Vacuum Services is pleased to offer a range of Vacuum Viewports.


Vacuum viewports can be supplied in the following formats

  • Conflat Flanged Viewport, CF Flanged Viewport
  • ISO-KF Flanged Viewport
  • ISO K Flanged Viewport
  • ISO-F Flanged viewport
  • Bespoke Flange viewports to Customer requirements

The glass viewports are manufactured using optical quality ‘Corning 7056’ glass which is sealed into a Kovar metal transition piece finally being Tig welded into the stainless steel vacuum flange. Viewing diameters range from 16mm to 135mm.


  • Viewport material Corning 7056 glass Kodial®
  • Standard Flange material is 304L stainless steel,   (316L on request)
  • Spinning material is Kovar
  • Maximum Temperature 400°C
  • 3°C/Minute Maximum Heating Rate
  • 1.487 Refraction Index
  • Cleaned to UHV?standards

The typical turn around for this product 1 – 2 weeks if not in stock

Our New Customers can pay against a Proforma invoice or with a Credit card. After a Customers first order they are offered a credit account or can continue to pay with a credit, debit card or Bank Transfer if they wish. Our standard credit terms are 30 days end of month.


ISO Vacuum Viewports

KF Vacuum Viewports

CF Zero Length Viewports

cf-zero-viewports cf-zero-viewports CF Zero Length Viewports


For further details or to discuss your requirements, please contact us via [email protected] or on 01424 447726

Vacuum Services Ltd

Unit 5, Haywood Way, Hastings, East Sussex, TN35 4PL England

Phone: +44 (0) 1424 447726

Email: [email protected]

Fax: +44 (0) 1424 447736


We have been using Vacuum Services for a number of years for a simple reason, their ability to understand and exceed our expectation time after time..

Dr Stevens, Sussex

Great people, great service, fast delivery, 5 stars!

Tom Bartholomew, Germany


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