SWKS Seal, with over 10 years experience, is one of the leading fep encapsulated o rings manufacturers and suppliers in China. And we also offer the customized service catering to your special requirement. Please be free to buy the rubber products with competitive price from us.
FEP Encapsulated O Rings
O-Ring with a FEP or PFA (PTFE) outer layer encapsulating a Silicone core. The PTFE shell offers excellent chemical and temperature resistance while the Silicone core provides the resiliency needed to provide effective sealing. Readily available in common USA and metric cross-sections and nearly unlimited diameters. FEP encapsulated Solid Silicone with improved chemical resistance up to 205℃. PFA encapsulated Solid Silicone up to 260℃.
Temperature:
FEP Encapsulated O-rings: -60℃ to 205℃ (260℃ short term)
PFA Encapsulated O-rings: -60℃ to 260℃ (300℃ short term)
PTFE coated encapsulated O-rings are designed to combine the sealing properties of the rubber O-ring with the chemical resistance of PTFE. They are generally manufactured from FKM or silicone rubber and are coated in a thin molded layer of PTFE FEP or PFA. This provides a unique seal popular for high friction and aggressive chemical applications. FEP encapsulated O-rings are our most common and are resistant to solvents and chemicals (except for alkaline metals, fluorine and some halogenated compounds at high temperatures). They have a low coefficient of friction and a very low permeability to gases making them suitable for harsh environments. PTFE coated encapsulated o-rings also have a good elastomeric memory.We can also supply rigid PTFE o-rings which have a high compression set.
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