Rotatable Bored 304L SS Standard ConFlat® (CF) UHV Flanges
Rotatable-Bored 304L SS Standard ConFlat® (CF) UHV Flanges
The CF (ConFlat) flange is the most widely used for high vacuum and UHV applications. Many gauges, instruments, accessories and feedthroughs are available on this flange system.
The seal mechanism is a knife-edge that is machined below the flange's flat surface. As the bolts of a flange-pair are tightened, the knife-edges make annular grooves on each side of a soft metal gasket. The extruded metal fills all the machining marks and surface defects in the flange, yielding a leak-tight seal. The CF seal operates from 760 torr (103 mbar) to < 1 x 10-13 Torr (< 1.3 x 10-13 mbar), and within the temperature range -196° C to 450° C (depending on material). Flange sizes in North America are normally referenced by their outside diameter (O.D.). However, in Europe and much of Asia, the nominal internal diameter (nominal I.D.) of the largest tube that can be welded to a bored flange is usually referenced in their nomenclature.
| Parameter | Description |
|---|---|
| Type | CF Series Inner Weld Flanges |
| Material | Stainless Steel (typically 304 or 316) |
| Sealing Method | Metal Seal Ring |
| Pressure Range | High vacuum to ultra-high vacuum (typically ≤ 10^-9 Torr) |
| Temperature Range | -196°C to 450°C |
| Pipe Diameter | Customizable per client requirements |
| Welding Method | TIG (Gas Tungsten Arc Welding) or Electron Beam Welding |
| Welding Material | Welding material compatible with pipe material |
| Welding Quality | Conforms to ASTM standards or client specifications |
| Application | Ultra-high vacuum systems, laboratory equipment, semiconductor industry, etc. |
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