PTFE Envelope Gaskets

Polytetrafluoroethylene (PTFE) envelope gaskets provide excellent sealing in corrosive environments.  PTFE envelope gaskets are available in standard sizes and configurations, as well as custom sizes upon request. PTFE envelope gaskets are available slit (v-type) or milled (square cut) with a variety of materials available for fillers.  The Sealing Solution Pros at M&P can manufacture the envelope gaskets required for your unique situation.  Contact us today for a detailed quote.

M&P Sealing Solutions Pro’s are able to make ring full face, V Type, CRT, U-Cut, and square-cut, slit, channel, formed, and other specially shaped envelope gaskets using PTFE, a unique fluoropolymer with excellent chemical resistance.

Uses for PTFE Envelope Gaskets:

  • General Purpose Glass Lined Equipment
  • Pharmaceutical High Purity
  • Piping Service
  • Food and Chemical Industries
  • Sizes: 1/2 to 96

Fillers:

  • Non-asbestos Elastomers
  • Corrugated Metals (with and without tabs)
  • Flexible
  • Graphite
  • Graphonic

Standard Envelope Gasket

Style CRT is our normal service style envelope gasket that is the standard for glass lined vessels and piping.  PTFE slit envelope with two non-asbestos fillers and a 316 SS corrugated metal ring as fillers.  Sizes 1-96 for special applications or shapes and sizes.  Please contact us for more information about these quality enveloped gaskets.

Key Properties

  • Excellent Chemical Resistance
  • Excellent Dielectric Properties
  • Highly Reflective to ultraviolet light, with Reflectivity greater than 85% in the spectral range of 240-300 nanometers.
  • Resistance to Weathering (UV Resistant)
  • Self-Lubricating
  • Very Low Coefficient of Friction
  • Wide Operating Temperature Range from Cryogenic to 500F

Limitations

  • High Loads
  • Subject to Creep, Cold Flow
  • High Thermal Expansion
  • Tight Tolerance Applications

Applications

  • Bushings and Bearings
  • Chemical Processing Components
  • Electrical Components
  • Gaskets
  • Pump and Valve Components
  • Seals
  • Valve Seats
  • Wear Pads
  • Germicidal UV, UVC, Far UVC Disinfecting System Reflective Components

Available Sizes

PTFE is available in a wide range of shapes as follows

  • Molded Sheet
    • Thickness .063″ to 8.000″
    • W x L Standard 48.000″ x 48.000″
    • Skived Sheet and Skived Tape
  • Rod
    • Diameters .093″ to 62.000″
  • Film
    • Thickness .001″ to .030″