O-rings and seals are used in a wide range of industries to help you tightly seal the connections in pipes, tubes, and other elements of complex hydraulic and pneumatic systems. 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. In the UK, this applies to natural and synthetic rubbers, elastomers and polymers. Being nearly as inert as Teflon, Kalrez is one of the best options for chemical processing, oil and gas, and semiconductor manufacturing.. PTFE yields some of the toughest O-rings on the market with an outstanding temperature range of -300 to 450F. Metallic o-rings and metal o-ring seals are often found where an extra hard-wearing gasket is required in high temperature or high-pressure components, in heavy machinery and industrial sectors. To learn more about Arizona Sealings personalized service and extensive product line,request a quotetoday. As a general rule, the lower the clearance, the higher the pressures the o-ring can tolerate before being extruded. Although silicone is well-known for medical-grade and FDA-compliant sealing applications, silicone rubber is also a solid choice for extreme temperature static sealing due to its heat and cold resistance. 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.
Food-grade o-rings have been manufactured to more exacting standards of material composition, such that theyve been officially declared food safe for use in the production and preparation of meals, beverages and dining products. While all o-rings require some degree of lubrication in order to perform to optimal levels, dynamic o-rings require heavier and more frequent lubrication (as well as more regular checking, maintenance and replacement) than static versions. However, while O-rings largely look alike and function similarly, there are actually key distinctions that determine where an O-ring may be used. Custom sizes, profiles, materials and durometers are also available upon request. Available in standard translucent or black 70 or 90 durometer, with custom colors available. Most o-rings are designed to operate at pressures up to 1,500 psi with an extrusion clearance gap of less than .04". Typical applications include fuel cap gaskets, fuel system o-rings, and valve cover seals. Parkers Buna-N compound, which ranges from 70 to 90 durometer hardness nitrile, withstands temperatures from -30F up to 250F which includes compounds N0674. The properties of neoprene make it well suited for a variety of sealing applications, including air conditioning and refrigeration. Butyl is the classic choice for vacuum-sealing, providing extremely low permeability to gases. Abrasion and extrusion resistant materials should be considered as well as smaller clearence gaps, backup rings or metal spring energized PTFE seals for pressure cycling applications. Chief among these considerations is material selection. Static and dynamic O-ring seal design differs in a few key ways. Viton o-rings are a popular alternative to the widely-used nitrile seals. There are numerous types of O-ring materials available and each offers different features and benefits. The trade-off is that PTFE is difficult to install, having very limited elastic memory and poor tear resistance. Nitrile - also known as NBR - is probably the most widely used elastomer in the seal industry at the time of writing. A synthetic rubber providing excellent chemical resistance and heat resistance. Types of Solenoid Valves - The Hope Group, A SunSource Company, The Hope Group Joining Forces With SunSource. Rocket Seals distributes high pressure O-rings and high pressure hydraulic O-rings from reputable manufacturers. Since 1980, our solutions have delivered reliable, long-lasting success for customers worldwide. The trade-off is that PTFE is, Arizona Sealing Devices, Inc. has extensive experience with all of these elastomers, and we take pride in matching our clients to the materials that will suit them best over time. Resistant to: Most chemicals, excluding alkali metals, fluorine, a few fluoro-chemicals such as chlorine tri-fluoride and oxygen difluoride, Not recommended for: Applications requiring O-Ring stretch and compression. 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. An O-ring supplier since 1989, we have since become an ISO 9001:2015-certified distributor of a broader range of sealing products, including, To learn more about Arizona Sealings personalized service and extensive product line,, consider your applications needs and limitations, Silicone O-Rings and Sealing Devices Guide. 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.
Finding the correct nitrile o-ring for the job will depend on getting the right grade to stand up to the task at hand.
Compared to cast polyurethane, it has a lower tensile strength and weakens at high temperatures., Kalrez features exceptional chemical resistance, and theres virtually no industrial chemical that will cause it to degrade (although Kalrez O-rings will swell in the presence of certain solvents). As a result, our clients return to us again and again for guidance and reliable elastomer products. 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. At higher pressures and larger clearance gaps, the o-ring material must have enough strength to resist extruding into the clearance gap. These O-rings can be used with or without backup rings. Most popular elastomer O-ring material. At very high pressures, the seal must avoid extrusion into the clearance. They are particularly valuable in aircraft engines and automotive fuel handling systems because they resist swell in high-octane and oxygenated fuels. Rocket Seals distributes high pressure O-rings manufactured in standard inch and metric sizes as well as custom configurations. Silicone rubber compounds typically offer very good resistance to ozone, acids, water, and decent resistance to weathering and heat, making them great for outdoor applications. HNBR compounds also have excellent abrasion, wear, and compression set resistance. Like cast polyurethane, it does well under dynamic, heavy loads, even when used outdoors. Available in standard back or custom colors. Silicone and Kalrez O-ring materials are also widely used, especially in high temperature applications. In this guide, we consider common O-ring materials in detail, including their strengths, limitations, and common applications. Available in standard black or brown 75 durometer, with custom colors available. Abrasion and tear resistance may also be of importance, especially in dynamic applications or when abrasive substances are involved. Primary considerations for O-ring material selection include chemical compatibility, applicationtemperature compatibility, sealing pressure,durometer, size and cost.
