Garlock HT Style 9900

High Temperature Style 9900

Garlock HT 9900 Garlock 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)