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Therefore, many AS568B sizes are interchangeable with an ISO size. We knowthat your time is valuable. Standard FKM materials have excellent resistance to mineral oils and greases, aliphatic, aromatic and chlorinated hydrocarbons, fuels, non-flammable hydraulic fluids (HFD) and many organic solvents and chemicals. greater than 250 mm, or 5% for O-rings with an I.D. Learn more about O-Ring sizes using the links below to explore their dimensions in an interactive chart. View Japanese Metric Sizes (JIS)View European Metric Sizes (DIN). for Ordering or any questions that you might have. This design increases their working pressure, and form fit more snugly in some spaces. Volume change is the increase or decrease of the volume of an elastomer after it has been in contact with a fluid, and is measured in percent (%). It is important to consider the groove fill of the installed O-ring to avoid detrimental effects on radial sealing performance. DeltaFlex is committed to providing you with the best engineeringsupport experience possible. This also creates a lubricant reservoir formed between the sealing lips that improve performance when startup pressures are exerted. The first five series are based on cross-sectional diameter. Request a quote and have it shipped the same day! The AS568A sizing is completely interchangeable with O-Rings, Quad Rings and Square Cut O-Rings. O-rings and seals from Parker are available in standard sizes and compounds including Viton FKM fluorocarbon O-rings, silicone O-rings, Kalrez O-rings, perfluoroelastomer FFKM O-rings, buna nitrile O-rings, Aflas O-rings, urethane O-rings, fluorosilicone O-rings, metric Viton O-rings, neoprene/chloroprene metric O-rings, and encapsulated O-rings. AS568 Size 2-011 Silicone 50 Durometer, meeting AMS 3304) FKM materials are noted for their very high resistance to heat and a wide variety of chemicals. The G series has 445 sizes and the the A series has 383 sizes. O-rings are the most widely used seal in history because of its simplicity, low cost, ease of installation and small space requirements. Other key benefits include excellent resistance to aging and ozone, very low gas permeability and the fact that the materials are self-extinguishing. We make every effort to answer your inquirypromptly; inquiries requiring extensive research may take longer and will be answered as soon as possible. Anti-Extrusion devices ares thin rings made of hard plastic materials such as PTFE, Nylon, and PEEK. Your OEM & Maintenance Supply Headquarters. 262.632.2345. > Square rings can be used in static applicaions where high sealing load forces is required. ISO cross-sectional diameters differ from the Aerospace Standard by less than 0.001 inch. That document, published by the Society of Automotive Engineers (SAE), lists the sizes of O-rings in six series or groups in both inches and millimeters. from the SAE (Society of Automotive Engineers). The distortion of the O-rings resilient elastic compound fills the leakage path, thus, creating a seal. The Quad Ring has replaced the Square Cut in most cases. When the Quad Ring is squeezed upon installation, they seal with the 4 small contact surfaces on the top and bottom. Seal & Design is pleased to offer Silicone Engineerings family of high-quality silicone materials and products. General descriptions are provided below for some of the more common o-ring sealing elastomers. Silicone materials offer outstanding temperature resistance across a broad range from -80F to +400F. Square Cut O-Rings have been largely phased out by elastomeric sealing manufacturers since the invention of the Quad Ring, or commonly also called a Q Ring or X-Ring. The O-ring's outside diameter (O.D.) Further information regarding compatibility with specific chemicals can be obtained in the chemical compatibility tables here or in the PDF Library. O Rings Email: doncaster@fpeseals.com, Telephone: +44 (0)1224 648999 Email: sales@fpeseals.com. Seal & Design has all these sizes and more. Our goal is to provide you with most efficient and effective engineering support. "Frequently vibration isolation problems require a system engineering analysis" -Put us to work for you. QUAD RINGS, sometimes called double seal o-rings, have four sealing surfaces that provides twice the number of sealing surfaces when compared to that of a standard O-ring. However, it is not typically a concern for face type seals as the metal parts to be sealed are in contact, line-to-line. If your application uses a Square Cut O-Ring, consider switching to the Quad Ring. The standard sizes used in the United States are defined by Aerospace Standard AS568B, Aerospace Size Standard for O-rings. Spring Energized Seals for hydraulic fluid sealing. The sixth series includes 20 sizes for boss seals. Ethylene propylene has a temperature range from -65 to +300F (-54 to +150C) for most applications. The A series is used for aerospace applications where tighter tolerances are recommended. AS568 O-rings are an SAE standard most commonly