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ECAP PTFE ENCAPSULATED O-RINGS
FEP/PFA seamless encapsulated silicone & Viton® O-rings.
STRUCTURE
AN ECAP PTFE encapsulated O-ring, is an O-ring consisting of a seamless and uniform FEP/PFA encapsulation which completely encloses a core material of either silicone (ZZR-765B) or Viton® (A500) elastomers. The dimensions of the ECAP PTFE encapsulated O-ring are characterized by the inside diameter and the cross section (I.D. x C.S.).
FUNCTION
The ECAP PTFE encapsulated O-ring behaves like a highly viscous fluid, any pressure exerted on the seal is transmitted in all directions with virtually no decrease in strength.
Low vapour permeability and minimal water absorption.
PROPERTIES
1) High chemical resistance due to the FEP/PFA encapsulation.
2) Operational temperature range of -196C/-320F to +205C/400F.
3) Anti-adhesive properties / non-stick surface.
4) Sterilizable-F.D.A. approved. See General Specifications.
5) Low vapour permeability and minimal water absorption.
6) Low compression set.
REMARKS
ECAP PTFE encapsulated O-rings are resistant to practically all chemicals due to the FEP/PFA encapsulation. The FEP/PFA encapsulation is fully-integrated and has no weak points such as obvious seams or overlaps.
98% of all technical applications are within the operating temperature range of the ECAP PTFE encapsulated O-ring.
The FEP/PFA encapsulation of the ECAP PTFE encapsulated O-ring has a very low coefficient of friction.
The elastomer core of the ECAP PTFE encapsulated O-ring ensures continuous intensive contact with the sealing surfaces. Combining the best qualities of FEP/PFA resins and silicone or Viton® elastomers the ECAP PTFE encapsulated O-ring is an inexpensive, efficient and economical solution to many critical sealing problems.
ECAP-O-Rings
PTFE Encapsulated Silicon and Viton O-Rings
Overview
ECAP-O-Rings are o-rings consisting of seamless and uniform PTFE FEP/PFA encapsulation which completely encloses a core material of either silicone (ZZR-765B) or Viton (A500) elastomers. The ECAP-O-ring behaves like a highly viscous fluid, any pressure exerted on the seal is transmitted in all directions with virtually no decrease in strength.
Features

High Chemical Resistance: chemical attack and swelling are the primary reasons why O-rings faill. ECAP-O-Rings are virtually chemically inert, and do not swell.

Outperforms solid PTFE O-Rings: ECAP-O-rings match the chemical and temperature resistance of solid PTFE O-Rings, ECAP-O-Rings possess of elasticity and recovery properties which are crucial in many sealing applications.

Economical: ECAP-O-Rings economically and effectively replace Kalrez and other exotic O- Ring compounds. ECAP-O-Rings will decrease downtime and therefore increase profitability wherever corrosive fluids and gases cause premature seal failure.

Wide Temperature Range: ECAP-O-Rings withstand breakdown caused by industrial solvents and corrosive materials at elevated temperatures from -60° C/-75° F to +205° C/400° F. (see technical bulletin)

Non Stick Surface: provides easy cleanup of viscous materials.

Low Coefficient of friction: self lubricating surface

Sanitary: eliminates contamination of fluids by elastomers. Sterilizable and FDA - approved.

Unlimited sizes: available in standard and metric sizes from .059" cross-section x ?" I.D. to virtually unlimited larger sizes.

Low Compression Set: ECAP-O-Rings consist of either a solid silicone or fluorocarbon core encapsulated in PTFE* FEP/PFA resin (with .010 to .045 wall depending on the cross-section) which meets or exceeds the requirements of L-Pl389A and ASTM-D-2166. (see technical bulletin)

Groove Construction recommendations for ECAP O-Rings (PTFE) encapsulated O-Rings
Cross Section Nominal Squeeze Min. ID Range Max. ID Range Groove Width
.070 (1,78 mm) .020 (0,51 mm) .250 (6,35 mm) 1.50 (38,10 mm) .100 (2,54 mm)
.103 (2,62 mm) .025 (0,64 mm) .500 (12,70 mm) 2.50 (63,50 mm) .130 (3,30 mm)
.139 (3,53 mm) .030 (0,76 mm) 1.00 (25,40 mm) 5.00 (127,00 mm) .175 (4,44 mm)
.210 (5,33 mm) .045 (1,14 mm) 2.10 (53,34 mm) Any .275 (6,98 mm)
.275 (7,00 mm) .050 (1,27 mm) 3.00 (76,20 mm) Any .350 (8,89 mm)

NOTE: The above applies to minimum width and depth recommendations for machined grooves in metal. Recommended surface finish of 32 microinches or more.

GENERAL SPECIFICATIONS

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

2. Core material: Silicone ZZR 765B or Dupont Viton A500 elastomers.

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

4. Coefficient of friction: .1 to .2.

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 FEP encapsulation of the ECAP-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.