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ConFlat® (CF) UHV Conical Reducer Nipples

ConFlat® (CF) UHV Conical Reducer Nipples

ConFlat® (CF) UHV Conical Reducer Nipples: Tapered Stainless Steel Adapters for Reliable CF Flange Transitions

ConFlat® (CF) UHV Conical Reducer Nipples by TFM are engineered to provide precise, leak-tight transitions between different CF flange sizes in ultra-high vacuum (UHV) systems. Constructed from 304L stainless steel tubing and terminated with standard knife-edge CF flanges, these conical reducer nipples are ideal for applications where vacuum integrity and clean flow dynamics are critical.

The conical geometry ensures a gradual internal transition between flange sizes, reducing gas turbulence and conductance loss across connections. These components are widely used in UHV-compatible instrumentation, vacuum chambers, beamlines, and research equipment where mixed flange sizes must be integrated seamlessly.

Key Features of ConFlat® (CF) UHV Conical Reducer Nipples:

  • Tapered Conical Design
    The reducer shape enables a smooth, controlled flow path between two flange sizes, helping maintain vacuum performance and minimizing system impedance.

  • CF Knife-Edge Flanges
    Each ConFlat® (CF) UHV Conical Reducer Nipple includes one larger and one smaller CF flange—commonly CF63 to CF40 or CF40 to CF16—compatible with copper gasket sealing in UHV environments.

  • 304L Stainless Steel Construction
    These ConFlat® (CF) UHV Conical Reducer Nipples are fabricated from vacuum-grade stainless steel, chosen for its corrosion resistance, low outgassing properties, and weldability.

  • Ultra-High Vacuum Compatibility
    Designed for use in systems operating down to 10⁻¹⁰ torr or lower, these nipples ensure long-term leak-tightness when properly sealed with bolts and copper gaskets.

  • Customizable Dimensions
    TFM offers standard configurations of ConFlat® (CF) UHV Conical Reducer Nipples and can also produce custom flange combinations and tube lengths upon request.

Applications:

  • Connecting CF flanges of different sizes in UHV chamber ports

  • Adapting instrumentation or diagnostic tools with smaller CF connectors

  • Reducing pipeline dimensions in beamline setups or spectroscopy systems

  • Transitioning between legacy and modern CF sizes in retrofitted equipment

  • Supporting gas, ion, or electron transport paths with minimal conductance drop

TFM also supplies related components such as straight CF reducer nipples, half and full CF nipples, copper gaskets, bolt sets, and rotatable flange assemblies, making it easy to build or modify complete UHV flange systems.

Ordering Table

Flange Size/OD (Large) Flange Size/OD (Small) Part Number
DN16CF (1.33" OD) DN16CF (1.33" OD) CRN212X133
DN16CF (1.33" OD) DN16CF (1.33" OD) CRN275X133
DN25CF (2.13" OD) DN25CF (2.13" OD) CRN275X212
DN25CF (2.13" OD) DN25CF (2.13" OD) CRN337X212
DN35CF-DN40CF (2.75" OD) DN35CF-DN40CF (2.75" OD) CRN337X275
DN35CF-DN40CF (2.75" OD) DN35CF-DN40CF (2.75" OD) CRN450X275
DN50CF (3.38" OD) DN50CF (3.38" OD) CRN450X337
DN35CF-DN40CF (2.75" OD) DN35CF-DN40CF (2.75" OD) CRN462X275
DN50CF (3.38" OD) DN50CF (3.38" OD) CRN462X337
DN63CF (4.50" OD) DN63CF (4.50" OD) CRN462X450
DN50CF (3.38" OD) DN50CF (3.38" OD) CRN600X337
DN63CF (4.50" OD) DN63CF (4.50" OD) CRN600X450

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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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