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
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