Fitok flanges are designed in accordance with ISO 3669.

Product Features:

  • Flanges are designed in accordance with ISO 3669.
  • CF flanges are available in rotatable and nonrotatable models, with either through holes or tapped holes.
  • The CF flange joint consists of an OFHC (oxygen-free, high-conductivity) copper gasket compressed between two "sexless" flanges secured with stainless steel fasteners.
  • The seal results from the deformation of the copper gasket caused by its compression between the knife edges of the flanges. This compression causes the copper material to flow into and fill any surface discontinuities.
  • The tubular sections of CF products are supplied with a bead-blasted finish.
  • Systems with copper gaskets may be baked to 932°F (500°C). Fluorocarbon FKM gaskets may be baked to 399°F (204°C); however, sustained baking above 399°F (150°C) may result in deterioration of the gasket.
  • Vacuum Range: Copper: ≧10 Torr; Fluorocarbon FKM: ≧10 Torr
  • Operational Temperature Range: Copper: -325 to 842°F (-200 to 450°C); Fluorocarbon FKM: -4 to 302°F (-20 to 150°C)
  • Standard materials are in stainless steel 304, 304L and 316L or Aluminum.


Typical applications for CF vacuum products include:

  • Analytical instrumentation, such as electron microscopes, mass spectrometers, and Auger electron spectrometers
  • Materials creation or processing
  • High energy physics