Expanded PTFE Sheeting
Specifications

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EPTFE (Expanded PTFE) is a Universal sheet gasket material for most services. Seals rough and irregular surfaces.  Made from biaxial oriented expanded PTFE sheeting that is laminated to the required thickness.  Seals of up to 3000+psi can be achieved depending on the flange type & design and type of media being sealed.  Chemically resistant over the Q-14 pH range.  Specific gravity: 4 to 6.  Suitable for temperatures to 600F.

Expanded PTFE Sheeting
CONSTRUCTION
Our EPTFE gasket sheet is manufactured by expanding 100% virgin PTFE using a proprietary process that produces a uniform and highly fibrillated microstructure with equal tensile strength in all directions. The resulting product exhibits characteristics significantly different than conventional PTFE sheet. EPTFE  is much softer and more flexible than regular PTFE sheet and thus conforms easily to irregular and rough surfaces. In addition, the material is easier to compress and minimizes creep and cold flow.

APPLICATION / SERVICE
Our EPTFE  is an all purpose gasket sheet that can replace all other types of PTFE sheet. It will seal all aggressive chemicals over the entire 0-14 pH range except for molten alkali metals and elemental fluorine. Made from 100% virgin PTFE, Our EPTFE  not only resists chemical attack, but it will not contaminate or discolor end products. These industries currently use expanded PTFE sheet:
  • Distilleries
     
    •
  • Petrochemical
    		•
  • Food and Beverage

    •  
  • Pharmaceutical
    		•
  • General Chemical
    •
  • Power generation
    		•
  • Iron and Steel Manufacturing
    •
  • Pulp and paper
    		•
  • Marine
    •


    SERVICE LIMITS
    Temperature Limits:
      Minimum
    		-450°F (-268°C)
      Maximum
    		600°F (315°C)
    pH: 0-14 (except molten alkali metals and elemental fluorine)
    ASTM Line Call Out ASTM F 104
    Color White
    Available Sheet Sizes
      Thicknesses:
    		1/32”, 1/16”, 3/32”, 1/8”, 3/16”, 1/4”
      Sheet Size
    		60” x 60”
    TYPICAL PHYSICAL PROPERTIES EPTFE 
    ASTM
    TEST METHOD    		 PHYSICAL PROPERTIES VALUES
    F 37 Sealability
      ASTM Fuel A (isoctane):
      Gasket load, 500 psi (3.5 N/mm2)
      Internal Pressure, 9.8 psi (.7 bar)
      Nitrogen:
      Gasket Load, 500 psi (20.7N/mm2)



    0.0 ml/hr


    .16 ml/hr
    F 36 Compressibility 68%
    F 36 Recovery 12%
    F 38 Creep Relaxation 32% at 212°F
    16% at 73°F
    F 495 Ignition Loss 30%
    F 146 Weight Incease After
    Five Hour Immersion
      ASTM Oil #1 @ +300°F (+150°C)
      ASTM Fuel IRM 903 @ + 300°F (+150°C)
      ASTM Fuel A @ + 70-85°F (+21-29°C)
      ASTM Fuel B @ + 70-85°F (+21-29°C)
    		-
    F 146 Thickness Incease After
    Five Hour Immersion
      ASTM Oil #1 @ +300°F (+150°C)
      ASTM Fuel IRM 903 @ + 300°F (+150°C)
      ASTM Fuel A @ + 70-85°F (+21-29°C)
      ASTM Fuel B @ + 70-85°F (+21-29°C)
    		-
    F 152 Tensile Strength Across Grain 1/16" thick - 1600 psi
    (11 N/mm2)
    1/16" thick - 1600 psi
    (11 N/mm2)
    DIN 3535
    Part 4    		 Gas Permeability
      Nitrogen:
      Internal pressure: 580 psi (40 bar)
      Gasket Load: 4640 psi (32 N/mm2)
    		-
    - Density: 53 lb/ft3
    (.85 gm/cc)
    Properties and application parameters shown are typical and are presented in good faith but no warranty is expressed or implied. This edition supersedes all previous issues and all data is subject to change without notice. 11/96

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