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ISO Flanged Kodial Glass Viewports

ISO Flanged Kodial Glass Viewports for Clear Observation in Vacuum Systems

ISO Flanged Kodial Glass Viewports from TFM are designed to provide exceptional optical clarity and mechanical reliability for a broad range of industrial and scientific vacuum applications. These zero-length viewports combine the robustness of ISO flanges with the optical performance of Kodial glass, delivering a dependable solution for systems that demand precise visual access under vacuum.

Kodial glass, also known as alkali borosilicate 7056, is chosen for its superior thermal stability, minimal distortion, and excellent transmittance in the visible range. Each optical disc is fully annealed to reduce internal stress and enhance mechanical durability, making these viewports suitable for ellipsometry, emission monitoring, wavelength-dependent experiments, and general process observation.

The lens is permanently joined to the metal flange via a Kovar™ transition ring, ensuring thermal expansion compatibility and structural integrity even during bakeout cycles. The ISO-style flange, mated with fluorocarbon (FKM) o-rings, offers a reliable vacuum seal capable of withstanding temperatures up to 200°C.

Key Features of ISO Flanged Kodial Glass Viewports:

  • Clear, Distortion-Free Viewing: Large aperture with no internal voids, reducing the risk of particulate entrapment or optical distortion.

  • High-Purity Borosilicate Glass: Manufactured from Kodial 7056, offering outstanding clarity, low thermal expansion, and chemical resistance.

  • Stable ISO Flange Integration: Available in ISO-K or ISO-F flange styles for compatibility with clamp or bolt-type systems.

  • Robust Kovar Seal Design: Kovar metal transitions ensure secure bonding between the glass and flange under thermal cycling.

  • Vacuum and Thermal Ratings: Designed for use in high vacuum environments, and bakeable to 200°C with appropriate o-ring selection.

Common Applications:

  • Visual inspection of vacuum chamber interiors

  • Real-time monitoring during deposition, plasma, or etch processes

  • Integration into systems requiring light-based feedback or measurement

  • Use in chemical or photonic research setups

Whether you’re equipping a research facility, building an OEM vacuum system, or retrofitting process chambers, TFM’s ISO Flanged Kodial Glass Viewports provide a dependable and optically superior solution. These viewports are ideal where clarity, durability, and UHV performance are essential.

Charts

Ordering Table

Drawing Flange / Mounting Window Material View Area Window Thickness Flange Material Sleeve Material PartNumber
Tooltip ISO63-K (3.74" OD) Kodial 1.30 0.100 304L SS Kovar VPZL-63
Tooltip ISO80-K (4.33" OD) Kodial 1.30 0.100 304L SS Kovar VPZL-80
Tooltip ISO100-K (5.12" OD) Kodial 2.50 0.120 304L SS Kovar VPZL-100
Tooltip ISO160-K (7.09" OD) Kodial 3.50 0.160 304L SS Kovar VPZL-160
Tooltip ISO200-K (9.45" OD) Kodial 5.32 0.310 304L SS Kovar VPZL-200
Tooltip ISO250-K (11.42" OD) Kodial 5.32 0.310 304L SS Kovar VPZL-250

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FAQ

Tube fittings are designed for tubes (measured by outside diameter and wall thickness) used in high-pressure and instrumentation applications, whereas pipe fittings are for pipes (identified by nominal pipe size) primarily used in fluid transport.

 

Common valve types include ball valves, gate valves, check valves, butterfly valves, and globe valves. Each serves a specific function—from quick shutoff (ball/gate valves) to flow regulation (globe valves).

 

  • For tubing, measure the outside diameter; for pipes, refer to the nominal pipe size (using conversion charts if needed). Always match the valve or fitting size to your pipe’s dimensions and flow requirements.

  • Frequently used thread types include NPT (National Pipe Tapered), BSP (British Standard Pipe), and UNC, along with slip-fit options that rely on compression or fusion rather than threads.

Interchangeability depends on manufacturer specifications and certification. Always verify compatibility via manufacturer guides or certified interchangeability charts.

 

  • A coupling is a short, straight fitting used to join two pipes or tubes. It provides a secure, leak-tight connection and can sometimes serve to extend or repair piping runs.

Consider valve type, pressure and temperature ratings, material compatibility with your fluid, actuation method (manual or automatic), and maintenance requirements.

 

  • Valves regulate flow by opening, closing, or partially obstructing the pathway. Their mechanisms (such as the rotation of a ball or the linear movement of a gate) determine the speed and precision of flow control.

  • A flange is a flat, circular component used to connect pipes, valves, or other equipment. Bolted together with gaskets, flanges provide a secure, leak-proof joint that facilitates both assembly and maintenance.

  • Manual valves require physical operation via handles or levers, whereas actuated valves use mechanisms—pneumatic, electric, or hydraulic—to open and close automatically or remotely.

  • Issues include leaks caused by improper installation, over-tightening, degraded seals, material incompatibility, and fatigue from repeated cycling. Regular inspection and proper installation practices help mitigate these problems.

Regular maintenance involves periodic inspections, cleaning or replacing worn seals, ensuring proper torque during installation, and adhering to manufacturer guidelines and local plumbing codes to preserve system integrity.

 

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