applications. Not recommended for dynamic service or for contact with many fuels, mineral oils, or concentrated acids. Silicone can be formulated in a variety colors, durometer hardnesses and variations designed for use in a wide range of demanding specialty applications like medical and EMI shielding.
Fluorosilicone materials are mechanically similar to Silicone (VMQ) but offer increased resistance to fuels and mineral oil at the cost of decreased high temperature resistance. Fluorosilicones have excellent low temperature resistance and are often used in demanding aerospace and automotive applications such as fuel and exhaust systems. Not recommended for dynamic service or for use with concentrated aromatic solvents, amines, esters, and ketones.
Ethylene-Propylene rubber materials are characterized by excellent chemical, steam and thermal resistance for a relative low cost. Often used in food, water, beverage and agricultural systems, hydraulic, braking, steam applications. Not recomended for use with oils and fuels. EP can be formulated in a variety of ways for use in a wide range of demanding specialty applications.
Polyurethane is a type of thermoplastic elastomer that can be formulated in a variety of ways, each yielding very different mechanical properties and resistances. Generally Polyurethanes have excellent wear and abrasion resistance, good weathering resistance, and moderate resistance to oils and lubricants depending on formulation. Not recommended for use in demanding chemical or thermal environments.
For more oil seal manufacturersinformation, please contact us. We will provide professional answers.
Comments
Please Join Us to post.
0