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Flex Metal Edge-Welded Bellows with ConFlat (CF) Flanges

Flex Metal Edge-Welded Bellows with ConFlat (CF) Flanges

Flex Metal Edge-Welded Bellows with ConFlat (CF) Flanges, manufactured by TFM, are engineered to provide superior flexibility, durability, and leak-tight performance for ultra-high vacuum (UHV) systems. These bellows are designed to handle axial, lateral, and angular movements in vacuum applications while ensuring reliable sealing and maintaining the integrity of the vacuum system. The edge-welded design guarantees excellent strength and resistance to fatigue, making them an essential component in high-performance UHV chambers, semiconductor processing equipment, and other sensitive environments.

Key Features

  • Edge-Welded Design for Maximum Durability
    The edge-welded construction of the bellows provides enhanced strength, resistance to fatigue, and extended service life, making them suitable for applications with frequent or large movements.

  • ConFlat (CF) Flanges for Leak-Tight Sealing
    These bellows are equipped with ConFlat (CF) flanges, ensuring a reliable, metal-to-metal seal with CF flanges. This design allows them to perform at high vacuum levels (down to 10⁻¹¹ Torr) without compromising the vacuum integrity.

  • Flexible and Reliable Movement Accommodation
    Designed to accommodate axial, lateral, and angular movements, these bellows provide exceptional flexibility while maintaining a tight seal, even in systems that undergo frequent shifts or require high movement.

  • Corrosion and Abrasion Resistance
    Made from high-quality materials, these bellows resist corrosion and wear, ensuring longevity even in harsh environments where high temperatures and reactive gases are present.

  • Precise Manufacturing for Optimal Performance
    These bellows are manufactured to tight tolerances to ensure excellent sealing performance and reliable operation in demanding vacuum systems.

Applications

  • UHV and High-Vacuum Systems
    Ideal for use in UHV systems where consistent sealing is required despite motion, such as in research laboratories and particle accelerators, where any vacuum leak would compromise performance.

  • Semiconductor Processing
    Used extensively in semiconductor manufacturing systems, these bellows ensure reliable performance in thin-film deposition, etching, and other processes that involve vacuum chambers subject to movement.

  • Cryogenic and High-Temperature Systems
    Suitable for applications in both cryogenic and high-temperature environments, these bellows can withstand extreme temperature ranges while providing reliable flexibility and vacuum sealing.

  • Vacuum Chambers with Moving Parts
    Perfect for systems that include moving components, such as manipulators, linear actuators, or robotic arms, where axial and lateral movements are frequent.

Technical Specifications

  • Material Options: Stainless steel, Inconel, Monel, and other compatible alloys

  • Flange Type: ConFlat (CF) Flanges

  • Vacuum Rating: Down to 10⁻¹¹ Torr

  • Temperature Tolerance: From cryogenic temperatures to 450°C

  • Movement Type: Axial, lateral, and angular flexing

  • Pressure Rating: Suitable for high-vacuum and UHV applications

  • Available Sizes: Customizable to fit various flange sizes and system requirements

Benefits of Flex Metal Edge-Welded Bellows

  • Long-Term Reliability: Edge-welded bellows are designed for maximum durability, offering extended service life even in high-motion and high-stress applications.

  • Flexibility with Tight Seals: These bellows maintain a reliable seal while accommodating a wide range of movements, ensuring performance even in dynamic vacuum systems.

  • Corrosion and Abrasion Resistance: The materials used offer superior resistance to corrosion, abrasion, and wear, ensuring long-lasting performance.

  • High Vacuum Performance: With ConFlat (CF) flanges, these bellows maintain leak-tight sealing at ultra-high vacuum levels, preventing system contamination.

Why Choose TFM?

TFM’s Flex Metal Edge-Welded Bellows with ConFlat (CF) Flanges provide a reliable, flexible solution for sealing high-vacuum systems that require movement accommodation. Whether you’re dealing with high-precision research or industrial processes, these bellows deliver exceptional performance, ensuring a long-lasting and leak-tight seal under demanding conditions.

Ordering Table

Drawing FlangeSize BellowsOD BellowsID Part Number
Tooltip 1-1/3" 0.75 0.25 MEW0750251C1
Tooltip 1-1/3" 1.03 0.55 MEW1030551C2
Tooltip 1-1/3" 1.03 0.55 MEW1030551C3
Tooltip 2-3/4" 1.5 0.96 MEW1500961C1
Tooltip 2-3/4" 1.89 1.39 MEW1891391C2
Tooltip 2-3/4" 1.89 1.39 MEW1891391C3
Tooltip 3-3/8" 2 1.25 MEW2001251C1
Tooltip 2-3/4" 2.25 1.5 MEW2251501C2
Tooltip 2-3/4" 2.25 1.5 MEW2251501C3
Tooltip 4-1/2" 2.75 1.75 MEW2751751C1
Tooltip 3-3/8" 3 2 MEW3002001C2
Tooltip 3-3/8" 3 2 MEW3002001C3
Tooltip 4-1/2" 3.5 2.5 MEW3502501C2
Tooltip 4-1/2" 3.5 2.5 MEW3502501C3
Tooltip 6" 4.97 4 MEW4974001C3
Tooltip 8" 7.5 6 MEW7506001C3
Tooltip 10" 9.8 8.8 MEW9508501C3

Accessories Table

Description For Per Package Manual VacuCADSM Part Number
Gasket, Copper, DN16CF (1.33" OD) Flange , 0.837" OD, 0.640" ID, (10) Per Package 1-1/3" (DN16CF) Flanges 10 N/A GA-0133
Gasket, Copper, DN35CF-DN40CF (2.75" OD) Flange, 1.895" OD, 1.451" ID, (10) Per Package 2-3/4" (DN35-DN40CF) Flanges 10 N/A GA-0275
Gasket, Copper, DN50CF (3.375" OD) Flange, 2.425" OD, 2.010" ID, (10) Per Package 3-3/8" (DN50CF) Flanges 10 N/A GA-0337
Gasket, Copper, DN63CF (4.50" OD) Flange, 3.243" OD, 2.506" ID, (10) Per Package 4-1/2" (DN63CF) Flanges 10 N/A GA-0450
Gasket, Copper, DN100CF (6.00" OD) Flange, 4.743" OD,4.006" ID, (10) Per Package 6" (DN100CF) Flanges 10 N/A GA-0600
Gasket, Copper, DN160CF (8.00" OD) Flange, 6.743" OD, 6.007" ID, (10) Per Package 8" (DN160CF) Flanges 10 N/A GA-0800
Gasket, Copper, DN200CF (10.00" OD) Flange, 8.743" OD, 8.007" ID, (10) Per Package 10" (DN200CF) Flanges 10 N/A GA-1000
Thread Lubricant, 4 Ounce Tube All CF Flanges 1 N/A VZTL-4OZ
Gasket Removal Tool, For All Conflat (CF) Flange Sizes All CF Flanges 1 N/A VZGRT
Gasket Clips, For All Conflat (CF) Flange Sizes, (10) Per Package All CF Flanges 10 N/A VGC0275S

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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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