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Conflat (CF) UHV 5-Way Standard Crosses

Conflat (CF) UHV 5-Way Standard Crosses

Introduction

Conflat (CF) UHV 5-Way Standard Crosses are precision-machined vacuum components designed for ultra-high vacuum (UHV) systems requiring multiple orthogonal ports. Featuring knife-edge Conflat (CF) flanges, these crosses ensure leak-tight metal-to-metal sealing with copper gaskets, supporting vacuum levels down to 10⁻¹¹ mbar or lower.

5-way CF crosses are widely used in research laboratories, thin film deposition systems, surface science experiments, and semiconductor processing equipment where flexible port configuration and reliable sealing performance are critical.

Detailed Description

CF UHV 5-Way Standard Crosses are typically manufactured from high-quality 304L or 316L stainless steel with vacuum-grade finishing. The precision-machined knife-edge flange design compresses a soft copper gasket to form a permanent, bakeable seal capable of withstanding high-temperature degassing cycles.

Structural features include:

  • Five CF flange ports arranged in orthogonal configuration

  • Precision-machined knife edges for reliable sealing

  • Vacuum-cleaned and degreased surfaces

  • Smooth internal bore for optimized gas conductance

  • High structural rigidity for heavy instrument mounting

Available flange sizes commonly include:

  • CF16

  • CF35

  • CF63

  • CF100

  • CF160

  • Custom combinations (e.g., mixed port sizes)

These crosses allow integration of gauges, viewports, sputtering sources, manipulators, and pumping lines in compact UHV assemblies. Their symmetric geometry simplifies chamber layout and system alignment.

Applications

Conflat (CF) UHV 5-Way Standard Crosses are widely used in:

  • Ultra-high vacuum research systems

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

  • Surface analysis equipment (XPS, AES, SEM interfaces)

  • Semiconductor processing systems

  • Particle accelerators and beamlines

  • Cryogenic and superconducting experiments

  • Custom-built vacuum manifolds

Their multi-port design enables efficient distribution of instrumentation and pumping lines in complex vacuum systems.

Technical Parameters

ParameterTypical Value / RangeImportance
Material304L / 316L Stainless SteelEnsures corrosion resistance & vacuum compatibility
Flange TypeCF (Conflat) Knife-EdgeProvides metal-to-metal UHV sealing
Leak Rate≤ 1 × 10⁻¹⁰ mbar·L/sEnsures ultra-high vacuum integrity
Bakeout TemperatureUp to ~450°C (gasket dependent)Supports UHV degassing procedures
Surface FinishVacuum cleanedMinimizes outgassing
Port Configuration5-way standard crossEnables multi-directional system integration

Custom port sizes, mixed flange configurations, and special finishes can be provided upon request.

Comparison with Related Vacuum Components

ComponentKey AdvantageTypical Application
CF 5-Way CrossMulti-port UHV connectionResearch & deposition systems
CF 4-Way CrossSimpler configurationCompact manifolds
CF Tee3-port distributionLinear vacuum lines
ISO-K CrossQuick clamp assemblyHigh vacuum (not UHV)

Compared to ISO-K systems, CF crosses provide superior sealing performance for true UHV applications due to metal gasket sealing technology.

FAQ

QuestionAnswer
What gasket is used for sealing?Oxygen-free high conductivity (OFHC) copper gaskets are typically used.
Are mixed flange sizes available?Yes, customized port combinations can be manufactured.
Is the component suitable for UHV bakeout?Yes, CF components are bakeable to high temperatures.
What material grade is recommended?304L and 316L stainless steel are standard for UHV compatibility.
Are cleaning and leak testing provided?Yes, vacuum cleaning and helium leak testing can be supplied upon request.

Packaging

Our Conflat (CF) UHV 5-Way Standard Crosses are meticulously tagged and labeled externally to ensure efficient identification and maintain high standards of quality control. Each unit is carefully packaged with protective flange covers and cushioning materials to prevent damage during storage and transportation.

Conclusion

Conflat (CF) UHV 5-Way Standard Crosses provide robust, leak-tight multi-port connectivity for advanced vacuum systems. With precision machining, high-quality stainless steel construction, and reliable knife-edge sealing, they are ideal for demanding ultra-high vacuum applications in research and industrial environments.

For detailed specifications and a quotation, please contact us at sales@thinfilmmaterials.com.

Ordering Table

Flange Size/OD Flange Material Drawing Part Number
DN25CF (2.13" OD) 304L SS Tooltip C5-0133
DN50CF (3.38" OD) 304L SS Tooltip C5-0212
DN63CF (4.50" OD) 304L SS Tooltip C5-0275
DN100CF (6.00" OD) 304L SS Tooltip C5-0337
DN125CF (6.75" OD) 304L SS Tooltip C5-0450
DN160CF (8.00" OD) 304L SS Tooltip C5-0450S
DN275CF (13.25" OD) 304L SS Tooltip C5-0462
DN25CF (2.13" OD) 304L SS Tooltip C5-0600
DN63CF (4.50" OD) 304L SS Tooltip C5-0600S
DN125CF (6.75" OD) 304L SS Tooltip C5-0675
DN275CF (13.25" OD) 304L SS Tooltip C5-0800
DN63CF (4.50" OD) 304L SS Tooltip C5-0800S
DN275CF (13.25" OD) 304L SS Tooltip C5-1000
DN275CF (13.25" OD) 304L SS Tooltip C5-1325

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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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