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DN63CF (4.50″ OD) 304L SS Standard ConFlat® (CF) UHV Flanges

Introduction

DN63CF (4.50″ OD) 304L Stainless Steel Standard ConFlat® (CF) UHV Flanges are widely used vacuum components designed for ultra-high-vacuum (UHV) systems requiring reliable, metal-sealed connections. Featuring the industry-standard CF knife-edge design, DN63CF flanges provide repeatable, leak-tight performance in demanding environments such as semiconductor processing, surface science, and advanced research equipment.

Detailed Description

DN63CF flanges are precision-machined from vacuum-grade 304L stainless steel, chosen for its low carbon content, excellent corrosion resistance, and low outgassing characteristics. The accurately formed knife edges create a metal-to-metal seal when compressed against an OFHC copper gasket, ensuring UHV compatibility even under repeated bakeout cycles.

With a 4.50 inch (114.3 mm) outer diameter, DN63CF flanges conform fully to international ConFlat® standards, allowing seamless integration with existing CF hardware. The robust stainless steel construction maintains dimensional stability at elevated temperatures and supports long-term vacuum integrity in critical applications.

Applications

  • Ultra-high-vacuum chambers and beamlines

  • Thin film deposition systems (PVD, sputtering, evaporation)

  • Semiconductor process equipment and load-locks

  • Surface analysis instruments (XPS, AES, UHV SEM interfaces)

  • Research and industrial UHV vacuum manifolds

Technical Parameters

ParameterTypical Value / RangeImportance
Flange TypeConFlat® (CF), DN63Standard UHV interface
Outer Diameter4.50″ (114.3 mm)System compatibility
Material304L Stainless SteelLow outgassing, corrosion resistance
Sealing MethodKnife-edge with copper gasketReliable UHV sealing
Bolt PatternStandard DN63CFInterchangeable with CF hardware
Bakeout TemperatureUp to ~450 °CSuitable for UHV processes
Leak Rate≤ 1×10⁻¹⁰ mbar·L/s (typical)Maintains UHV integrity

Comparison with Related CF Flanges

Flange SizeKey AdvantageTypical Application
DN63CF (304L SS)Compact, UHV-ratedInstruments & small chambers
DN40CFSmaller footprintAnalytical ports
DN100CFLarger conductancePumping and main chamber ports

FAQ

QuestionAnswer
Are copper gaskets included?Copper gaskets are typically supplied separately unless requested.
Is DN63CF suitable for repeated bakeouts?Yes, 304L SS supports repeated high-temperature bake cycles.
Can electropolished versions be supplied?Yes, electropolished finishes are available on request.
Are custom drilling patterns available?Standard patterns are typical; custom options can be discussed.
How are knife edges protected during shipping?Protective caps are used to prevent damage.

Packaging

Our DN63CF 304L SS Standard ConFlat® UHV Flanges are thoroughly cleaned for vacuum service, with knife edges protected by caps. Each flange is individually packed using protective materials and shipped in export-grade cartons or wooden crates to ensure damage-free delivery.

Conclusion

DN63CF (4.50″ OD) 304L SS Standard ConFlat® (CF) UHV Flanges deliver proven sealing reliability, excellent thermal stability, and full compatibility with global CF standards. Their robust construction and precision machining make them an ideal choice for UHV systems in semiconductor, research, and high-technology applications.
For detailed specifications and a quotation, please contact us at sales@thinfilmmaterials.com.

