MDC’s 14" Outer Diameter (355.6 mm) Conflat® (CF) flange, precision-machined from durable 304 stainless steel, is built to meet the demands of ultrahigh vacuum (UHV) systems requiring robust performance, high leak integrity, and elevated thermal stability. With a nominal flange designation of DN500CF, this large-format flange is ideal for high-vacuum environments where reliable, repeatable sealing is critical.

Key Features

UHV Performance: Rated to 1x10⁻¹³ Torr (1.33×10⁻¹¹ Pa) for ultrahigh vacuum reliability
High Temperature Capability: Supports continuous use up to 450°C (842°F)
Material: Made from 304 stainless steel for corrosion resistance and mechanical strength
Design Options: Available in rotatable and nonrotatable formats
Gasket Compatibility: Accepts OFE copper and optional FKM elastomer seals
Standard Interface: Fully Conflat® compatible with industry-standard CF systems
Bolt Hole Options:
Through-hole flanges: 30 holes drilled to 0.390" (9.91 mm)
Tapped flanges: 30 holes threaded to 0.375-24 UNF

Applications

The 14" CF flange is widely used in large-diameter UHV systems for aerospace testing, surface science instruments, particle accelerator beamlines, vacuum metallurgy, semiconductor tooling, and thin-film deposition processes. Its rugged design and exceptional vacuum sealing performance make it ideal for high-energy research labs, space simulation environments, and complex vacuum chamber assemblies operating under demanding conditions.