MDC’s 3-3/8" O.D. Conflat® (CF) flange, classified as DN50CF, is precision-machined from corrosion-resistant 304 stainless steel and is ideal for ultrahigh vacuum (UHV) systems where high thermal stability and leak-tight sealing are critical. With an outer diameter of 3.375" (85.73 mm), this flange is available in rotatable and nonrotatable configurations and is fully compatible with standard CF vacuum hardware, ensuring reliable integration in demanding scientific and industrial applications.

Key Features

Material: 304 stainless steel construction for corrosion resistance and durability
UHV Performance: Rated to 1×10⁻¹³ Torr (1.33×10⁻¹¹ Pa)
High Temperature Rating: Withstands bake-out temperatures up to 450°C (842°F)
Geometry Options: Available in rotatable and nonrotatable versions
Gasket Compatibility: Supports OFE copper or optional FKM elastomer gaskets
Bolt Hole Configurations:
Through-hole flanges: 8 bolt holes drilled Ø 0.332" (8.43 mm)
Tapped flanges: 8 bolt holes threaded 0.312-24 UNF
Conflat® Compatible Design: Fully standardized for UHV system integration

Applications

The 3-3/8" Conflat® flange (DN50CF) is widely used in vacuum systems for semiconductor manufacturing, surface science, thin film deposition, X-ray systems, and research instrumentation. Its precision sealing and thermal stability make it essential for electron microscopy, mass spectrometry, beamline equipment, and analytical vacuum chambers where performance under UHV conditions is non-negotiable.