KF-CeFiX flanges
Unlike the CF system, where a knife edge creates a circular imprint that can shift upon reuse and cause vacuum leaks, CeFiX® uses a particle-free area-pressing mechanism. This design allows the seals to be reused and eliminates the leakage issues caused by the CF system's deep groove imprints. The wider overlapping area, with a 200 to 400µm cross-section, enhances thermocycling capability, handling temperatures from -271°C to +450°C conditions that typically compromise the CF knife edge after one cycle.

The CeFiX® system’s robust EUHV connection (<10E-11 mbar, <1 nPa) can withstand overpressures up to 300 bar when used with TÜV-approved chain clamps. Hard nickel seals, which resist CF knife edge penetration, are easily compressed with CeFiX®’s gear-type force-multiplying chain clamps. This technology requires only 50% of the CF system's compression force at the seal surface while ensuring gas-tight intermetallic diffusion bonds.
產品詳細資料
Applications
 
- UHV applications up to 10E-11 mbar
- Pressurized applications up to 300 bar
- Cryo applications down to -270 degC
- Oven applications up to 300 degC (copper seals)
- CeFiX® system registered  by EVAC
- Flange seals reusable up to 10 times (provided no scratches)
- 316L stainless steel for nuclear and military applications
- Helium leak test notches provided
 
 
EVAC KF-CeFiX® flanges, UHV
NW A B C D E L
16 30 21.4 16 20 - 22
25 40 32.9 24 28 - 22
40 55 48.3 40 44.5 - 27
50 75 61.8 50 57 - 30
63 87 82.5 70 76 - 30
16(US)* 30 21.4 16 20 19 22
25(US)* 40 32.9 24 28 27 22
40(US)* 55 48.3 35 44.5 38 27
* US size dimensions in mm
 
Type NW SUS 316L SUS 316L
16 32.016005.631.316 32.016005.637.316
25 32.025005.631.325 32.025005.637.325
40 32.040005.631.340 32.040005.637.340
50 32.050005.637.350  
63 32.063005.631.363