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CF to KF (QF) HV Adapter Flanges

Adapter flanges allow the mating of one type of flange system to another. All of our flange adapters are manufactured from 304 series stainless steel tubing and flanges.

Note:

Mixing flange types using adapters is possible but not recommended unless necessary to match existing components or fittings. However, using one flange type for chamber-mounted components and another type for foreline components is common practice.

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Ordering Table

(Click column headers to sort data)

Flange Size/OD

Drawing

Nominal Tube OD

Flange Adapter

Dim A

Description

VacuCAD^SM

Part Number

Price

In Stock

Add To Cart

Flange Size/OD

Drawing

Nominal Tube OD

Flange Adapter

Dim A

Description

VacuCAD^SM

Part Number

Price

In Stock

Add To Cart

DN16CF (1.33" OD)

3/4

KF16

1.75

ADAPTER,SS,1.33"UHV FLANGE TO QF16 FLANGE

(please log in)

F0133XQF16

$65.30

DN16CF (1.33" OD)

3/4

KF25

1.62

ADAPTER,SS,1-1/3"UHV FLANGE TO QF25 FLANGE

(please log in)

F0133XQF25

$65.00

DN35CF-DN40CF (2.75" OD)

3/4

KF16

1.79

ADAPTER,SS,2-3/4"UHV FLANGE TO QF16 FLANGE

(please log in)

F0275XQF16

$69.45

DN35CF-DN40CF (2.75" OD)

KF25

1.79

ADAPTER,SS,2-3/4"UHV FLANGE TO QF25 FLANGE

(please log in)

F0275XQF25

$81.00

DN35CF-DN40CF (2.75" OD)

1-1/2

KF40

1.79

ADAPTER,SS,2-3/4"UHV FLANGE TO QF40 FLANGE

(please log in)

F0275XQF40

$105.65

DN35CF-DN40CF (2.75" OD)

1-3/4

KF40

2.19

ADAPTER,SS,2-3/4"UHV FLANGE TO QF40 FLANGE, 1.62” ID

(please log in)

F0275XQF40LB

$95.00

DN50CF (3.38" OD)

1-1/2

KF40

1.8

ADAPTER,SS,3-3/8"UHV FLANGE TO QF40 FLANGE

(please log in)

F0337XQF40

$117.10

DN63CF (4.50" OD)

1-1/2

KF40

1.95

ADAPTER,SS,4-1/2"UHV FLANGE TO QF40 FLANGE

(please log in)

F0450XQF40

$165.75

DN63CF (4.50" OD)

KF50

1.95

ADAPTER,SS,4-1/2"UHV FLANGE TO QF50 FLANGE

(please log in)

F0450XQF50

$153.35

DN16CF (1.33" OD)

3/4

KF40

1.62

ADAPTER NIPPLE,SS,1-1/3"UHV TO QF40,"A"-1.62"OAL

(please log in)

F0133XQF40

$67.00

DN16CF (1.33" OD)

3/4

KF50

1.62

ADAPTER NIPPLE,SS,1-1/3"UHV TO QF50,A=1.62"

(please log in)

F0133XQF50

$82.00

DN35CF-DN40CF (2.75" OD)

1-1/2

KF50

1.79

ADAPTER,SS,2-3/4"UHV FLANGE TO QF50 FLANGE

(please log in)

F0275XQF50

$145.00

DN63CF (4.50" OD)

KF25

1.95

ADAPTER,SS,4-1/2"UHV FLANGE TO QF25 FLANGE

(please log in)

F0450XQF25

$265.00

DN100CF (6.00" OD)

3/4

KF16

1.95

ADAPTER,SS,6"UHV FLANGE TO QF16 FLANGE

(please log in)

F0600XQF16

P.O.R.

