With our Swiss quality standards and U.S. manufacturing know-how, Datwyler is one of the few manufacturers approved to supply Qualified Products List (QPL) O-rings for aerospace and defense applications. QPL-listed compounds are compounds for which a manufacturer has received approval to sell to a certain specification. Each compound must complete rigorous independent laboratory testing to receive approval. The Aerospace and Defense industry buys product from only QPL-listed suppliers. The QPL list is maintained by Performance Review Institute (PRI) and the Wright-Patterson Air Force Base Material Laboratory. Find out more about our broad selection of approved products.

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Suppliers of drinking water systems know that access to markets throughout the world requires that their products be certified to NSF/ANSI Standard 61 (“NSF 61”). NSF 61 sets limits for the amount of chemicals permitted to leach into drinking water from the materials used in water transmission and distribution. With years of experience in providing seals that meet NSF 61, Datwyler’s Parco brand offers O-rings and custom molded seals in both sulfur-cured and peroxide-cured compounds, specially formulated to resist chloramines. You’ll find a list of the best NSF listed compounds for your application, and an easy link to get in touch with us to discuss your requirements further.

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FKM (Fluoroelastomer) compounds are best known for their exceptional chemical resistance to a wide range of fluids, including fuels, oils, acids, and solvents. O-rings made from FKM are often used in demanding industrial applications where resistance to harsh chemicals and high temperatures is required, such as in aerospace, automotive, and oil and gas industries.Explore further to see our broad selection of FLUOROCARBON RUBBER – FKM O—rings, and select the criteria you need to find the best possible solution for your application.

Discover our comprehensive range of QPL, NSF and UL-listed compounds, FDA-compliant compounds, plus compounds specifically created for military and aerospace use. With over 80 years of compound formulation experience, Datwyler’s got the solution you need.

Datwyler’s Parco brand is a trusted, experienced industry leader in military and aerospace O-rings for system-critical environments. We offer materials to meet military and aerospace specifications, supply Qualified Products List (QPL) rubber seals, and maintain AS9100 and AC7115 certifications of our quality system.

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Find out more about our extensive range of materials. From HBR and EPDM, to silicone rubber (VMQ) and fluorosilicone (FVMQ), Datwyler’s got you covered for almost any application.

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Chroloprene rubber (Neoprene™ ) is a monochlorinated butadiene polymer that offers you good resistance to weathering and petroleum-based lubricants across a wide temperature range. With good abrasion and tear resistance, consider chroloprene rubber for heating, ventilating and air conditioning (HVAC) systems, refrigeration units, and numerous dynamic applications.Explore further to see our broad selection of CHLOROPRENE RUBBER – CR (Neoprene™) O—rings, and select the criteria you need to find the best possible solution for your application.

Silicone compounds have a backbone of alternating silicon and oxygen atoms rather than carbon linkages and are classified as inorganic materials. The siliconoxygen bond is flexible at low temperatures and has better heat stability than the carbon-oxygen or carbon-carbon bonds of organic materials. And since the silicon-oxygen linkages are completely saturated, silicone elastomers are immune to many types of chemical attack that degrade organic elastomers with unsaturated carbon bonds. Silicones offer you excellent resistance to ozone, UV radiation, fungal and biological attack, and extreme temperatures. Consider silicone seals for static applications in cryogenics and refrigeration, as electrical insulators, for transformer oils, and for dry heat exposure.Explore further to see our broad selection of SILICONE RUBBER – VMQ O—rings, and select the criteria you need to find the best possible solution for your application.

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Tetrafluoroethylene propylene copolymers (Aflas®) compounds offer you almost universal resistance to both acids and bases, steam, acid gases, crude oil and many types of corrosion inhibitors. With combined resistance to corrosion inhibitors and heat, Aflas® seals are able to resist the extremes of heat and pressure present in aggressive downhole oil well environments. Aflas® seals have very low rates of gas permeation and are highly resistant to explosive decompression, making them excellent choices for downhole packing elements.Explore further to see our broad selection of TETRAFLUOROETHYLENE PROPYLENE – TFP (Aflas®) O—rings, and select the criteria you need to find the best possible solution for your application.

