MDC’s 2-1/8" O.D. Conflat® (CF) flange, equivalent to DN25CF with a 54.0 mm outer diameter, is designed for ultrahigh vacuum (UHV) systems requiring compact form factors and high sealing integrity. Engineered from corrosion-resistant stainless steel, this flange is built for reliable performance under extreme vacuum and high-temperature conditions. Its Conflat® compatible design ensures standardization and flexibility across vacuum system configurations in laboratory and industrial environments.

Key Features

UHV Rated: Supports vacuum levels down to 1×10⁻¹³ Torr (1.33×10⁻¹¹ Pa)
High Temperature Resistance: Withstands bake-out processes up to 450°C (842°F)
Geometry Options: Available in both rotatable and nonrotatable configurations
Seal Material Compatibility: Accepts OFE copper or optional FKM elastomer gaskets
Bolt Hole Configurations:Through-hole flanges: 4 bolt holes drilled Ø 0.265" (6.73 mm).Tapped flanges: 6 bolt holes threaded 0.250-28 UNC
Standard Interface: Fully Conflat® compatible for easy integration with CF hardware systems

Applications

The 2-1/8" CF flange is commonly used in UHV systems across scientific research, analytical instrumentation, and vacuum processing industries. Key applications include mass spectrometry, surface science, vacuum deposition, beamline systems, and electron microscopy. Its robust performance and standardized compatibility make it ideal for both OEM builds and laboratory-scale vacuum assemblies.