Buna-N
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The most common o-ring material is Buna-N due to its solvent, oil and water resistance. It has a temperature range of -30◦ to 250◦ F.
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EPDM
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Ethylene-propylene-diene rubber (EPDM, also sometimes referred to as EPR) is a chemically resistant family of compounds. Colder uses high quality peroxide cured EPDMs that provide exceptional resistance to temperatures with a wide range of chemicals.
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FFKM (Chemraz®, Simriz®, Kalrez®)
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Broadest range of chemical resistance of any elastomeric material, combining the resilience and sealing force of an elastomer with chemical resistance approaching that of PTFE.
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FKM
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Well known for its outstanding resistance to heat, oxidation, weathering, and ozone. The temperature range is -15°to 400°F.
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Food-grade
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Commonly used when food, beverages or potable water is going through the coupling.
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PFA & FEP Encapsulated Seals
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Encapsulated seals combine the resiliency of the elastomer with the superior chemical resistance of the fluoropolymer to achieve a seal that is lower cost than a pure fluoroelastomer FFKM seal.
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Silicone
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Seals have good temperature resistance. The temperature range is -70°to 400°with special compounds that can reach 175°to 450°F. Silicone can also be supplied with Class VI requirements for life sciences applications.
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