STRESS SAVER® GYLON® Style 3504 Gasket Seals

100% GYLON® PTFE with aluminosilicate microspheres

GYLON® STRESS SAVER® Style 3504 combines the proven sealing advantages of molded, raised ribs with the performance characteristics of the industry recognized GYLON® 3504 PTFE gasketing material. The combination of these two time-tested configurations make Style 3504 GYLON® STRESS SAVER® the ultimate sealing solution.

  • Versatility – Suitable for both metallic and non-metallic piping with either flat or raised face flanges
  • Chemical resistance – GYLON® 3504 is ideal for a wide range of caustics and acids, helping to simplify the selection process
  • Limited Creep and Cold-Flow – Greatly reduces the leakage after installation and system cycling
  • Superior Physical Properties – Higher temperature and pressure capabilities as compared to rubber gaskets
  • Homogeneous Construction – Single piece design helps avoid permeation, delamination, fold-over of PTFE envelopes and potential splitting when installed against raised face flanges
  • High purity – FDA, USP Class VI, and NSF-61* 

*Style 3505 GYLON® Stress Saver® is able to meet the stringent requirements of NSF-61 for potable water applications.

  • Composition
    100% GYLON® PTFE with aluminosilicate microspheres
  • Color Blue
  • Temperature
    -450° F to 500° F / -268° C to 260°C
  • Pressure
    PSIG 800 PSIG 55 Bar
  • PxT (max)
    250,000 (psig x °F) / 8,600 (bar x °C)
  • Media
    All solvents, most caustics and acids, hydrocarbons, refrigerants, cryogenics and potable water
  • Approved to NSF-61 for potable water applications.
  • Bolt Circle Diameter (Inch)3.875
    Bolt Circle Diameter (mm)98.43
    Bolt Hole Diameter (Inch)0.625
    Bolt Hole Diameter (mm)15.88
    Bolt Hole Quantity4
    CompliancesFDA Compliant, REACH Compliant, RoHS Compliant, USP VI 87 Compliant, USP VI 88 Compliant, USP VI 661 Compliant, ADI/TSE Free
    CompositionPTFE with Aluminosilicate Microspheres
    Flange Standards/Pressure ClassASME B16.5 Class 150
    Gasket TypeFull Face
    Inside Diameter (Inch)1.890
    Inside Diameter (mm)48.01
    MaterialGYLON Style 3504
    Material AbbreviationPTFE
    Min Temperature (C)-268
    Min Temperature (F)-450
    Nominal Pipe Size (inch)1.500
    Nominal Pipe Size DN (mm)40.0
    Nominal Pipe Size Fraction (Inch)1 1/2
    Outside Diameter (inch)5.000
    Outside Diameter (mm)127.00
    Pipe Standard and ClassASME B16.5 Class 150
    Pressure Class150
    Pressure Max (bar)55
    Pressure Max (psi)800
    Primary Dimensional Unit of MeasureImperial
    Primary Nominal Thickness1/8 in
    Shipping Weight0.126 lbs
    Style/ModelStyle 3504
    Temperature Range (C)-268°C to 260°C
    Temperature Range (F)-450°F to 500°F
    Thickness (inch)0.125
    Thickness (mm)3.18
    UPC Code191074151580


  • Chemical Processing
  • Electronics, semiconductor
  • Food
  • Pharmaceutical
  • Pulp and Paper
  • Potable/Drinking water*

Flange Types

  • PVC
  • FRP
  • PVDF
  • CPVC
  • Polypropylene
  • Cast and ductile iron

*Specify Style 3505 GYLON® Stress Saver®

Meets ABS (American Bureau of Shipping), FDA (Food and Drug Administration), and USP (US Pharmacopeia) specifications.

STRESS SAVER® GYLON® Style 3504 Gasket Seals

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STRESS SAVER® GYLON® Style 3504 Gasket Seals

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