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Flanges & Components > Viewports & Shutters > KF Flanged Viewports

KF Flanged Quartz Viewports

KF Flanged Optical Glass Viewports Features:

  • Built from the highest-quality materials to UHV standards
  • Compatible with vacuum systems capable of reaching High Vacuum levels

UV Quartz Features:

  • Leak Rate <2x10-10 atm cc/sec He
  • Parallelism <30 Arc Minutes
  • 304L Stainless Steel Flange
  • Temperature Range -100°C to 200°C
  • Surface Finish 40/20
  • Corning HPFS 7980 Fused Silica
  • Homogeneity Grade F
  • Inclusion Class 2
  • Transmission >90% @ 250nm (external)

DUV Quartz Features:

  • Leak Rate <2x10-10 atm cc/sec He
  • Parallelism <10 Arc Seconds
  • 304L Stainless Steel Flange
  • λ/4 @ 632nm Transmitted Wavefront
  • Temperature Range -100°C to 200°C
  • Surface Finish 20/10
  • Corning HPFS 7980 Fused Silica
  • Homogeneity Grade A
  • Inclusion Class 0
  • Transmission ≥99.8% @ 248nm (internal)

NOTE: ** O-ring seals normally cannot handle temperatures as high as the viewport itself **

CAUTION: For safety, we strongly recommend that no viewport is exposed to a temperature ramp of greater than 2-3°C per minute, and that no viewport be exposed to direct thermal radiation. To limit thermal gradients when heating viewports, we recommend the viewing area and the flange be covered with many layers of aluminum foil to act as a reflective shield.

Viewport Cleaning Procedure Guide For a guide on Viewport Cleaning Procedures, please click here.


Dimensional Drawings

Charts

Got VacuCADSM?
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
Fig. Glass
Type
Dim
A
Dim
B
View
Area
PartNo Price Add Item
VacuCADSM
Flange
Size/OD
Fig. Glass
Type
Dim
A
Dim
B
View
Area
PartNo Price Add Item
VacuCADSM
KF25 1 DUV Quartz 1 0.39 0.63
QF25-100-VPDU
$380.00
N/A
KF25 1 UV Quartz 1 0.39 0.63
QF25-100-VPQ
$220.00
N/A
KF40 2 DUV Quartz 1.93 0.54 1.4
QF40-150-VPDU
$380.00
N/A
KF40 2 UV Quartz 1.93 0.54 1.4
QF40-150-VPQ
$220.00
N/A
KF50 3 DUV Quartz 2 0.62 1.4
QF50-200-VPDU
$443.00
N/A
KF50 3 UV Quartz 2 0.62 1.4
QF50-200-VPQ
$270.00
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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
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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
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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
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