cf-flange
CF Flange
Sanitary Fittings

The CF Flange Is a type of vacuum flange used in ultra-high vacuum (UHV) applications, such as scientific research, semiconductor manufacturing, and particle accelerators.  CF flanges use a knife-edge sealing mechanism, where the flange’s sharp edges deform the copper gasket upon tightening, forming a leak-tight seal.

Our CF flanges are appreciated for their dimensional accuracy, smooth finish, and leak-proof performance.  Our product line includes CF bored flanges, CF blank flanges, CF double side flanges, with sizes ranging from CF16 to CF350.  The available materials are stainless steel 304 and 316L.

Material： Stainless Steel 304, 316L
Size： CF16 ~ CF350
Vacuum Range： Down to 10-13 Torr

Available Parts：
CF16 Mini Bored Flange, Fixed SS304
CF16 Mini Bored Flange, Tapped Bolt Holes, Fixed SS304
CF16 Mini Bored Flange, Rotatable SS304
CF16 Mini Bored Flange, Tapped Bolt Holes, Rotatable SS304
CF Blank Flange, Fixed SS304
CF Blank Flange, Tapped Bolt Holes, Fixed SS304
CF Blank Flange, Rotatable SS304
CF Blank Flange, Tapped Bolt Holes, Rotatable SS304
CF Bored Flange, Fixed SS304
CF Bored Flange, Tapped Bolt Holes, Fixed SS304
CF Bored Flange, Rotatable SS304
CF Bored Flange, Tapped Bolt Holes, Rotatable SS304
CF Double Side Bored Flange SS304
CF Double Side Blank Flange SS304
CF Reducing Flange SS304
  • CF16 Mini Bored Flange, Fixed SS304

    F1

    F2

    F3

    Model No. Type A B C D ExNo.
    BF-CF16-7 F1 33.8 7.5 6.5 - 4.4x6
    BF-CF16-12 F2 33.8 7.5 9.5 12.90 4.4x6
    BF-CF16-19 F2 33.8 7.5 16.0 19.15 4.4x6
    BF-CF16-N7 F3 33.8 12.7 4.5 6.35 4.4x6
    BF-CF16-N12 F3 33.8 12.7 9.5 12.70 4.4x6
    BF-CF16-N19 F3 33.8 12.7 16.0 19.05 4.4x6
  • CF16 Mini Bored Flange, Tapped Bolt Holes, Fixed SS304

    F1

    F2

    F3

    Model No. Type A B C D ExNo.
    BF-CF16-T7 F1 33.8 7.5 6.5 - M4x6
    BF-CF16-T12 F2 33.8 7.5 9.5 12.90 M4x6
    BF-CF16-T19 F2 33.8 7.5 16.0 19.15 M4x6
    BF-CF16-TN7 F3 33.8 12.7 4.5 6.35 M4x6
    BF-CF16-TN12 F3 33.8 12.7 9.5 12.70 M4x6
    BF-CF16-TN19 F3 33.8 12.7 16.0 19.05 M4x6
  • CF16 Mini Bored Flange, Rotatable SS304

    F1

    F2

    Model No. Type A B C D E FxNo.
    BF-CR16-7 F1 33.8 7.5 4.5 6.50 6.60 4.4x6
    BF-CR16-12 F1 33.8 7.5 9.5 12.90 13.00 4.4x6
    BF-CR16-19 F1 33.8 7.5 16.0 19.05 19.15 4.4x6
    BF-CR16-N7 F2 33.8 12.7 4.5 6.35 6.45 4.4x6
    BF-CR16-N12 F2 33.8 12.7 9.5 12.70 13.00 4.4x6
    BF-CR16-N19 F2 33.8 12.7 16.0 19.05 19.15 4.4x6
  • CF16 Mini Bored Flange, Tapped Bolt Holes, Rotatable SS304