DN100CF (6.00" OD)

KF25

2.01

ADAPTER,SS,6"UHV FLANGE TO QF25 FLANGE

(please log in)

F0600XQF25

$340.00

DN100CF (6.00" OD)

1-1/2

KF40

2.02

ADAPTER,SS,6"UHV FLANGE TO QF40 FLANGE

(please log in)

F0600XQF40

$320.00

DN100CF (6.00" OD)

1-1/2

KF50

2.02

ADAPTER,SS,6"UHV FLANGE TO QF50 FLANGE

(please log in)

F0600XQF50

$645.00

DN160CF (8.00" OD)

KF25

2.08

ADAPTER,SS,8"OD FXD UHV TO QF25 FLANGE

(please log in)

F0800XQF25

$425.00

DN160CF (8.00" OD)

1-1/2

KF40

2.08

ADAPTER,SS,8"OD FXD UHV TO QF40

(please log in)

F0800XQF40

$450.00

DN160CF (8.00" OD)

KF50

2.08

ADAPTER,SS,8"OD FXD UHV TO QF50 FLANGE

(please log in)

F0800XQF50

$475.00

Flange Size/OD

Drawing

Nominal Tube OD

Flange Adapter

Dim A

Description

VacuCAD^SM

Part Number

Price

In Stock

Add To Cart

Flange Size/OD

Drawing

Nominal Tube OD

Flange Adapter

Dim A

Description

VacuCAD^SM

Part Number

Price

In Stock

Add To Cart

DN16CF (33.78 mm OD)

19.1

KF16

44.5

ADAPTER,SS,1.33"UHV FLANGE TO QF16 FLANGE

(please log in)

F0133XQF16

$65.30

DN16CF (33.78 mm OD)

19.1

KF25

41.1

ADAPTER,SS,1-1/3"UHV FLANGE TO QF25 FLANGE

(please log in)

F0133XQF25

$65.00

DN35CF-DN40CF (69.85 mm OD)

19.1

KF16

45.5

ADAPTER,SS,2-3/4"UHV FLANGE TO QF16 FLANGE

(please log in)

F0275XQF16

$69.45

DN35CF-DN40CF (69.85 mm OD)

25.4

KF25

45.5

ADAPTER,SS,2-3/4"UHV FLANGE TO QF25 FLANGE

(please log in)

F0275XQF25

$81.00

DN35CF-DN40CF (69.85 mm OD)

38.1

KF40

45.5

ADAPTER,SS,2-3/4"UHV FLANGE TO QF40 FLANGE

(please log in)

F0275XQF40

$105.65

DN35CF-DN40CF (69.85 mm OD)

44.5

KF40

55.6

ADAPTER,SS,2-3/4"UHV FLANGE TO QF40 FLANGE, 1.62” ID

(please log in)

F0275XQF40LB

$95.00

DN50CF (85.73 mm OD)

38.1

KF40

45.7

ADAPTER,SS,3-3/8"UHV FLANGE TO QF40 FLANGE

(please log in)

F0337XQF40

$117.10

DN63CF (114.30 mm OD)

38.1

KF40

49.5

ADAPTER,SS,4-1/2"UHV FLANGE TO QF40 FLANGE

(please log in)

F0450XQF40

$165.75

DN63CF (114.30 mm OD)

50.8

KF50

49.5

ADAPTER,SS,4-1/2"UHV FLANGE TO QF50 FLANGE

(please log in)

F0450XQF50

$153.35

DN16CF (33.78 mm OD)

19.1

KF40

41.1

ADAPTER NIPPLE,SS,1-1/3"UHV TO QF40,"A"-1.62"OAL

(please log in)

F0133XQF40

$67.00

DN16CF (33.78 mm OD)

19.2

KF50

41.1

ADAPTER NIPPLE,SS,1-1/3"UHV TO QF50,A=1.62"

(please log in)

F0133XQF50

$82.00

DN35CF-DN40CF (69.85 mm OD)

38.1

KF50

45.5

ADAPTER,SS,2-3/4"UHV FLANGE TO QF50 FLANGE

(please log in)

F0275XQF50

$145.00

DN63CF (114.30 mm OD)

25.4

KF25

49.5

ADAPTER,SS,4-1/2"UHV FLANGE TO QF25 FLANGE

(please log in)

F0450XQF25

$265.00

DN100CF (152.40 mm OD)

19.1

KF16

49.5

ADAPTER,SS,6"UHV FLANGE TO QF16 FLANGE

(please log in)

F0600XQF16

P.O.R.

