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Atlas CFTI™ All-Metal UHV & XHV Sealing for Non-Magnetic Titanium Vacuum Chambers

The Atlas CFTI™, Time-tested reliability of the ConFlat® (CF) with body and knife-edge seal Titanium (TI). Weld the CFTI™ flange to Titanium vacuum chamber it becomes a completely Non-Magnetic.

Non-magnetic Titanium vacuum chambers will not interact with magnetic environments. Non-Magnetic vacuums are used for UHV synchrotron and particle physics and industrial applications, and XHV for quantum physics study. Such applications include non-magnetic beam tubes, wigglers, ungulator, free electron lasers (FEL), drift tubes, spectrometers.

Light/Low weight Atlas CFTI™ Flanges: For weight sensitive applications such as Aeronautical, Space or portable systems. Wight to volume ratios are 1/3 that of stainless flanges. Vacuum chambers engineers can significantly reduce overall weight of vacuum chambers The exceptional vacuum properties of titanium are within reach: The Atlas CFTI™ Flange provides standard all-metal-sealing for titanium vacuum chambers. It enables vacuum engineers and designers to fully utilize the exceptional UHV & XHV properties of Titanium.

  • The Atlas CFTI™ Flange—the Titanium flange with a titanium knife-edge seal
  • Atlas CFTI™ Flanges are suitable for service in vacuum levels to 1×10-13+ Torr and 450°C bake-out temperatures. Our titanium flanges can be welded to Titanium vacuum vessels and are the key to successful integration of Titanium UHV & XHV technology in your application.
  • Atlas titanium flanges are fully compatible with the industry standard ConFlat® flange interface. Employing CERN’s innovative 20° back-bevel (90° included angle) (Figure 1) knife-edge design, the Atlas CFTI™ Flange provides a longer service life than conventional CF flanges


  • UHV Rated to 1×10-13+ Torr
  • 1/3 the weight of stainless flanges
  • 90° included angle, long-life knife-edge design, developed at CERN
  • 100% Compatible with the industry standard ConFlat® interface.
  • Standard Flange sizes: 1.33”-16.5” (DN16-DN500)


  • Titanium Grade 5
  • Sealing Knife-Edge Face: Titanium Grade 5
  • Rotatable Collar/Receiver: Titanium 6061-T6
  • Titanium Optional


  • Vacuum Leak Tested: < 1x10E-9 cc/sec of He


  • Peak Temperature: 450°C (during weld-up)
  • Operational Temperature: -200°C to 400°C


  • Tensile: 63,000psi (434MPa)
  • Shear: 79,800psi (550MPa)

ConFlat® is a trademark of the Varian Corporation.

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Rotation Bore Bolt Holes Part # Hardware Files Actions
Non-Rotatable Blank 0.172 Clearance TICF-0133-04 Show
Non-Rotatable .63" 0.172 Clearance TICF-0133-01 Show
Non-Rotatable .63" Tapped 8-32 TICF-0133-11 Show
Non-Rotatable Blank 8-32 US Tap TICF-0133-14 Show
Non-Rotatable .63" M4x.07 mm Tap TICF-0133-21 Show
Non-Rotatable Blank M4x.07 mm Tap TICF-0133-24 Show
Rotation Bore Bolt Holes Part # Hardware Files Actions
Non-Rotatable .63" 0.172 Clearance TICF-0133-02 Show
Non-Rotatable Blank 0.172 Clearance TICF-0133-05 Show
Non-Rotatable .63" 8-32 US Tap TICF-0133-12 Show
Non-Rotatable Blank 8-32 US Tap TICF-0133-15 Show
Non-Rotatable .63" M4x.07 mm Tap TICF-0133-22 Show
Non-Rotatable Blank M4x.07 mm Tap TICF-0133-25 Show
Rotatable .63" 0.172 Clearance TICF-0133-03 Show
Rotatable Blank 0.172 Clearance TICF-0133-06 Show
Rotatable .63" 8-32 US Tap TICF-0133-13 Show
Rotatable Blank 8-32 US Tap TICF-0133-16 Show
Rotatable .63" M4x.07 mm Tap TICF-0133-23 Show
Rotatable Blank M4x.07 mm Tap TICF-0133-26 Show

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