    F1

    F2

    Model No. Type A B C D E FxNo.
    BF-CR16-T7 F1 33.8 7.5 4.5 6.50 6.60 M4x6
    BF-CR16-T12 F1 33.8 7.5 9.5 12.90 13.00 M4x6
    BF-CR16-T19 F1 33.8 7.5 16.0 19.05 19.15 M4x6
    BF-CR16-TN7 F2 33.8 12.7 4.5 6.35 6.45 M4x6
    BF-CR16-TN12 F2 33.8 12.7 9.5 12.70 13.00 M4x6
    BF-CR16-TN19 F2 33.8 12.7 16.0 19.05 19.15 M4x6
  • CF Blank Flange, Fixed SS304
    Model No. A B CxNo.
    BL-CF16 33.80 7.5 4.4x6
    BL-CF35 69.50 12.7 6.7x6
    BL-CF63 113.60 18.0 8.4x8
    BL-CF100 151.60 20.0 8.4x16
    BL-CF150 202.50 22.0 8.4x20
    BL-CF200 253.20 24.7 8.4x24
    BL-CF250 336.55 28.5 10.3x30
    BL-CF300 355.60 28.5 10.3x30
    BL-CF350 419.10 28.5 10.3x36
  • CF Blank Flange, Tapped Bolt Holes, Fixed SS304
    Model No. A B CxNo.
    BL-CFT16 33.80 7.5 M4x6
    BL-CFT35 69.50 12.7 M6x6
    BL-CFT63 113.60 18.0 M8x8
    BL-CFT100 151.60 20.0 M8x16
    BL-CFT150 202.50 22.0 M8x20
    BL-CFT200 253.20 24.7 M8x24
    BL-CFT250 336.55 28.5 M10x30
    BL-CFT300 355.60 28.5 M10x30
    BL-CFT350 419.10 28.5 M10x36
  • CF Blank Flange, Rotatable SS304
    Model No. A B CxNo.
    BL-CR16 33.80 7.5 4.4x6
    BL-CR35 69.50 12.7 6.7x6
    BL-CR63 113.60 19.0 8.4x8
    BL-CR100 151.60 21.5 8.4x16
    BL-CR150 202.50 24.0 8.4x20
    BL-CR200 253.20 25.0 8.4x24
    BL-CR250 336.55 28.5 10.3x30
    BL-CR300 355.60 28.5 10.3x30
    BL-CR350 419.10 28.5 10.3x36
  • CF Blank Flange, Tapped Bolt Holes, Rotatable SS304
    Model No. A B CxNo.
    BL-CRT16 33.80 7.5 M4x6
    BL-CRT35 69.50 12.7 M6x6
    BL-CRT63 113.60 18.0 M8x8
    BL-CRT100 151.60 20.0 M8x16
    BL-CRT150 202.50 22.0 M8x20
    BL-CRT200 253.20 24.7 M8x24
    BL-CRT250 336.55 28.5 M10x30
    BL-CRT300 355.60 28.5 M10x30
    BL-CRT350 419.10 28.5 M10x36
  • CF Bored Flange, Fixed SS304
    Model No. A B C D FxNo.
    BF-CF35-25 69.50 12.7 23.40 25.60 6.7x6
    BF-CF35-38 69.50 12.7 35.50 38.30 6.7x6
    BF-CF35-41 69.50 12.7 40.10 41.30 6.7x6
    BF-CF63-51 113.60 18.0 49.60 51.10 8.4x8
    BF-CF63-63 113.60 18.0 60.40 63.70 8.4x8
    BF-CF100-100 151.60 20.0 97.50 101.80 8.4x16
    BF-CF150-150 202.50 22.0 147.60 152.80 8.4x20
    BF-CF200-200 253.20 24.7 198.90 203.70 8.4x24
    BF-CF250-250 336.55 28.5 250.00 254.50 10.3x30
    BF-CF300-300 355.60 28.5 298.45 305.40 10.3x30
    BF-CF350-350 419.10 28.5 349.25 356.10 10.3x36
  • CF Bored Flange, Tapped Bolt Holes, Fixed SS304
    Model No. A B C D FxNo.
    BF-CFT35-25 69.50 12.7 23.40 25.60 M6x6
    BF-CFT35-38 69.50 12.7 35.50 38.30 M6x6
    BF-CFT35-41 69.50 12.7 40.10 41.30 M6x6
    BF-CFT63-51 113.60 18.0 49.60 51.10 M8x8
    BF-CFT63-63 113.60 18.0 60.40 63.70 M8x8
    BF-CFT100-100 151.60 20.0 97.50 101.80 M8x16
    BF-CFT150-150 202.50 22.0 147.60 152.80 M8x20
    BF-CFT200-200 253.20 24.7 198.90 203.70 M8x24
    BF-CFT250-250 336.55 28.5 250.00 254.50 M10x30