DN100CF (152.40 mm OD)

25.4

KF25

51.1

ADAPTER,SS,6"UHV FLANGE TO QF25 FLANGE

(please log in)

F0600XQF25

$340.00

DN100CF (152.40 mm OD)

38.1

KF40

51.3

ADAPTER,SS,6"UHV FLANGE TO QF40 FLANGE

(please log in)

F0600XQF40

$320.00

DN100CF (152.40 mm OD)

38.1

KF50

51.3

ADAPTER,SS,6"UHV FLANGE TO QF50 FLANGE

(please log in)

F0600XQF50

$645.00

DN160CF (203.20 mm OD)

25.4

KF25

51.3

ADAPTER,SS,8"OD FXD UHV TO QF25 FLANGE

(please log in)

F0800XQF25

$425.00

DN160CF (203.20 mm OD)

38.1

KF40

52.8

ADAPTER,SS,8"OD FXD UHV TO QF40

(please log in)

F0800XQF40

$450.00

DN160CF (203.20 mm OD)

50.8

KF50

52.8

ADAPTER,SS,8"OD FXD UHV TO QF50 FLANGE

(please log in)

F0800XQF50

$475.00

Flange Selection Guide

With a variety of flanges to choose from, the Flange Selection Guide is designed to help you find one to meet your vacuum requirements. Shop Now!
Can't find the flange you need or want a custom configuration? Please call us at +1 800 245 1656 or email salesus@lesker.com with your inquiry.

Accessories Table

Description

For

Per Package

Note

VacuCAD^SM

Part Number

Price

In Stock

Add Item

Description

For

Per Package

Note

VacuCAD^SM

Part Number

Price

In Stock

Add Item

Hex Bolt, Nut & Washer Set, Stainless Steel, (25) 1/4-28 x 1.38" Long Hex Bolts, (25) Hex Nuts, & (50) Flat Washers

All 2-1/8" (DN25CF) Flanges

—

(please log in)

HBS25028138

$30.50

Thread Lubricant, 4 Ounce Tube

All CF Flanges

—

N/A

VZTL-4OZ

$47.00

Gasket Removal Tool, For All Conflat (CF) Flange Sizes

All CF Flanges

—

N/A

VZGRT

$38.50

Gasket, Copper, DN16CF (1.33" OD) Flange , 0.837" OD, 0.640" ID, (10) Per Package

All 1-1/3" (DN16CF) Flanges

—

(please log in)

GA-0133

$26.35

Gasket, Copper, DN25 (2.125" OD) Flange, 1.291" OD, 1.010" ID, (10) Per Package

All 2-1/8" (DN25CF) Flanges

—

(please log in)

GA-0212

$29.05

Gasket, Copper, DN35CF-DN40CF (2.75" OD) Flange, 1.895" OD, 1.451" ID, (10) Per Package

All 2-3/4" (DN35-DN40CF) Flanges

—

(please log in)

GA-0275

$34.40

Gasket, Copper, DN50CF (3.375" OD) Flange, 2.425" OD, 2.010" ID, (10) Per Package

All 3-3/8" (DN50CF) Flanges

—

(please log in)

GA-0337

$37.15

Gasket, Copper, DN63CF (4.50" OD) Flange, 3.243" OD, 2.506" ID, (10) Per Package

All 4-1/2" (DN63CF) Flanges

—

(please log in)

GA-0450

$58.90

Gasket, Copper, DN75CF (4.625" OD) Flange, 3.598" OD x 3.010" ID, (10) Per Package

All 4-5/8" (DN75CF) Flanges

—

(please log in)

GA-0462

$60.85

Gasket, Copper, DN100CF (6.00" OD) Flange, 4.743" OD,4.006" ID, (10) Per Package

All 6" (DN100CF) Flanges

—

(please log in)

GA-0600

$75.80

Gasket, Copper, DN125CF (6.75" OD) Flange, 5.567" OD x 5.010" ID, (10) Per Package

All 6-3/4" (DN125CF) Flanges

—

(please log in)

GA-0675

$93.50

Gasket, Copper, DN160CF (8.00" OD) Flange, 6.743" OD, 6.007" ID, (10) Per Package

