Product DescriptionDescriptionFEP is a thermoplastic material with
properties similar to PTFE. O-rings which are seamlessly coated
with FEP have an elastic core made from FPM or VMQ and are used if
very high thermal or chemical loads are present. The high chemical
resistance of the coating protects the core against damage by the
potentially aggressive medium.FEP coated O-rings are used - similar
to PTFE-rings - where the chemical resistance of the normal
elastomer O-ring is no longer sufficient, but where a certain
elasticity is needed. The elasticity is ensured by the inner ring
and the chemical resistance is achieved by the seamless FEP
coating.ApplicationsFEP coated O-rings are perfectly suited for the
chemical and petrochemical sector, medical technology, food sector,
water and waste water technology and similar industrial
applications. A typical application for FEP coated O-rings is the
sealing of valve stems and as a secondary sealing element for slow
switching and rotary movements.PropertiesVery good chemical
resistance against most liquids and chemicalsTemperature range from
approx. -60 °C to 200 °C [depending on inner ring material]No
contamination of food, pharmaceutical or medical
productsPhysiologically harmless, can be sterilisedSufficient
elastic behaviourFEP O-rings can be replaced with standard O-ring
seals without limitationNo changes to the groove dimensions are
necessaryThe O-rings are less flexible than elastomer O-rings due
to the FEP coating. They can only be stretched minimally and have a
lower elasticity or a higher permanent deformationFEP-encapsulated
O-Rings (Fluorinated Ethylene Propylene):Outstanding chemical and
corrosion resistanceLow coefficient of frictionResilience with
choice of elastomeric coresLow compression setTemperature range:
-75°F to 400°F (-60°C to 205°C)Unlimited sizes (No tooling
charges)Solid & hollow silicone, FKM coresFood Grade - non
toxic materials availablePFA-encapsulated O-Rings
(Perfluoroalkoxy). Same as FEP above but with these added
benefits:High temperature applications to 500°F (260°C)Higher
mechanical strengthBetter flex-lifeLow vapor permeationExcellent
stress and crack resistanceLonger wearabilitySolid silicone &
FKM core Rubber O Rings Information Material
Hardness (Shore A)
TemperatureSizeStandardAvailableNBR (Nitrile, Buna)FKM (FPM)EPDMVMQ
(Silicone)HNBRFFKM60-9070-9060-9010-7060-9070-90-40ºC - 110ºC-20ºC
- 220ºC-45ºC - 150ºC-55ºC - 204ºC-48ºC - 180ºC-18ºC - 326ºCAS-568
(USA)JIS-B2401 (Japan)DIN-3771 (Germany)BS-1516 (UK)ISO3601
(International)R (France)
ID≤2000mmC/S≤40mmResistanceColorCertificateApplicationEngine
OilHydraulic FluidChemicalOzoneSteam & Hot WaterLow TemperatureHigh
TemperatureBlackBrownGreenRedWhiteBlueColor as request
ISO9001RoHSREACHFood Grade CertSGSAutomotive IndustryConstruction
MachineryMachine Tool EquipmentWater TreatmentChemical
ProcessingHydraulic PneumaticIndustrial Manufacturing Company
ProfileFAQ1. Q: What is your main product range?A: SWKS is
professional in designing, developing and manufacturing rubber
products. For example, o rings, oil seals, piston and rod seals,
rubber shock absorbers and custom rubber products.2. Q: What kinds
of rubber materials are available?A: NBR, FKM, VMQ, EPDM, CR, SR,
PU... other rubber compounds can be with your request.3. Q: What
shall be provided before a offer?A: The materials and dimensions
are needed before a offer. If the product is nonstandard, the
drawing or sample shall beprovided.4. Q: What's your payment terms
and delivery date?A: T/T, L/C, Western Union, Paypal,etc. Normally,
delivery date is 7-25days according to the order.5. Q: Which
shipping method will be used for a delivery?A: DHL, FedEx, TNT,
UPS, EMS ... By seal or by air are also available.6. Q: How to
packing the goods?A: All goods will be well packed into pp bags and
outer cartons. Special packing can be available with customers'
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