Garlock HT Style 9900

High Temperature Style 9900

Garlock Gylon HT 9900 Gylon High Temp 9900 Datasheet PDF

High Temperature Gasketing
Graphite Fibers with a Nitrile Binder


  • Heat and Oxidation Resistant

    • Graphite fiber gasketing withstands extreme temperatures and pressures, as well as many chemicals
    • Passed Garlock Fire tests, and is ABS Fire Safe Type Approved
  • Long-Lasting Seal

    • Unique manufacturing process minimizes cold flow and creep relaxation problems
  • Versatile

    • Ideal for standard ANSI flanged connectors, as well as turbine crossover piping connectors
    • Multiple applications in power generation, chemical processing, hydrocarbon processing, and other industries


  • Steam*
  • Water
  • Oils
  • Grease
  • heat transfer fluids+

+Contact Garlock Engineering with specific transfer fluid application.

*Minimum recommended assembly stress = 4,800psi. Preferred assembly stress = 6,000-10,000psi. Gasket thickness of 1/16" strongly preferred. Retorque the bolts/studs prior to pressurizing the assembly. For saturated steam above 150psig, consult Garlock Engineering.

Min. Temperature:-100°F
Max Temperature:1000°F
Continuous Max:650°F
Max Pressure:2000 (PSI)
Maximum PxT 1/16:700,000 (°F x PSIG)
Maximum PxT 1/8:350,000 (°F x PSIG)