CF Vacuum Viewports (Kodial Glass Viewports）

Vacuum viewports are critical components that connect ultra-high vacuum (UHV) environments to the outside atmosphere or other vacuum zones. They allow the transmission of light signals — including UV, visible, infrared, and X-ray — while maintaining the vacuum integrity of the system.

High Vacuum (HV): Sealed with O-ring compression.

Ultra-High Vacuum (UHV): Joined by vacuum brazing for maximum hermeticity.

Most viewports are designed as zero-length viewports, where the glass surface does not protrude beyond the flange. This protects the window from damage and provides a clear, unobstructed view.

Features

Materials: borosilicate glass, quartz, sapphire.

Copper-gasket alloy brazing available for high-temperature applications

Fully customizable to customer specifications

Key Functions

Vacuum Isolation: Surface analysis instruments operate under UHV (≤10⁻⁷ Pa) to avoid sample contamination. Optical windows isolate the chamber while enabling light transmission.

Special Applications:

Environmental cells: in-situ spectral monitoring for electrochemistry & catalysis

High/low temperature experiments: thermal-shock resistant design

Charged particle applications: conductive coating available to prevent charge buildup

We design and manufacture fully customizable vacuum chambers to match your exact process requirements, with flexible configurations covering a wide range of industrial and lab scenarios:

Material: 304 stainless steel, 316L stainless steel, or customer-specified materials

Operating temperature range: -190°C to +1500°C (water cooling configuration available for high-temperature working conditions)

Sealing method: Fluororubber "O"-ring for general vacuum use, or metal oxygen-free copper gasket for ultra-high vacuum and extreme temperature environments

Quality is verified at every step before delivery, with mandatory factory inspections on every unit:

🔹Vacuum leak rate test

🔹Customizable surface treatments:

Wire drawing and polishing, sandblasting and electrolytic treatment, acid pickling, electrolytic polishing, mirror polishing, and more to fit your application standards

Whether you need a chamber for PVD coating, semiconductor processing, thermal treatment, food freeze-drying, or lab research, we can tailor the design to your footprint, interface, and performance needs.

Kodial Glass Viewports Features: UHV compatibility Large, distortion-free viewing area without interior voids, minimizing trapped volume and particulate Commercial grade optical discs of fully annealed Kodial glass (alkali borosilicate 7056) Kovar metal transition piece between glass and CF flange Bakeout to 350°C (heating rate should not exceed 2-3° per

For further customisation requirements, please email us.