used. Rocket Seals, Inc. 1297 S. Lipan St. Denver, CO 80223, Local Number: 303.777.7024 Local Number: 303.777.7024, Toll Free: 1.800.445.7803 Toll Free: 1.800.445.7803, Standard and Metric O-Ring and Splicing Kits, Vee Packing, Nylon Top & Bottom Bearings and Wiper Kits, Water Treatment, Wastewater and Filtration, Oil and Gas, Power Generation and Chemical Processing, MUUL style Metric Urethane Loaded U-seals, MUU style metric unloaded symmetrical U-seals, MUSN style metric unloaded symmetrical U-seals, MUFN-P style metric unloaded symmetrical U-seals, BS (DRTU) style Standard Unloaded Rod U-seals, DPU Style Standard Unloaded Piston U-Seals, DSU style Standard Unloaded Symmetrical U-seals, HU style Standard Unloaded Symmetrical U-seals, 8400 style Standard Unloaded Symmetrical U-seals, Available Materials of Square Cut O-Rings.pdf. Our applications engineer willhelp find the right solution for your application. Once you have the AS568 dash size you need, select a compound from the Chemical Compatibility table. > The primary uses of fluorosilicone materials are in fuel systems at temperatures up to +350F (-i-177C) and in applications where the dry-heat resistance of silicone is required but the material may be exposed to petroleum oils and/or hydrocarbon fuels. Email: sales@swanseals.co.uk, Telephone: +31 (0)1625 81060 We knowthat your time is valuable, sowehave already filled-in some of the information for you. It is important to note that there are significant differences in the coefficients of thermal expansion between the O-ring material and the groove materials. Neoprene is moderately resistant to both petroleum oils and weather (ozone, UV, oxygen). Silicone materials provide excellent resistance to sunlight, ozone, oxygen, UV light, and moisture. NBR quad rings are available in standard AS568A sizes. The G series is used for general purpose applications and includes a wide range of inside diameters. O Ring - Square. The high temperature limit for fluorosilicone is limited because temperatures approaching +350F may degrade certain fluids producing acids which attack the fluorosilicone elastomer. O-rings are designed for both static and dynamic applications. EPDM has won broad acceptance because of its excellent resistance to phosphate ester type hydraulic fluids. A properly designed O-ring groove allows the O-ring to be squeezed diametrically out-of-round even before the pressure is applied. For hydraulic and pneumatic rod sealing applications Designed for extreme and demanding applications. Thank you for taking the time to learn about DeltaFlex and requesting a quote for our . The O-ring's O.D. The following table is grouped by CS (cross-section) andlistedby ID (inside diameter). BACK UP RINGS are typically made from NBR 90A, FKM 90A or PTFE. Be sure to consult ISO 3601-1 for specific dimensions, as inside diameters may differ. Barrington Way, Darlington, Co Durham, DL1 4WF, Telephone: +44 (0)1325 282732 NBR is generally not resistant to aromatic and chlorinated hydrocarbons, fuels with a high aromatic content, polar solvents, glycol-based brake fluids and non-flammable hydraulic fluids (HFD). DeltaFlex supplies the complete range of standard AS568 sized O-Rings. DeltaFlex is committed to providing you with the best customer experience possible. If you have any questions, please fill out the form below and a Rocket Seals technical expert will get in touch with you shortly. We use cookies to ensure that we give you the best experience on our website. Reduced O-Ring C/S at % ID Stretch (Inch/mm). Back up rings are designed for high pressure applications to prevent the o-ring from migrating into the sealing gap. Here is an interactive chart for standard o-ring dimensions. smaller than 20 mm, this is not always possible due to tolerance issues, which can result in a greater O-ring O.D. FKM materials are generally not resistant to hot water, steam, polar solvents, glycol-based brake fluids and low molecular weight organic acids. Configurations include solid, split, spiral and contoured. Headquarters: Clarence, NY(716) 759-3344Info@SealAndDesign.com, Higbee Division: Syracuse, NY(315) 432-8021HB.Info@SealAndDesign.com, Seal & Design Canada: Toronto, Ontario(416) 741-7005Toll-Free: 1-866-242-3770ca.Gasket@SealAndDesign.com. > Rocket Seals is the leading distributor for O-Rings and many other seals. Seals The first five series are based on cross-sectional diameter. The metric sizes are further broken down by region, notably Europe and Japan. We supply all styles of O-rings. However, as you increase the durometer, the O-ring can become less malleable. Halogenated hydrocarbons (carbon totrachlorido, trichloroethylene). This is a general rule and there may occasionally be exceptions. The more information you can provide upfront, the more diligent we can be in getting a quote to you or assisting you with your request. EPDM materials generally have a high resistance to hot water, steam, aging and chemicals, and are suitable for a wide range of application temperatures. With flat edges, square rings , cover more surface than round O-rings, Available in Nitrile rubber and other materials, Cannot find what you need then call or email us, Telephone: +44 (0)1325 282732 The standard sizes are also used for most military specifications. should not exceed 3% of the rod gland diameter for O-rings with an I.D. Parker Viton O-rings are available in both standard and metric sizes, often available from inventory. All configurations are available in standard AS568A sizes and some metric sizes. View Chart, O-RingsGasketsRubber MoldingEMI ShieldingThermal ManagementGore VentsSponge & Foam SealsAdhesives & Sealants, IndustrialCommunication & ITMilitaryAerospaceFluid PowerElectronics, Applications EngineeringFabrication & ConvertingValue Added Services, AboutQualitySuppliersBlogLiteratureVideosCareers, Copyright 2022 Sealing Devices Inc.Privacy Policy | California Disclosures | Terms & Conditions. Square Cut O-Rings are exactly like normal O-Rings, except that their cross-sections are square instead of circular. Fluorosilicone elastomers have the same mechanical properties as silicone but are resistant to solvents, fuel, and oil (similar to Viton). For dynamic applications, 10 or 15 % volume swell is a reasonable maximum, unless special provisions are made to the gland design. Should you have any questions, our team of applications engineers can help, contact us. A chart listing the most popular compounds and their fluid compatibility / technical information. Another option would be to use an anti-extrusion device. The more information you can provide upfront, the more diligent we can be in assisting you with your request. The gland fill is the percentage of the gland that is occupied by the O-ring. Customer Support No. The four-lobed design not only provides lower friction than the Square Cut O-Ring but also, due to its square cross-section, it resists spiral twist. AS568 O-ringSize Standard isfrom the SAE (Society of Automotive Engineers). Please let us know what you're interestead in, It is inert to most chemicals and solvents with very few substances that degrade the material (notably fluorine, chlorine trifluoride, and molten alkali metal solutions). Static Seals & O Rings Our goal is to provide you with most efficient and effective customer service. O-ring seals are a round cross sectioned sealing device available in a variety of materials (elastomers) and standard AS568A, metric and Japanese Industrial Standard (JIS) sizes. CastUrethane The Quad Ring offers many advantages over the Square Cut. Our goal is to provide you with most efficient and effective customer support. We can provide virtually any required size. Currently, ISO sizes do not use a dash numbering system like the Aerospace Standard. interference. Refer to the standard O-ring size chart below to help you find the AS568 O-ring size you need. Contact Us, Compare O-Ring materials and O-Ring chemical compatibility with this chart. ( Ex. Engineered urethane foam is excellent for absorbing shock. > NBR is the most commonly used material for o-rings because of its good mechanical properties, its resistance to lubricants and greases and its relatively low cost. The standard AS568A size chart is available in the downloads section of this website. If your application has a unique environment or requires a special size please contact our sales staff and we will be glad to help. PTFE is a completely fluorinated polymer that is the most chemically resistant polymer available. NBR also has low resistance to ozone, weathering and aging. Thank you for taking the time to learn about DeltaFlex and our . Silicone materials are physiologically harmless so they are commonly used by the food and drug industries. The standard sizes used by O-ring manufacturers in the United States are defined by Aerospace Standard AS568B, Aerospace Size Standard for O-rings. Standard grades of NBR are typically resistant to mineral oil-based lubricants and greases, many grades of hydraulic fluids, aliphatic hydrocarbons, silicone oils and greases and water to about 80C (190F). Square O-Rings are still available from some manufacturers, but they typically require tooling charges and/or large quantity orders to produce them. Once in place these rings will provide essentially zero clearance. Should you have an urgentmatter, contact usby phone. Request a Quote, When specifying O-Rings be sure to include the standard dash size, material, and durometer along with any other requirements or standards. Standard metric sizes for O-rings are defined by International Standard ISO 3601-1:2002: Fluid power systems O-rings Part 1: Inside diameters, cross-sections, tolerances and size identification code. One of these methods is to simply increase the durometer rating of the O-ring. For O-rings with an I.D. As a custom high volume fabricator, Seal & Design is currently manufacturing large scale productions of disposable medical face shields. They are divided into sulfur-cured and peroxide-cured types. Unless the bore and the piston or rod remain concentric by the hardware, this can cause