• Atlas CFTA™ Flanges are suitable for service in vacuum levels to 1×10 ^-13+ Torr and 250°C bake-out temperatures. Our bimetallic flanges can be easily welded to aluminum vacuum vessels and are the key to successful integration of aluminum UHV technology in your application.
• Atlas titanium-to-aluminum bimetallic 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 CFTA™ Flange provides a longer service life than conventional CF flanges.
• Atlas flanges are used in prominent HV, UHV, and XHV applications around the world. They find extensive use with semiconductor fabrication OEMs where superior heat conduction, chemical resistance, manufacturing ease, and the lower cost of aluminum vacuum systems translates into measurable productivity and cost-of-ownership advantages.

Specifications:

• 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”

Materials

• Body/Weld Interface: Aluminum 6061-T6
• Sealing Knife-Edge Face: Titanium Grade 2, Titanium (Commercially Pure) Optional
• Rotatable Collar/Receiver: Aluminum 6061-T6, Titanium Optional

Environmental

• Vacuum Leak Tested: < 1 x 10^-9 cc/sec of He

Thermal

• Peak Temperature: 300°C (during weld-up)
• Operational Temperature: -200°C to 250°C

Mechanical—Explosion Bonded Interface

• Tensile: 15,00psi (103MPa)
• Shear: 10,000psi (69MPa)