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Datwyler is a leading supplier of O-rings and custom rubber seals for UL 157. Underwriters Laboratories Inc. (UL) is an independent, not-for-profit product-safety testing and certification organization. UL tests and certifies certain products to ensure the safety of end-use applications. To quickly find the best UL-listed compound for your application, please see the table below. If you need a UL-listed compound for a specific fluid, please contact us for quick feedback from our lab.

HNBR (Hydrogenated Nitrile Butadiene Rubber) compounds offer excellent resistance to oil, fuel, and other petroleum-based fluids, similar to nitrile (NBR) compounds. However, HNBR provides enhanced temperature resistance, ozone resistance, and chemical resistance compared to traditional NBR. O-rings made from HNBR are commonly used in applications where exposure to high temperatures, harsh chemicals, and automotive fluids is expected, such as in automotive engines, oil and gas industries, and hydraulic systems operating in demanding environments.Explore further to see our broad selection of HYDROGENATED NITRILE – HNBR O—rings, and select the criteria you need to find the best possible solution for your application.

Use our O-Ring filter to explore our comprehensive selection of standard and custom Parco O-Rings. You’ll find detailed info and specs – and can quickly request a quote online.

At Parco, we specialize in providing robust, contoured rubber back-up rings, engineered to reinforce O-rings in high-pressure environments.

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Fluorosilicone has an inorganic silicone-oxygen polymer backbone like silicone, while incorporating fluorine-rich polar groups that provide you with resistance to non-polar fluids such as hydrocarbon fuels. While silicones have ASTM D2000 ‘D’ or ‘E’ fuel resistance designations, fluorosilicones are classified as ‘K’, the highest level of fuel resistance. Fluorosilicones” heat resistance is slightly below that of silicones, and share silicones¨ outstanding ozone, sunlight, and weathering resistance. They find their widest use in challenging military, aerospace, and automotive environments involving exposure to fuels over wide temperature ranges.Explore further to see our broad selection of FLUOROSILICONE – FVMQ O—rings, and select the criteria you need to find the best possible solution for your application.

EPDM (Ethylene Propylene Diene Monomer) compounds are best known for their excellent resistance to weathering, ozone, and aging, making them ideal for outdoor applications. O-rings made from EPDM are commonly used in sealing applications where exposure to sunlight, moisture, and temperature variations is expected, such as in automotive weather sealing, outdoor lighting fixtures, and HVAC systems. Additionally, EPDM offers good resistance to water, steam, and some chemicals, making it suitable for a variety of industrial sealing applications.Explore further to see our broad selection of ETHYLENE-PROPYLENE-DIENE RUBBER – EPDM O—rings, and select the criteria you need to find the best possible solution for your application.

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Nitrile (NBR, or Buna N) compounds are copolymers of acrylonitrile and butadiene; the acrylonitrile provides you with resistance to petroleum-based fluids such as oils and fuels, while butadiene gives you low temperature flexibility. Nitrile compounds provide excellent service with gasoline, crude oil, power steering fluid, hexane, toluene, water, water-based hydraulic fluids, and dilute bases such as sodium hydroxide.Explore further to see our broad selection of NITRILE BUTADIENE RUBBER – NBR O—rings, and select the criteria you need to find the best possible solution for your application…

Datwyler’s Parco O-rings are your source for standard and custom O-rings that bring together operational excellence and material innovation – all with a powerful combination of U.S. manufacturing know-how and Swiss-quality DNA. That combination makes Datwyler uniquely positioned to address whatever your O-ring needs might be, from great value general purpose O-rings, to O-rings with custom compounds that meet your most demanding requirements. We offer O-rings that meet virtually every military and industrial specification in both standard and non-standard sizes: check out our online selection O-ring filter to get a taste of what we can achieve together with you.

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Datwyler’s Parco brand is a leading supplier of O-rings and custom rubber seals that are FDA compliant (meeting the standard CFR Title 21 Part 177.2600 Rubber Articles Intended for Repeated Use.) Explore further to access an extensive list of FDA conforming compounds and sample test results.