All 8" (DN160CF) Flanges

—

(please log in)

GA-0800

$105.30

Gasket, Copper, DN200CF (10.00" OD) Flange, 8.743" OD, 8.007" ID, (10) Per Package

All 10" (DN200CF) Flanges

—

(please log in)

GA-1000

$131.30

Gasket, Copper, DN275CF (13.25" OD) Flange, 11.590" OD, 10.845" ID, (1) Per Package

All 13-1/4" CF Flanges

—

(please log in)

GA-1325

$69.45

Socket Head Cap Screw & Nut Set, Stainless Steel, DN16CF (1.33" OD) Flange, (25) 8-32 x 0.75" Long Socket Head Cap Screws & (25) Hex Nuts

All 1-1/3" (DN16CF) Flanges

N/A

SBS832075S4-25

$40.00

Hex Bolt, Nut & Washer Set, Stainless Steel, (25) 1/4-28 x 1.38" Long Hex Bolts, (25) Hex Nuts, & (50) Flat Washers

All 2-3/4" (DN35-DN40CF) Flanges

—

(please log in)

HBS25028138

$30.50

Hex Bolt, Nut & Washer Set, Stainless Steel, (25) 5/16-24 x 1.75" Long Hex Bolts, (25) Hex Nuts, & (50) Flat Washers

All 3-3/8" (DN50CF) Flanges

—

(please log in)

HBS31224175

$39.20

Hex Bolt, Nut & Washer Set, Stainless Steel, (25) 5/16-24 x 2.00" Long Hex Bolts, (25) Hex Nuts, & (50) Flat Washers

All 4-1/2" (DN63CF) Flanges

—

(please log in)

HBS31224200

$33.20

Hex Bolt, Nut & Washer Set, Stainless Steel, (25) 5/16-24 x 2.00" Long Hex Bolts, (25) Hex Nuts, & (50) Flat Washers

All 4-5/8" (DN75CF) Flanges

—

(please log in)

HBS31224200

$33.20

Hex Bolt, Nut & Washer Set, Stainless Steel, (25) 5/16-24 x 2.25" Hex Bolts, (25) Hex Nuts, & (50) Flat Washers

All 6" (DN100CF) Flanges

—

(please log in)

HBS31224225

$39.20

Hex Bolt, Nut & Washer Set, Stainless Steel, (25) 5/16-24 x 2.25" Hex Bolts, (25) Hex Nuts, & (50) Flat Washers

All 6-3/4" (DN125CF) Flanges

—

(please log in)

HBS31224225

$39.20

Hex Bolt, Nut & Washer Set, Stainless Steel, (25) 5/16-24 x 2.25" Hex Bolts, (25) Hex Nuts, & (50) Flat Washers

All 8" (DN160CF) Flanges

—

(please log in)

HBS31224225

$39.20

Hex,bolt, Nut & Washer Set, Stainless Steel, (25) 5/16-24 x 2.50" Hex Bolts, (25) Hex Nuts, & (50) Flat Washers

All 10" (DN200CF) Flanges

—

(please log in)

HBS31224250

$30.05

Hex Bolt, Nut & Washer Set, Stainless Steel, (30) 3/8-24 x 3.00" Hex Bolts, (30) Hex Nuts, & (60) Flat Washers

All 13-1/4" CF Flanges

—

N/A

HBS37524300

$65.00

Cast Clamps (SS)

KF10, KF16 Flanges

—

(please log in)

QF16-075-CS

$62.25

Cast Clamps (SS)

KF25 Flanges

—

(please log in)

QF25-100-CS

$68.85

Cast Clamps (SS)

KF40 Flanges

—

(please log in)

QF40-150-CS

$75.00

Cast Clamps (SS)

KF50 Flanges

—

(please log in)

QF50-200-CS

$90.00

Lever Clamps (Aluminum)

KF10, KF16 Flanges

—

N/A

QF16-075-CHA

$52.85

Lever Clamps (Aluminum)

KF25 Flanges

—

N/A

QF25-100-CHA

$75.00

Lever Clamps (Aluminum)

KF40 Flanges

—

N/A

QF40-150-CHA

$87.65