Optimize your total cost of ownership with higher safety and better performance. Our ORIGRAF® graphite pressure seals are designed to excel in extreme thermal and pressure cycles.

About Technetics Group ORIGRAF® Graphite Pressure Seals

Unlike other seals, the graphite flexibility of ORIGRAF® graphite pressure seals can avoid the influence of surface defects, even in offloading conditions. Unlike flexible graphite cut gaskets, the compression of our ORIGRAF® die-formed seal is limited by a mechanical stop, such as a groove or inner or outer ring. The design prevents excessive seating stress on the seal during transients when assemblies are subject to extreme pressure or temperature.

Product Features

  • Excellent elastic recovery, capable of reaching 40% compression recovery/spring back effect
  • Low creep and relaxation
  • Good resistance to radiation (ideal for nuclear applications) and chemicals
  • Adaptable to extreme thermal and pressure changes
  • Excellent resis­tance to radial motion
  • Metal to metal contact
  • Not vulnerable to asymmetric tightening or torqueing bolts of assembly
  • Does not bond to the contact surfaces, so can be easily removed

Industries and Applications

  • Nuclear
  • Chemical
  • Petrochemical
  • Aerospace
  • Life sciences
  • Oil & gas
  • For use in a wide variety of applications including:
    • Alkylation units
    • Steam equipment
    • Heat exchangers/heaters
    • Piping connection flanges
    • Corrosive circuits
    • Critical flange applications
    • Boilers manways
    • Applications with fire safe requirements

Properties and Technical Information

  • Extreme Temperature and Pressure Performance
    • Pressure: up to 400 bar (5,802 PSI)
    • Temperature: from -321°F to 4532°F (-196°C to 2500°C)
  • Standard Sizes
    DN (mm) 15 to 600 – NPS (in) ½” to 24″ and CLASS (lbs.) 150 to 2500 – PN (bar) 20 to 420 *.
  • Certifications.
    The ORIGRAF® seal is PMUC certified by EDF (No. PMUC 17-0174) and BAM.
  • ORIGRAF® ON 002 Gaskets
    These gaskets have been designed for adaption to flat surfaced flanges (type FF) or raised flanges (type RF) and single insertion (type SE), following flange standards NF-EN 1092-1 and NF-EN 1759-1 (ASME/ANSI B16-5).

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