FEP Encapsulated Silicone O Ring

FEP type PTFE fluoropolymers (performance plastics) offer excellent chemical and temperature resistance, but lack the resiliency of elastomers (rubber) required to maintain a quality seal.

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FEP type PTFE fluoropolymers (performance plastics) offer excellent chemical and temperature resistance, but lack the resiliency of elastomers (rubber) required to maintain a quality seal. Encapsulated and spring energized seals combine the best sealing features of plastics, elastomers and steel springs to increase chemical and temperature performance compared to most solid elastomers. The main offsetting limitation is PTFE's stiffness that can require custom gland design to maximize sealing by using the right amount of compression force to maintain a seal without over compressing which can shorten seal life. PFA type PTFE is also available for additional upper temperature resistance (up to plus 575 degree F short exposure) but not widely used due to reduced sealing performance.

Product Details

Encapsulated o-rings and spring energized seals offer many performance benefits in demanding environments. FEP and PFA fluoropolymer shell delivers excellent chemical resistance with the energizing resiliency of a rubber elastomer core combines the best of both materials for o-rings with extreme chemical and temperature resistance.

Please reference our encapsulated o-ring material comparison chart and sizing capabilities guide. Encapsulated o-rings are more stiff than solid rubber so can require special groove design considerations for optimal performance. Contact our responsive experts for engineering support.

Our factory has many commonly used sizes of encapsulated o-rings in-stock, and custom sizes are made within a few weeks without tooling fees.

FEP Encapsulated Silicone O-Rings

O-Ring with a FEP or PFA outer layer encapsulating a silicone core. The 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, improved chemical resistance.

FEP Encapsulated O-Rings (Fluorinated Ethylene Propylene):

Outstanding chemical and corrosion resistance

Low coefficient of friction

Resilience with choice of elastomeric cores

Low compression set

Temperature range: -75 degree F to 400 degree F (-60 degree to 205 degree )

Unlimited sizes (No tooling charges)

Solid hollow silicone

FDA compliant materials available

USP Class VI approved materials available

FEP Tubing Features	PFA Tubing Features
Wide range of chemical resistance High corrosion resistance Low compression set Low coefficient of friction Temp range of -60 degree to 205 degree (-76 degree F to 400 degree F) (500 degree F short exposure) FDA, USP CLASS VI, Sanitary 3A Compliant	All benefits of FEP Increased temp range of -60 degree to plus 260 degree (-76 degree F to 500 degree F) (575 degree F short exposure) Higher mechanical strength Increased stress and crack resistance Potential sealing issues due to stiffness

We are a professional manufacturer of Silicone O-Ring. For more information on O-rings and other seals, please call or contact us immediately.

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