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Encapsulated O Ring


Encapsulated O Ring with PTFE FEP or PFA resins:


PTFE Encapsulated FKM and Silicone O-Rings

Encapsulated o-rings are o-rings consisting of a seamless and uniform PTFE FEP/PFA encapsulation/jacket which completely encloses a core material of either silicone (FPLTRD70-10) or FKM (Type A) elastomers. The encapsulated O-ring  behaves like a highly viscous fluid, any pressure exerted on the seal is transmitted practically undiminished in all directions.

PTFE Encapsulated o ring

High Chemical Resistance: Chemical attack and swelling are the primary causes of O-Ring failure. encapsulated o-rings are virtually chemically inert.
Outperforms solid PTFE O-Rings: encapsulated o-rings match the  chemical and temperature resistance of solid PTFE O-Rings,   encapsulated o-rings possess properties of elasticity and recovery which are crucial  in many sealing applications.
Economical: encapsulated o-rings economically and effectively  replace Kalrez and other exotic O-Ring compounds. encapsulated o-rings will decrease downtime and hence increase profitability wherever corrosive fluids and gases cause premature seal failure.
Wide Temperature Range: encapsulated o-rings withstand breakdown caused by industrial solvents and corrosive materials at elevated temperatures from -60° C/-75° F to +205° C/400° F.
Non Stick Surface: Provides easy cleanup of viscous materials.
Low Coefficient of Friction: .2 on metal. Self lubricating surface.
Sanitary: Eliminates contamination of fluids by elastomers.  Sterilizable and autoclavable. FDA compliant, USP Class VI compliant, NSF compliance available for specific applications.
Unlimited Sizes: Available in standard and metric sizes to virtually unlimited larger sizes.
Low Compression Set: encapsulated o-rings consist of either a  solid silicone or FKM core encapsulated in PTFE FEP/PFA  resin (with .010 to .045 wall depending cross section) which meets or exceeds requirements of L-P389A and ASTM-D-2166.


Encapsulation material:PTFE FEP: Tetraflouroethylene-Hexafluoropropylene.PTFE PFA: Tetraflouroethylene-Perfluoro (Propyl Vinyl Ether).

Core material: Silicone FPLTRD70-10 peroxide cured or FKM Type A elastomers.

Continuous service temperature: FEP 400F /204C., PFA 500F/260C.

Coefficient of friction: .1 to .2 on metal.

Water absorption: <0.01.

Average total shore A hardness:
85-90 shore A for solid silicone core.
90-95 shore A for solid FKM core.


If you require further information or enquire, please contact us. Simply call us on: +8620 36013580, or e-mail us:

DKI Rubber & Plastic Ltd
No9, Helong Road, Jiahe, BaiYun District, Guangzhou, 510440 CHINA
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