Encapsulated O-Rings with Teflon® FEP or PFA resins:

  Features:

• 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 from  .059" cross section x ½" I.D. to virtually unlimited larger sizes.
   
• Low Compression Set: encapsulated o-rings consist of either a  solid silicone or Viton® core encapsulated in Teflon®* FEP/PFA  resin (with .010 to .045 wall depending cross section) which meets or exceeds requirements of L-P389A and ASTM-D-2166.
   

  GROOVE CONSTRUCTION  RECOMMENDATIONS FOR ENCAP-O-SEAL TEFLON® ENCAPSULATED O-RINGS CROSS SECTION NOMINAL SQUEEZE MIN. ID RANGE MAX. ID RANGE GROOVE WIDTH .070 .103 .139 .210 .275 .020 .025 .030 .045 .050 .250 .500 1.00 2.10 3.00 1.50 2.50 5.00 ANY ANY .100 .130 .175 .275 .350 NOTE: The above applies to minimum width and depth recommendations for machined grooves in metal. Recommended surface finish of 32 microinches or  better.   GENERAL SPECIFICATIONS 1.Encapsulation material: Dupont Teflon® FEP: Tetraflouroethylene-Hexafluoropropylene. Dupont Teflon PFA: Tetraflouroethylene-Perfluoro (Propyl Vinyl Ether). 2. Core material: Silicone FPLTRD70-10 peroxide cured or Dupont Viton Type A elastomers. 3. Continuous service temperature: FEP 400F /204C., PFA 500F/260C. 4. Coefficient of friction: .1 to .2 on metal. 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. 7. FDA Compliance: The clear TEFLON® FEP encapsulation of the 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. While laboratory testing of encapsulated o-rings is a valuable screening technique, the final selection of 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.