As noted above, youd use an o-ring very similarly to the way youd use any other type of gasket: the elastomer-based circular cross-section sits in a specially engineered groove (the geometry of which is fairly universal), where it becomes compressed between two or more parts once theyre assembled and interlocked. Arizona Sealing Devices, Inc. has extensive experience with all of these elastomers, and we take pride in matching our clients to the materials that will suit them best over time. In dynamic applications, if the friction of the moving metal surface across the o-ring is in the same direction as the pressure, the o-ring can potentially be dragged into the gap. Due to many applications, there is also a wide variety of O-ring material choices available. Silicone O-rings have many outstanding properties, including excellent flexibility and fatigue life, strong ozone, and UV radiation resistance. All of the above elastomer families as well as those specials not listed are available in many specialty formulations.
Not recommended for use in demanding chemical or thermal environments.
Phosphate ester hydraulic fluids, brake fluids and halogenated hydrocarbons are damaging to nitrile, and its not the best choice for high temperature or pressure demands, The nitrile o-ring temperature range is usually anywhere from -50 C to 120 C. Rubber o-rings are perhaps the most common type, serving an enormous array of purposes and functions in less specific or demanding applications than some of the higher-tech variants seen in heavy industrial environments. The correct material selection is key when purchasing an O-ring for high pressure applications. Global O-Ring and Seal, LLC is a master distributor of O-Rings, Backup Rings, X-Rings, Cord Stock, and related seals, servicing industrial distributors worldwide. Ethylene propylene is often used outdoors where weather resistance is a concern, as well as in automotive cooling and brake systems. Ace Seal offers a broad range of O-ring materials in different colors and sizes to meet your sealing application requirements. Available in standard black. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); [] to select a sealing material that stands up to the demands of media flowing through the valve. As an authorized Parker distributor in addition to standard O-ring materials mentioned above, The Hope Group also offers custom seals that are designed exclusively for your specific application. The resulting o-ring seal is both economical and reliable, as well as relatively resilient and easy to maintain/replace when needed. Therefore, manufacturers, including Parker, solve this problem by mixing PTFE material with various fillers to provide users with more flexibility.
Silicones have good broad spectrum chemical resistance and are physiologically neutral making them ideal for many food, pharma, and medical applications. We offer the largest inventory of specialty and standard sealing solutions backed by best-in-class technology, service and support. Resistant to: Petroleum base oils and fluids, some phosphate ester base fluids, silicone and silicate ester base lubricants, acids and halogenated hydrocarbons. 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. Hydrogenated Nitrile was specifically developed to offer increased temperature and fuel resistance compared to traditional Nitrile (NBR) materials.
Aflas is another elastomer that offers a combination of chemical, thermal, and electrical resistance properties, resisting acids, bases, and heat up to 446F. We carry a full range of AS568 standard sizes, as well as metric sizes and O-Ring cord stock. Well respond to your request within 1 business day. Standard silicone o-ring temperature range is generally quite wide, from very low to reasonably high. They have similar properties to FKM, but with increased resistance to bases, amines, sour gasses, steam, and radiation. We Will Open at 8 am CST on Monday. All Rights Reserved. In this sense, theyre effectively a type of gasket - the main difference being that o-rings are more commonly used in very high-pressure environments, where a normal cork, paper or rubber gasket would likely be prone to failure. Whether sold individually, in large wholesale batches or - as is increasingly common - as part of a highly flexible range of o-ring kits, the basic form and role of o-rings are generally the same across the board. (408) 513-1070 or (800) 223-7325
They were first brought to market way back at the dawn of the 20th century - and yet, for all their absolute simplicity and the very basic nature of the role they perform, theyre still incredibly widely used today. High-durometer o-rings are better suited for higher pressures and are more resistant to extrusion. Welcome to the world's largest database of specialty and standard sealing products. Has an operating temperature range of -60 to 300F (-51 to 150C) and a hardness range of 40-90 durometer. These properties make them a popular choice for many applications, including aircraft and automotive industries. A modern alternative to butyl, ethylene propylene exhibits low gas permeability alongside excellent heat, weather, and ozone resistance. Contact usfor more information about our O-ring materials orrequest a quoteon your custom application today.
Has an operational temperature range of -40F to 250F (-40C to 121C) and a hardness range of 40-90 durometer. If you need additional help or require custom o-ring specifications, dont hesitate to contact us and wed be happy to help. The chart shows generally recommended pressure to clearance, gap of o-ring durometer with and without backup rings at typical room temperature. Compare to Kalrez 0040, Higher temperature AED, resistance to Sour gas and associated chemicals and steam Compare to Kalrez 7090, Kalrez 3018 and Chemraz 510. View theCommon O-Ring Materials PDFfor an overview of material specifications. However, fluorosilicone is not a good choice for dynamic sealing of any kind due to its low strength and limited abrasion-resistance.. As such, nitrile/Buna-N O-rings are the ideal choice for automotive, aerospace, and marine fueling. Polyurethane should not be exposed to strong acids, bases, or brake fluids, limiting some of its potential transportation applications despite the materials capacity to carry heavy loads.
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