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304L SS Double-Faced ConFlat® (CF) UHV Flanges

304L SS Double-Faced ConFlat® (CF) UHV Flanges

304L SS Double-Faced ConFlat® (CF) UHV Flanges

304L SS Double-Faced ConFlat® (CF) UHV Flanges are essential components used in ultra-high vacuum (UHV) systems that demand flexible, leak-tight sealing solutions. Engineered with precision and constructed from 304L stainless steel, these double-faced flanges feature knife-edge sealing surfaces on both sides, allowing them to serve as reliable intermediary connectors between two CF flange components.

At TFM, we supply high-quality Double-Faced CF UHV Flanges that are compatible with industry-standard hardware, providing dependable performance and long-term vacuum integrity for critical scientific and industrial applications.

Key Features

✅ Dual Knife-Edge Sealing Surfaces

Each flange features knife-edge sealing on both faces, allowing it to be used as a central sealing element between two CF flanged parts—ideal for spacer or extension applications.

✅ High-Purity 304L Stainless Steel

Manufactured from 304L stainless steel, these flanges offer excellent corrosion resistance, mechanical durability, and low outgassing, ensuring optimal performance in UHV conditions.

✅ Versatile Application

Double-faced CF flanges are frequently used in research labs, vacuum chambers, thin film deposition systems, and semiconductor manufacturing, where modular and leak-tight connections are critical.

✅ Leak-Tight Performance

The ConFlat® design ensures a metal-to-metal seal using copper gaskets, enabling secure and long-lasting connections even under extreme vacuum pressures.

Applications

  • Vacuum Chamber Assembly

  • Extension and Spacer Connections

  • Thin Film Deposition

  • Mass Spectrometry Systems

  • Cryogenic and High-Temperature UHV Applications

  • Surface Science Research

Why Choose TFM?

TFM offers reliable and precision-crafted 304L SS Double-Faced ConFlat® UHV Flanges backed by expert support and consistent quality. Whether you need standard sizes or custom solutions, we ensure every product meets the highest vacuum performance standards.

Ordering Table

Flange Size/OD Type Flange Material Part Number
DN200CF (10.00" OD) Double-Faced 304L SS DFF1000X000
DN200CF (10.00" OD) Double-Faced 304L SS DFF1000X800
DN275CF (13.25" OD) Double-Faced 304L SS DFF1325X000
DN275CF (13.25" OD) Double-Faced 304L SS DFF1325X1000
DN16CF (1.33" OD) Double-Faced 304L SS DFF133X000
DN16CF (1.33" OD) Double-Faced 304L SS DFF133X062
DN25CF (2.13" OD) Double-Faced 304L SS DFF212X000
DN25CF (2.13" OD) Double-Faced 304L SS DFF212X100
DN35CF-DN40CF (2.75" OD) Double-Faced 304L SS DFF275X000
DN35CF-DN40CF (2.75" OD) Double-Faced 304L SS DFF275X150
DN35CF-DN40CF (2.75" OD) Double-Faced 304L SS DFF275X150S
DN35CF-DN40CF (2.75" OD) Double-Faced 304L SS DFF275X150SS
DN50CF (3.38" OD) Double-Faced 304L SS DFF337X000
DN50CF (3.38" OD) Double-Faced 304L SS DFF337X200
DN63CF (4.50" OD) Double-Faced 304L SS DFF450X000
DN63CF (4.50" OD) Double-Faced 304L SS DFF450X250
DN75CF (4.63" OD) Double-Faced 304L SS DFF462X000
DN75CF (4.63" OD) Double-Faced 304L SS DFF462X300
DN100CF (6.00" OD) Double-Faced 304L SS DFF600X000
DN100CF (6.00" OD) Double-Faced 304L SS DFF600X400
DN125CF (6.75" OD) Double-Faced 304L SS DFF675X000
DN125CF (6.75" OD) Double-Faced 304L SS DFF675X500
DN160CF (8.00" OD) Double-Faced 304L SS DFF800X000
DN160CF (8.00" OD) Double-Faced 304L SS DFF800X600
Flange Size/OD Type Flange Material Part Number

