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KF Flanged Kodial Glass Viewports

KF Flanged Kodial Glass Viewports for High Vacuum Optical Access

KF Flanged Kodial Glass Viewports from TFM are precision-engineered components designed to provide optical clarity, thermal stability, and mechanical durability for use in high-vacuum (HV) systems. These viewports allow for essential visual inspection, wavelength-specific reactions, and process monitoring, making them indispensable for advanced industrial and scientific setups.

Each viewport features a robust assembly of 304 stainless steel, Kovar®, and Kodial 7056 borosilicate glass, ensuring long-term performance in vacuum environments. The Kodial glass disc is fully annealed, providing optical distortion-free viewing across the visible spectrum while withstanding both thermal cycling and chemical exposure.

The viewport design incorporates a KF (QF) flange, compatible with standard quick flange vacuum fittings, allowing quick and secure integration into vacuum lines or chamber ports. Sealing is accomplished via fluorocarbon (FKM) o-rings, which are ideal for high-vacuum environments and support bake-out procedures up to 200°C.

Key Features of KF Flanged Kodial Glass Viewports:

  • High-Transparency Kodial Glass: Offers excellent visibility and durability in demanding environments.

  • Vacuum-Compatible Sealing: Equipped with fluorocarbon o-rings, suitable for high-vacuum conditions and elevated temperatures.

  • Durable Construction: Manufactured with 304 stainless steel and Kovar transitions to maintain mechanical integrity during thermal cycling.

  • Quick Installation: The KF flanged design enables fast integration and removal using standard clamp hardware.

  • Thermal Resilience: Bakeable up to 200°C, suitable for process systems requiring regular maintenance or cleaning.

Applications:

  • Monitoring deposition or etching processes in real time

  • Optical access for UV or IR-based diagnostics

  • Emission spectroscopy or plasma light analysis

  • Ellipsometry and laser-based inspection

  • Integration in OEM vacuum tools or lab research systems

TFM’s KF Flanged Kodial Glass Viewports combine practical design and reliable performance, offering an efficient solution for those needing optical transparency and vacuum integrity in compact, quick-connect formats.

Charts

Ordering Table

Drawing Flange / Mounting Window Material View Area Window Thickness Flange Material Sleeve Material PartNumber
Tooltip KF16 (1.18" OD) Kodial 0.63 0.060 304L SS Kovar QF16-075-VP
Tooltip KF25 (1.57" OD) Kodial 0.63 0.060 304L SS Kovar QF25-100-VP
Tooltip KF40 (2.16" OD) Kodial 1.26 0.120 304L SS Kovar QF40-150-VP
Tooltip KF50 (2.95" OD) Kodial 1.26 0.120 304L SS Kovar QF50-200-VP

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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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