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KF (QF) to Test Port Adapter


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

Flange to port adapters allow the mating of a KF (QF) flange to a particular type of port or tubulation. All of our flange to port adapters are manufactured from 304 series stainless steel (unless otherwise noted).

Flange to Port Adapter Types:

  • KF to 1" Baseplate Port -- Adapter fits through a 1" diameter hole in a baseplate or chamber wall used for connecting a roughing pump or other KF flanged component to the chamber.
  • KF to Hose Tubulation -- Available in either stainless steel or aluminum, they connect a KF flange to a plastic or rubber vacuum hose
  • KF to Test Port -- KF flange terminating in a tube with an O.D. that fits either a 1-1/8" or 2" O.D. test port
  • KF to Welch Pump Port -- Substitutes for the regular intake hose coupling on the pump. Threads into the pump inlet, enabling direct connection to the foreline by the KF flange.

NOTE: Welch pump port adapters are available in both new style (oil sight glass pressed into pump body) and old style (oil sight glass held in place with a bolt ring) due to pump design changes by the manufacturer. Please pay careful attention when ordering.

Dimensional Drawings

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VacuCAD is a free library containing thousands of 2D CAD drawings (in DXF format) and 3D Models (in STP format) for many of our standard vacuum components and chambers. Please Log in

Ordering Table

(Click column headers to sort data)

Flange
Size/OD
Test Port
OD
Weight
lbs
PartNo Price Add Item
VacuCADSM
Flange
Size/OD
Test Port
OD
Weight
lbs
PartNo Price Add Item
VacuCADSM
KF16 1.13 0.25
QF16-112LD
$62.00
N/A
KF16 2 0.25
QF16-200LD
P.O.R.
N/A
KF25 1.13 0.25
QF25-112LD
$62.00
N/A
KF40 1.13 0.25
QF40-112LD
$65.00
N/A
KF50 1.13 0.5
QF50-112LD
$75.00
N/A
KF50 2 0.5
QF50-200LD
P.O.R.
N/A
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
(please log in)
Cast Clamps (SS)
KF25 Flanges
1
1 (0.45)
--
QF25-100-CS
$57.00
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Cast Clamps (SS)
KF40 Flanges
1
1-1/2 (0.68)
--
QF40-150-CS
$67.00
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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
(please log in)
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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