FEP encapsulated O-rings comprise of an elastomer core which has been seamlessly
encapsulated in a jacket of Teflon® fluoropolymer. The core is
either Viton ®, Silicone or EPDM. The jacket is FEP or PFA.
FEP encapsulated O-rings are recommended when a standard O-ring has
inadequate chemical resistance for an application. They are also
recommended when a solid PTFE O-ring does not have the elasticity
for reliable, long term fluid sealing. They are often used where
chemical resistance and or hygiene is required.
Typical industries include:
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Encapsulated seals were primarily designed to solve the growing
problems of sealing corrosive fluids in industry. This development
provided designers and engineers with a seal that combined the
chemical resistance of Teflon® with the resilience of rubber.
A seamless Teflon® jacket surrounds the elastomer core providing
the chemical inertness, whilst the memory in the elastomer core
energises the seal.
Encapsulated seals are available with two types of Teflon® jacket –
FEP which is standard, and PFA for more demanding applications.
The energising core is available in Viton®, Silicone or EPDM.
Viton® is offered as the standard because of its superior
compression set. For low-temperature applications, or where lower
closure forces are required a Silicone core is specified.
The design variations available, together with combined performance
characteristics of both the jacket material and elastomer core ,
ensures that encapsulated seals will be an effective solution for
many troublesome applications.
PTFE FEP:-60/+205 ℃. can stand 260 ℃ in short time.
PTFE PFA:-60/+260℃.can stand 300℃ in short time.
Medium:air,fluid and solide medium
Compressibility Section 2%,Dynamic 6%-20%,Static 15%-30%
1.super chemical-resistance,can resistant nearly all the chemical
2.good corrosiveness resistance
3.wide temperature range.
6.good sealing effect,long service time
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