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Flanges & Components > Adapters & Couplings > Flange to Coupling Adapters

KF (QF) to Quick-Connect Couplings

Flange to quick connect coupling adapters allow the mating of one type of flange system to a quick connect coupling. All of our flange to fitting adapters are manufactured from 304 series stainless steel (unless otherwise noted).

Flange to Quick Connect Coupling Adapter Features:

  • Makes a vacuum joint with any smooth-surfaced standard O.D. tube
  • Commonly used to attach tubulated ion or thermocouple gauges to a system
  • Adapters available in either CF or KF flange terminations
  • CF flanged adapters are UHV compatible; dual coupling versions ideal for easy fluid circulation

NOTE: We recommend using a high quality thread lubricant on all stainless steel threads (sold below).

Caution:
Care should be taken not to chip, crack or over tighten the compression fitting on glass neck tubes.

Dimensional Drawings

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Ordering Table

(Click column headers to sort data)

Flange
Size/OD
Nominal
Tube OD
Dim
A
Dim
B
Weight
lbs
PartNo Price Add Item
VacuCADSM
Flange
Size/OD
Nominal
Tube OD
Dim
A
Dim
B
Weight
lbs
PartNo Price Add Item
VacuCADSM
KF10 0.5 0.52 1.5 0.25
QF10XVC050
P.O.R.
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KF16 0.25 0.27 1.4 0.25
QF16XVC025
$60.00
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KF16 0.5 0.52 1.5 0.25
QF16XVC050
$68.00
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KF16 0.75 0.77 1.8 0.25
QF16XVC075
P.O.R.
(please log in)
KF25 0.5 0.52 1.5 0.25
QF25XVC050
$73.00
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KF25 0.63 .64 1.7 0.5
QF25XVC062
$74.00
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KF25 0.75 0.77 1.8 0.5
QF25XVC075
$77.00
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KF25 1 1.02 2 0.5
QF25XVC100
P.O.R.
(please log in)
KF25 1.13 1.14 2 0.5
QF25XVC112
P.O.R.
(please log in)
KF40 0.5 0.52 1.5 0.5
QF40XVC050
$78.00
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KF40 0.75 0.77 1.8 0.5
QF40XVC075
$82.00
(please log in)
KF40 1 1.02 2 0.5
QF40XVC100
$109.00
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KF40 1.13 1.14 2 0.5
QF40XVC112
P.O.R.
(please log in)
KF40 1.25 1.27 2 0.5
QF40XVC125
P.O.R.
(please log in)
KF40 1.38 1.38 2.1 0.5
QF40XVC137
P.O.R.
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KF40 1.5 1.52 2.4 0.5
QF40XVC150
P.O.R.
N/A
KF50 0.5 0.52 1.5 0.5
QF50XVC050
$88.00
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KF50 0.75 0.77 1.8 0.5
QF50XVC075
$94.00
(please log in)
KF50 1 1.02 2 0.5
QF50XVC100
$114.00
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KF50 1.13 1.14 2 0.5
QF50XVC112
$140.00
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KF50 1.5 1.52 2.4 0.75
QF50XVC150
$186.00
(please log in)
KF50 2 2.02 2.4 1
QF50XVC200
P.O.R.
(please log in)
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 1-412-387-9200 or email international@lesker.com with your inquiry.

Accessories Table

Description For Per Package Weight lbs (kg) Manual PartNo Price Add Item
VacuCADSM
Description For Per Package Weight lbs (kg) Manual PartNo Price Add Item
VacuCADSM
Cast Clamps (SS)
KF10, KF16 Flanges
1
3/4 (0.34)
--
QF16-075-CS
$46.00
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Cast Clamps (SS)
KF25 Flanges
1
1 (0.45)
--
QF25-100-CS
$57.00
(please log in)
Cast Clamps (SS)
KF40 Flanges
1
1-1/2 (0.68)
--
QF40-150-CS
$67.00
(please log in)
Cast Clamps (SS)
KF50 Flanges
1
2 (0.91)
--
QF50-200-CS
$79.00
(please log in)
Lever Clamps (Aluminum)
KF10, KF16 Flanges
1
1/2 (0.22)
--
QF16-075-CHA
$33.00
N/A
Lever Clamps (Aluminum)
KF25 Flanges
1
3/4 (0.34)
--
QF25-100-CHA
$46.00
N/A
Lever Clamps (Aluminum)
KF40 Flanges
1
3/4 (0.34)
--
QF40-150-CHA
$54.00
N/A
Centering Ring (SS with Fluorocarbon O-Ring)
KF10 Flanges
1
1/4 (0.11)
--
QF10-050-SRV
$6.40
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Centering Ring (SS with Fluorocarbon O-Ring)
KF16 Flanges
1
1/4 (0.11)
--
QF16-075-SRV
$6.70
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Centering Ring (SS with Fluorocarbon O-Ring)
KF25 Flanges
1
1/4 (0.11)
--
QF25-100-SRV
$8.50
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Centering Ring (SS with Fluorocarbon O-Ring)
KF40 Flanges
1
1/4 (0.11)
--
QF40-150-SRV
$13.00
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Centering Ring (SS with Fluorocarbon O-Ring)
KF50 Flanges
1
1/4 (0.11)
--
QF50-200-SRV
$15.00
(please log in)

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