UHV ConFlat® Flange Assembly

CF fittings have a unique sealing system to achieve a leak tight joint. A copper seal is squeezed axially and radially between two CF flanges, where knife-edges force the copper to cold flow. This flow is severely limited by the vertical flange wall which generates high pressures and fills surface imperfections to prove an extremely tight metal to metal seal.

• Manufactured to ISO 3669 standard

• Nominal diameters 16-350 mm

• Used almost exclusively with copper ring metal seals

• Bakeable up to 450 °C

• Typically used in UHV systems: pressures < 10-8 mbar

CF Dimensions

DN16CF

DN40CF

DN63CF

DN100CF

DN16CF

DN200CF

DN250CF

A(mm)

34

70

114

152

202

253

306

B

27

58.7

92.1

130.2

181

231.8

284

C

4.4

6.6

8.4

8.4

8.4

8.4

8.4

D

-

-

6

6

6

6

6

E

-

-

3

3

3

3

3

Bolt Holes

6

6

8

16

20

24

32

Documentation

Spectroscopy magazine

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