the entire gap to shift to one side, creating a diametrical gap (see diagram below). The difference between the original O-ring cross-section and the final O-ring cross-section once installed is known as the compression squeeze. So, wehave filled-in some of the information for you. The more information you can provide upfront, the more diligent we can be in assisting you with your request. put DeltaFlex to work for you. or call us today at 877.740.0170, 2016 - 2022 Advanced Gasket & Supply Inc. | All Rights Reserved, Ethylene glycol based fluids (Hydrolubes), Phosphate ester based hydraulic fluids. Thank you for taking the time to learn about DeltaFlex and our . Manufacturing, Imperial (ISO 3601/AS-568) O-Ring Size Charts, Metric (JIS B 2401, DIN 3771) O-Ring Size Charts. PTFE is also very slippery and repels virtually everything making it perfect for applications that require a high coefficient of friction. SQUARE CUT O-RINGS have a square cross section and utilizes the same standard AS568A size chart that the round cross section o-ring uses. Cross-sectional diameters range from 0.040 to 0.275 inch. Extrusion is a concern for radial seals where there is gap between the piston and the bore or between the rod and the bore. For non-standard or larger sizes we offer non-molded, spliced and vulcanized O-Rings for select materials. Standard was developed for use in the United States, while the international community uses metric sizes. should be at least equal to or larger than the rod gland diameter to give interference on the O-ring's O.D. Groove fill of the installed O-ring should not be more than 85 % to allow for possible O-ring thermal expansion, volume swell due to fluid exposure and effects of tolerances. The standard sizes are also used for most military specifications. It is calculated by dividing the cross-sectional area (CSA) of the O-ring by the cross-sectional area of the gland. Excellent resistance to almost all chemicals, Not subject to aging, so a near infinite shelf / storage life, Can be use in food, chemical and medical industries. Elastomers can have coefficients of thermal expansion 7 to 20 times higher than that of metals, such as steel. There are different methods to counter O-ring extrusion. ID Inside Diameter OD Outside Diameter CS Cross Section .070 .103 .139 .210 .275. After you have submitted this form; you will receive a confirmation that we have received your inquiry. our application has a unique environment or requires a special size please contact our sales staff and we will be glad to help. For static O-ring applications volume swell up to 30 % can usually be tolerated. There are two main o-ring sizing types: standard and metric. Thank you for taking the time to learn about DeltaFlex and requesting a quote for our, "Frequently vibration isolation problems require a system engineering analysis" -, Rubber Parts | Rubber Manufacturer | LORD Mounts | LORD Isolators. smaller than 250 mm. Email: info@fpeseals.com, FPE Seals Ltd EPDM materials are completely unsuitable for use with all mineral oil productslubricants, oils, fuels. Some of the most common elastomers appear below along with some application and chemical resistance data. PTFE can withstand a very wide temperature range from -300F to +500F. Email: sales@fpeseals.com, Telephone: +44 (0)1302 727252 There are 369 standard sizes. Silicones are generally not resistant to fuels, aromatic mineral oils, steam (short term to 120C possible), silicone oils and greases, acids, or alkalis. O-Ring Groove design plays an important part in how an o-ring seals. Copyright 2022 All Rights ReservedDELTAFLEX. The concern with extrusion is that at a higher pressure (especially with soft elastomer O-rings), the O-ring can be forced into the small gap between the piston or rod, and the bore. Inside diameters range from 0.029 to 25.940 inches. DeltaFlex is committed to providing you with the best customer support possible. Click to Request a Quote The square cut o-rings are typically stocked in NBR. That document, published by the Society of Automotive Engineers (SAE), lists the sizes of O-rings in six series or groups in both inches and millimeters. That standard groups metric sizes into two series, G and A. Peroxide-cured compounds are suitable for higher temperatures and have much lower compression sets. (Skydrol, Fyrquel, Pydraul), Di-ester based lubricants (MIL-L-7808, MIL-L-6085). Silicone offers poor tensile, tear, and abrasion resistance and is not recommended for use in dynamic applications. KasPex PEEK, BoKure Urethane, and RyFlor are trademarks of Hi-Tech Seals Inc. The sixth series includes 20 sizes for boss seals. PTFE is not crossed-linked like a regular elastomer and therefore has poor elastic memory, can deform under constant compressive load and can be damaged during installation. Thank youforputtingDeltaFlex towork for you. Neoprene is classified as a general purpose elastomer which has relatively low compression set, good resilience and abrasion, and is flex cracking resistant over a temperature range of -40F to +225F.