Call us : 406-227-0477

Teflon® Encapsulated O-Rings by M-Cor Inc:

M-Cor Inc. is the leading custom USA manufacturer of a  range of Teflon® Encapsulated O-Rings, CamLock Coupler Gaskets and custom extrusions designed for locking out corrosive fluids and gases in harsh sealing environments. We offer a complete line of encapsulated o-rings in Aerospace Standard,British standard, Japanese Industrial Standard and limitless custom sizes. Rely on our short delivery times and competitive pricing to enhance your ROI. Call us at 406.227.0477 for assistance or send your inquiries to: Contact Us

 

Lock Out Corrosive Fluids and Gases: Teflon Encapsulated Silicone and Viton® O-Rings

 M-Cor’s Teflon® encapsulated o-rings consist of a core material of either silicone,Viton or EPDM elastomers completely enclosed by a  uniform thickness Teflon sheath. Due to the elastomer core material the encapsulated o-rings resist compression set and combined with a Teflon Encapsulation of uniform thickness, M-Cor’s Teflon Encapsulated O-Rings provide chemical resistance against various acids, bases and solvents.  Properties include low coeffient of friction, non stick surfaces, low out gassing, < 0.01 water absorption, A rated dielectric properties, durabilty and have a wide operating temperature range. These high performance o-rings are utilized where ever demanding applications are required to lock out corrosive fluids and gases. See Physical Properties page.

 

Overview: Teflon® Encapsulated O-Rings

Chemical Compatibility of Encapsulated O-rings:

Resistant to: Most industrial solvents, acids, and corrosive materials. See our Chemical resistance Blog.

Applications: Ideal for environments where exposure to harsh chemicals is a concern, like chemical processing , pharmaceutical manufacturing, filtration(cartridge filters), semiconductor, medical devices and many more.

Cross-Section Sizes:

In-stock sizes range from .060 to .591 inches,  All AS568 sizes starting at  AS009, all preferred metric sizes and JIS with options for larger custom sizes upon request.

IN STOCK CROSS SECTION SIZES:

.060|.070|.079|.094|.103|.118|.139|.157|.177|.187|.197

.210|.217|.225|.236|.250|.275|.295|.312|.331| .350| .375

.395|.437|.472|.500|.551|.591

We can extrude custom geometries such as square,rectangular, d shapes upon request. Minimums apply.

GENERAL SPECIFICATIONS:

1. Encapsulation material:  FEP Teflon® Encapsulated O-rings:  Tetraflouroethylene-Hexafluoropropylene. Teflon® PFA  Encapsulated O-rings:   Tetraflouroethylene-Perfluoro (Propyl Vinyl Ether).

2. Core material:  Silicone, Viton® ,EPDM,Silicone Tubing,Viton® Tubing

    • 3. Continuous service temperature:
      • A. FEP Teflon Encapsulated O-rings with Silicone Core: 400F/204C. to -10F/-23C Designation FEPSIL
      • B. PFA Teflon Encapsulated O-rings with Silicone Core: 500F/260C to -10F/-23C Designation: PFASIL
      • C. FEP Teflon encapsulated O-rings with Viton® Core: 300F/149C to -10F/-23C Designation: FEPVIT
      • D. FEP Teflon Encapsulated O-rings with *HT Viton® Core: 400F/204C to -10F/-23C *Hot Bonded Designation: FEPHTVIT
      • E. PFA Teflon Encapsulated O-rings with *HT Viton® Core: 400F/204C to -10F/-23C *Hot Bonded Designation: PFAHTVIT

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

5. Water absorption: <0.01.

6. Average total shore A hardness:

      • 85-90 shore A for solid silicone core.
      • 90-95 shore A for solid viton core.
      • 75-80 shore A for hollow silicone core.
      • Explanation: Shore A hardness measures the resistance of the rubber core to compression set or indentation. Higher values indicate a harder material, which is crucial in applications requiring higher pressure resistance.

7. FDA Compliance: The clear TEFLON® FEP encapsulation of the M-Cor’s Teflon® encapsulated o-ring complies with part 177 of Title 21 of the Food and Drug  Administration’s regulations for safe use as articles or components of  articles for producing, manufacturing, processing, preparing, treating,  packing, transporting or holding food in accordance with regulation  177.1550.00 FDA-Grade, USP Class VI, and 3-A Sanitary Standards

Application Use:

See how to specify

Medical Field:

Due to their chemical resistance, non-contaminating nature, and ability to be sterilized (autoclavable),  M-Cor’s Teflon® Encapsulated O-rings are ideal for medical devices and equipment that require quality hygiene standards.

Chemical Processing Field:

The chemical resistance and temperature range make M-Cor’s Encapsulated O-Rings suitable for reactors, pipelines, and storage containers in the chemical industry, where exposure to corrosive fluids and gases are present.

Semiconductor Field:

FEP Encapsulated O-rings are the preferred choice, due to their low outgassing, high purity, and temperature resistance.  They may be utilized with substantial cost savings in the manufacturing of semiconductors, where even minute contamination can lead to significant product defects.

Conclusion

M-Cor Inc’s Teflon® Encapsulated O-Rings offer solutions across a range of industries, where high chemical resistance, wide temperature range, and durable mechanical properties are essential. The range of available sizes, chemical resistance, temperature ranges makes them adaptable to a wide variety of engineering applications, from sterilizable medical equipment to harsh chemical processing environments, precision semiconductor manufacturing and use in sterilizable medical devices. Their ability to withstand extreme conditions while maintaining integrity and performance is a key factor in their utilization.

While laboratory testing of M-Cor’s ENCAP-O-SEAL o-rings is  a valuable screening technique, the final selection for use in applications  must be based on functional evaluations or experience under actual  end use conditions. This has become industry practice dictated by  the many complex aspects of performance in severe conditions

 

Compliances:

   
Specifications Met ASTM D2000, FDA Compliant 21 CFR 177.1550, FDA Compliant 21 CFR 177.2600, SAE AS568, SAE J200
Temperature Range -75 to 400 F FEP | -75 to 500 F PFA
Color Clear( FEP,PFA) with Red (Silicone) Inner Ring or Black(Viton,EPDM) Inner Ring
RoHS RoHS 3 (2015/863/EU) Compliant
REACH REACH (EC 1907/2006) (01/17/2023, 233 SVHC) Compliant
DFARS Specialty Metals COTS-Exempt
Country of Origin United States
USMCA Qualifying No
Schedule B 392690.4500
ECCN EAR99