    BF-CFT300-300 355.60 28.5 298.45 305.40 M10x30
    BF-CFT350-350 419.10 28.5 349.25 356.10 M10x36
  • CF Bored Flange, Rotatable SS304
    Model No. A B C D E FxNo.
    BF-CR35-25 69.50 12.7 23.40 25.60 39.0 6.7x6
    BF-CR35-38 69.50 12.7 35.50 38.30 39.0 6.7x6
    BF-CR35-41 69.50 12.7 40.10 41.30 39.0 6.7x6
    BF-CR63-51 113.60 19.0 49.60 51.10 67.0 8.4x8
    BF-CR63-63 113.60 19.0 60.40 63.70 67.0 8.4x8
    BF-CR100-100 151.60 21.5 97.50 101.80 105.0 8.4x16
    BF-CR150-150 202.50 24.0 147.60 152.80 155.5 8.4x20
    BF-CR200-200 253.20 25.0 198.90 203.70 206.5 8.4x24
    BF-CR250-250 336.55 28.5 250.00 254.50 258.5 10.3x30
    BF-CR300-300 355.60 28.5 298.45 305.40 308.6 10.3x30
    BF-CR350-350 419.10 28.5 349.25 356.10 358.7 10.3x36
  • CF Bored Flange, Tapped Bolt Holes, Rotatable SS304
    Model No. A B C D E FxNo.
    BF-CRT35-25 69.50 12.7 23.40 25.60 39.0 M6x6
    BF-CRT35-38 69.50 12.7 35.50 38.30 39.0 M6x6
    BF-CRT35-41 69.50 12.7 40.10 41.30 39.0 M6x6
    BF-CRT63-51 113.60 19.0 49.60 51.10 67.0 M8x8
    BF-CRT63-63 113.60 19.0 60.40 63.70 67.0 M8x8
    BF-CRT100-100 151.60 21.5 97.50 101.80 105.0 M8x16
    BF-CRT150-150 202.50 24.0 147.60 152.80 155.5 M8x20
    BF-CRT200-200 253.20 25.0 198.90 203.70 206.5 M8x24
    BF-CRT250-250 336.55 28.5 250.00 254.50 258.5 M10x30
    BF-CRT300-300 355.60 28.5 298.45 305.40 308.6 M10x30
    BF-CRT350-350 419.10 28.5 349.25 356.10 358.7 M10x36
  • CF Double Side Bored Flange SS304
    Model No. A B C
    DSBF-CF16 33.80 7.50 16.00
    DSBF-CF35 69.50 12.70 35.50
    DSBF-CF63 113.60 18.00 60.40
    DSBF-CF100 151.60 20.00 97.50
    DSBF-CF150 202.50 22.00 147.60
    DSBF-CF200 253.20 24.70 198.90
    DSBF-CF250 336.55 28.50 250.00
    DSBF-CF300 355.60 28.50 298.45
    DSBF-CF350 419.10 28.50 349.25
  • CF Double Side Blank Flange SS304
    Model No. A B
    DSBL-CF16 33.80 7.5
    DSBL-CF35 69.50 12.7
    DSBL-CF63 113.60 18.0
    DSBL-CF100 151.60 20.0
    DSBL-CF150 202.50 22.0
    DSBL-CF200 253.20 24.7
    DSBL-CF250 336.55 28.5
    DSBL-CF300 355.60 28.5
    DSBL-CF350 419.10 28.5
  • CF Reducing Flange SS304
    Model No. A B CxNo. D
    RF-CF35-16 69.5 12.7 M4x6 26.9
    RF-CF63-16 113.5 18.0 M4x6 26.9
    RF-CF63-35 113.6 18.0 M6x6 58.7
    RF-CF100-35 151.6 20.0 M6x6 58.7
    RF-CF100-63 151.6 20.0 M8x8 92.1
    RF-CF150-35 202.5 22.0 M6x6 58.7
    RF-CF150-63 202.5 22.0 M8x8 92.7
    RF-CF150-100 202.5 22.0 M8x16 130.3
    RF-CF200-35 253.2 24.7 M6x6 58.7
    RF-CF200-63 253.2 24.7 M8x8 92.1
    RF-CF200-100 253.2 24.7 M8x16 130.3
    RF-CF200-150 253.2 24.7 M8x20 181.0
    RF-CF250-35 336.55 28.5 M6x6 58.7
    RF-CF250-63 336.55 28.5 M8x8 92.1
    RF-CF250-100 336.55 28.5 M8x16 130.3
    RF-CF250-150 336.55 28.5 M8x20 181.0
    RF-CF250-200 336.55 28.5 M8x24 231.8
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