Graphite Pressure Seals

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).