Ordering Table

Flange Size/OD Type Flange Material Drawing Nominal Tube OD Bore Counter Bore Thickness Bolt Circle Dia. Bolt Hole Dia. # of Bolt Holes Thread Size Note Part Number
DN63CF (4.50" OD) Fixed 304L SS Tooltip — Blank — 0.68 3.628 0.332 8 — — F0450X000N
DN63CF (4.50" OD) Fixed Tapped 304L SS Tooltip — Blank — 0.68 3.628 — 8 M8 x 1.25P — F0450X000NM
DN63CF (4.50" OD) Fixed Tapped 304L SS Tooltip — Blank — 0.68 3.628 — 8 5/16-24 — F0450X000NT
DN63CF (4.50" OD) Rotatable 304L SS Tooltip — Blank — 0.75 3.628 0.332 8 — — F0450X000R
DN63CF (4.50" OD) Rotatable Tapped 304L SS Tooltip — Blank — 0.75 3.628 — 8 M8 x 1.25P — F0450X000RM
DN63CF (4.50" OD) Rotatable Tapped 304L SS Tooltip — Blank — 0.75 3.628 — 8 5/16-24 F0450X000RT
DN63CF (4.50" OD) Fixed 304L SS Tooltip 1-1/2 1.44 1.510 0.68 3.628 0.332 8 — — F0450X150N
DN63CF (4.50" OD) Fixed Tapped 304L SS Tooltip 1-1/2 1.44 1.510 0.68 3.628 — 8 5/16-24 — F0450X150NT
DN63CF (4.50" OD) Rotatable 304L SS Tooltip 1-1/2 1.44 1.520 0.75 3.628 0.332 8 — — F0450X150R
DN63CF (4.50" OD) Rotatable Tapped 304L SS Tooltip 1-1/2 1.44 1.520 0.75 3.628 — 8 5/16-24 — F0450X150RT
DN63CF (4.50" OD) Fixed 304L SS Tooltip 2 1.94 2.010 0.68 3.628 0.332 8 — — F0450X200N
DN63CF (4.50" OD) Fixed Tapped 304L SS Tooltip 2 1.94 2.010 0.68 3.628 — 8 5/16-24 — F0450X200NT
DN63CF (4.50" OD) Rotatable 304L SS Tooltip 2 1.94 2.020 0.75 3.628 0.332 8 — — F0450X200R
DN63CF (4.50" OD) Rotatable Tapped 304L SS Tooltip 2 1.94 2.020 0.75 3.628 — 8 5/16-24 — F0450X200RT
DN63CF (4.50" OD) Fixed 304L SS Tooltip 2-1/2 2.44 2.510 0.68 3.628 0.332 8 — — F0450X250N
DN63CF (4.50" OD) Fixed Tapped 304L SS Tooltip 2-1/2 2.44 2.510 0.68 3.628 — 8 M8 x 1.25P — F0450X250NM
DN63CF (4.50" OD) Fixed Tapped 304L SS Tooltip 2-1/2 2.44 2.510 0.68 3.628 — 8 5/16-24 — F0450X250NT
DN63CF (4.50" OD) Rotatable 304L SS Tooltip 2-1/2 2.44 2.520 0.75 3.628 0.332 8 — — F0450X250R
DN63CF (4.50" OD) Rotatable Tapped 304L SS Tooltip 2-1/2 2.44 2.520 0.75 3.628 — 8 M8 x 1.25P — F0450X250RM
DN63CF (4.50" OD) Rotatable Tapped 304L SS Tooltip 2-1/2 2.44 2.520 0.75 3.628 — 8 5/16-24 — F0450X250RT
DN63CF (4.50" OD) Fixed 304L SS Tooltip 2-3/4 2.69 2.760 0.68 3.628 0.332 8 — — F0450X275N
DN63CF (4.50" OD) Fixed Tapped 304L SS Tooltip 2-3/4 2.69 2.760 0.68 3.628 — 8 M8 x 1.25P — F0450X275NM
DN63CF (4.50" OD) Rotatable 304L SS Tooltip 2-3/4 2.69 2.770 0.75 3.628 0.332 8 — — F0450X275R
DN63CF (4.50" OD) Rotatable Tapped 304L SS Tooltip 2-3/4 2.69 2.770 0.75 3.628 — 8 M8 x 1.25P — F0450X275RM
DN63CF (4.50" OD) Rotatable Tapped 304L SS Tooltip 2-3/4 2.69 2.770 0.75 3.628 — 8 5/16-24 — F0450X275RT
DN63CF (4.50" OD) Fixed Tapped 304L SS Tooltip 2-3/4 2.69 2.760 0.68 3.628 — 8 5/16-24 — F0450X275NT

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FAQ

Tube fittings are designed for tubes (measured by outside diameter and wall thickness) used in high-pressure and instrumentation applications, whereas pipe fittings are for pipes (identified by nominal pipe size) primarily used in fluid transport.

 

Common valve types include ball valves, gate valves, check valves, butterfly valves, and globe valves. Each serves a specific function—from quick shutoff (ball/gate valves) to flow regulation (globe valves).

 

  • For tubing, measure the outside diameter; for pipes, refer to the nominal pipe size (using conversion charts if needed). Always match the valve or fitting size to your pipe’s dimensions and flow requirements.

  • Frequently used thread types include NPT (National Pipe Tapered), BSP (British Standard Pipe), and UNC, along with slip-fit options that rely on compression or fusion rather than threads.

Interchangeability depends on manufacturer specifications and certification. Always verify compatibility via manufacturer guides or certified interchangeability charts.

 

  • A coupling is a short, straight fitting used to join two pipes or tubes. It provides a secure, leak-tight connection and can sometimes serve to extend or repair piping runs.

Consider valve type, pressure and temperature ratings, material compatibility with your fluid, actuation method (manual or automatic), and maintenance requirements.

 

  • Valves regulate flow by opening, closing, or partially obstructing the pathway. Their mechanisms (such as the rotation of a ball or the linear movement of a gate) determine the speed and precision of flow control.

  • A flange is a flat, circular component used to connect pipes, valves, or other equipment. Bolted together with gaskets, flanges provide a secure, leak-proof joint that facilitates both assembly and maintenance.

  • Manual valves require physical operation via handles or levers, whereas actuated valves use mechanisms—pneumatic, electric, or hydraulic—to open and close automatically or remotely.

  • Issues include leaks caused by improper installation, over-tightening, degraded seals, material incompatibility, and fatigue from repeated cycling. Regular inspection and proper installation practices help mitigate these problems.

Regular maintenance involves periodic inspections, cleaning or replacing worn seals, ensuring proper torque during installation, and adhering to manufacturer guidelines and local plumbing codes to preserve system integrity.

 

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