MDC’s 4-1/2" O.D. Conflat® (CF) flange, designated as DN63CF, is engineered for use in ultrahigh vacuum (UHV) environments where consistent leak-tight sealing and high thermal stability are essential. With an outer diameter of 4.5 inches (114.3 mm), this flange is precision-machined from 304 stainless steel and is available in both rotatable and nonrotatable designs. Its standard Conflat® compatibility and multiple bolt hole configurations make it an ideal choice for vacuum chambers, analytical equipment, and high-vacuum process systems.

Key Features

Vacuum Rating: UHV performance down to 1×10⁻¹³ Torr (1.33×10⁻¹¹ Pa)
High Temperature Tolerance: Supports bake-outs up to 450°C (842°F)
Geometry Options: Available in rotatable and nonrotatable formats
Gasket Compatibility: Works with OFE copper or optional FKM elastomer gaskets
Bolt Hole Options:
• Through-hole: 8 bolt holes drilled Ø 0.332" (8.43 mm)
• Tapped: 8 bolt holes threaded 0.312-24 UNF
Conflat® Compatible Design: Ensures seamless integration with industry-standard CF components

Applications

The 4-1/2" Conflat® flange (DN63CF) is widely used in UHV systems for applications in semiconductor processing, surface science, vacuum deposition, mass spectrometry, synchrotron beamlines, and aerospace simulation chambers. Its durable stainless steel construction, high thermal resistance, and precise sealing performance make it a trusted solution for both research laboratories and industrial vacuum assemblies.