Dunham Rubber & Belting Corporation
Dunham Rubber & Belting Corporation
682 Commerce Parkway West Drive, Greenwood, IN 46143
Toll Free: 800.876.5340
Tel: 317.888.3002
Fax: 317.888.2335
Email: mail@dunhamrubber.com
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  • Made of chemically inert clear FEP
  • Manufactured from FDA-sanctioned ingredients
  • Heat set into a retractable coil; excellent recoil memory
  • Offers all the chemical and electrical insulation properties of standard FEP fluoropolymer tubing
  • Allows flexibility to otherwise semi-rigid fluoropolymer tubing
  • Made to order or stocked sizes available
Notes

Almost totally inert. COILTEF can be used with all industrial solvents, chemicals, and corrosive materials even at elevated temperatures. It does, however, react with fluorine, molten sodium hydroxide, and molten alkali metals.

Fluoropolymer's non-stick property allows transport of viscous, sticky material without line clogging. It also offers outstanding aging resistance.

COILTEF is manufactured through a fabrication process which heat sets the coils. The coils should remain stable up to 200ºF. At higher temperatures the coils will begin to relax and lose their set. If the application involves elevated temperatures, in-house testing is recommended.

COILTEF may be steam or chemically sterilized in-line with any industrial cleaner, solvent, or sterilizing method. Care should be taken with steam sterilization to prevent coil relaxation. Testing is recommended.

COILTEF can be manufactured from 0.085" to 1/2" tubing I.D. The coil diameter can be produced from 3/4" O.D. to 4" O.D.

PFA-formulated COILTEF is available by special order.
Unit of Measure

Specifications

I.D. (Dim. A)

 N/A 1/4 in

O.D. (Dim. B)

 N/A 3/8 in
Coil O.D. (Dim. D)1 N/A 2-3/8 in
Available Lengths2 N/A 12 in24 in48 in72 in

Wall Thickness

 N/A 1/16 in

Tail Length

 N/A 6 in

Notes

 N/A The retracted length is approximately 1/4 of the maximum expanded length excluding tails.
Wall thickness for all standard sizes is 1/16. Tail length (item C) is 6" for all listed sizes.

Physical Properties

Hardness, Shore D

 N/A 55

Tensile Strength

 N/A 3500 psi

Elongation at Break

 N/A 300 %
Brittle Temperature3 N/A <-400 ºF
Max. Operating Temp.4 N/A 400 ºF

Notes

 N/A Values listed are typical for the material used in manufacture, except where noted, and are meant only as a guide to aid in design. Field testing should be performed to find the actual values for your application.
  • 1 These dimensions are nominal.
  • 2 These dimensions are nominal.
  • 3 Temperatures are for standard extruded (non-coiled) tubing.
  • 4 Temperatures are for standard extruded (non-coiled) tubing.