Accessories Table

Description For Per Package Note Manual Part Number
Gasket, Copper, DN16CF (1.33" OD) Flange , 0.837" OD, 0.640" ID, (10) Per Package 1-1/3" (DN16CF) Double-Faced CF Flanges 10 — — GA-0133
Gasket, Copper, DN25 (2.125" OD) Flange, 1.291" OD, 1.010" ID, (10) Per Package 2-1/8" (DN25CF) Double-Faced CF Flanges 10 — — GA-0212
Gasket, Copper, DN35CF-DN40CF (2.75" OD) Flange, 1.895" OD, 1.451" ID, (10) Per Package 2-3/4" (DN35-DN40CF) Double-Faced CF Flanges 10 — — GA-0275
Gasket, Copper, DN50CF (3.375" OD) Flange, 2.425" OD, 2.010" ID, (10) Per Package 3-3/8" (DN50CF) Double-Faced CF Flanges 10 — — GA-0337
Gasket, Copper, DN63CF (4.50" OD) Flange, 3.243" OD, 2.506" ID, (10) Per Package 4-1/2" (DN63CF) Double-Faced CF Flanges 10 — — GA-0450
Gasket, Copper, DN75CF (4.625" OD) Flange, 3.598" OD x 3.010" ID, (10) Per Package 4-5/8" (DN75CF) Double-Faced CF Flanges 10 — — GA-0462
Gasket, Copper, DN100CF (6.00" OD) Flange, 4.743" OD,4.006" ID, (10) Per Package 6" (DN100CF) Double-Faced CF Flanges 10 — — GA-0600
Gasket, Copper, DN125CF (6.75" OD) Flange, 5.567" OD x 5.010" ID, (10) Per Package 6-3/4" (DN125CF) Double-Faced CF Flanges 10 — — GA-0675
Gasket, Copper, DN160CF (8.00" OD) Flange, 6.743" OD, 6.007" ID, (10) Per Package 8" (DN160CF) Double-Faced CF Flanges 10 — — GA-0800
Gasket, Copper, DN200CF (10.00" OD) Flange, 8.743" OD, 8.007" ID, (10) Per Package 10" (DN200CF) Double-Faced CF Flanges 10 — — GA-1000
Gasket, Copper, DN275CF (13.25" OD) Flange, 11.590" OD, 10.845" ID, (1) Per Package 13-1/4" Double-Faced CF Flanges 1 — — GA-1325
Socket Head Cap Screw, Nut & Washer Set, Stainless Steel, (25) 8-32 x 1.25" Long Socket Head Cap Screws & (25) Flat Washers 1-1/3" (DN16CF) Double-Faced CF Flanges 25 — — SBS832125S4-25
Hex Bolt, Nut & Washer Set, Stainless Steel, (25) 1/4-28 x 2.00" Long Hex Bolts, (25) Hex Nuts, & (50) Flat Washers 2-1/8" (DN25CF) Double-Faced CF Flanges 25 1 — HBS25028200
Hex Bolt, Nut & Washer Set, Stainless Steel, (25) 1/4-28 x 2.25" Long Hex Bolts, (25) Hex Nuts, & (50) Flat Washers 2-3/4" (DN35-DN40CF) Double-Faced CF Flanges 25 1 — HBS25028225
Hex Bolt, Nut & Washer Set, Stainless Steel, (25) 5/16-24 x 2.25" Hex Bolts, (25) Hex Nuts, & (50) Flat Washers 3-3/8" (DN50CF) & 6-3/4" (DN125CF) Double-Faced CF Flanges 25 — — HBS31224225
Hex,bolt, Nut & Washer Set, Stainless Steel, (25) 5/16-24 x 2.50" Hex Bolts, (25) Hex Nuts, & (50) Flat Washers 4-1/2" (DN63CF) & 4-5/8" (DN75CF) Double-Faced CF Flanges 25 — — HBS31224250
Hex Bolt, Nut & Washer Set, Stainless Steel, (25) 5/16-24 x 3.00" Hex Bolts, (25) Hex Nuts, & (50) Flat Washers 6" (DN100CF) & 8" (DN160CF) Double-Faced CF Flanges 25 — — HBS31224300
Hex Bolt, Nut & Washer Set, Stainless Steel, (25) 5/16-24 x 3.50" Hex Bolts, (25) Hex Nuts, & (50) Flat Washers 10" (DN200CF) Double-Faced CF Flanges 25 — — HBS31224350
Hex Bolt, Nut & Washer Set, Stainless Steel, (30) 3/8-24 x 4.00" Hex Bolts, (30) Hex Nuts, & (60) Flat Washers 13-1/4" Double-Faced CF Flanges 30 — — HBS37524400
Gasket Removal Tool, For All Conflat (CF) Flange Sizes All CF Flanges 1 — — VZGRT
Thread Lubricant, 4 Ounce Tube All CF Flanges 1 — — VZTL-4OZ
Gasket Clips, For All Conflat (CF) Flange Sizes, (10) Per Package All CF Flanges 10 — 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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