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KF Vacuum Viewport
The KF Vacuum Viewport provides reliable optical access for high-vacuum systems using standard KF flange connections. Available with borosilicate glass, fused quartz, sapphire, CaF₂, or BaF₂ windows, it offers excellent optical performance for vacuum chambers, laser systems, spectroscopy, and scientific research.
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Technical data
KF Vacuum Viewport Overview
The KF Vacuum Viewport is designed to provide dependable optical access for high-vacuum systems while maintaining reliable vacuum integrity. Manufactured with a precision stainless steel KF flange and a selection of premium optical window materials, it offers excellent optical transmission, mechanical stability, and long-term performance.
Compatible with standard KF (NW) vacuum fittings, this viewport enables clear visual inspection, laser transmission, spectroscopy, and optical diagnostics without compromising vacuum performance. Multiple window materials are available to meet different wavelength, temperature, pressure, and chemical compatibility requirements.
Suitable for laboratory research, semiconductor manufacturing, vacuum coating, laser processing, analytical instruments, and industrial vacuum equipment, the KF vacuum viewport combines easy installation with excellent sealing performance.
KF Vacuum Viewport — Technical Data
| Specification | Details |
|---|---|
| Product Name | KF Vacuum Viewport |
| Flange Type | KF Standard |
| Body Material | SS304L / SS316L Stainless Steel |
| Window Materials | Borosilicate, Fused Quartz, Sapphire, CaF₂, BaF₂ |
| Standard Sizes | KF16, KF25, KF40, KF50, KF63, KF80 |
| Vacuum Level | Rough Vacuum / High Vacuum |
| Leak Rate | ≤1 × 10⁻⁹ mbar·L/s (Helium Tested) |
| Operating Temperature | Depending on window material |
| Sealing Method | Centering Ring with O-Ring |
| O-Ring Material | Viton, Silicone, EPDM (Optional) |
| Installation | Vacuum Chambers, Optical Systems, Laboratory Equipment |
Optical Window Material Selection
| Window Material | Spectral Range | Main Advantages | Typical Applications |
|---|---|---|---|
| Borosilicate | Visible | Cost-effective, excellent clarity | General vacuum observation |
| Fused Quartz | UV – NIR | Excellent UV transmission, thermal stability | UV optics, lasers |
| Sapphire | UV – IR | High hardness, pressure resistance | High-pressure and laser systems |
| CaF₂ | UV – IR | Wide spectral transmission, low absorption | UV optics, spectroscopy |
| BaF₂ | UV – Mid IR | Excellent infrared transmission | FTIR, infrared optical systems |
KF Vacuum Viewport— Drawing
Material Comparison
KEY FEATURES
Multiple Window Materials:
Available in borosilicate, fused quartz, sapphire, CaF₂, and BaF₂.
Excellent Optical Clarity
High-quality optical windows provide clear observation and efficient light transmission.
Reliable Vacuum Sealing
Precision KF flange ensures dependable leak-tight performance.
Wide Spectral Compatibility
Window materials support applications from ultraviolet to infrared wavelengths.
Corrosion-Resistant Construction
Stainless steel body offers excellent durability in demanding environments.
Quick Installation
Standard KF flange design allows fast assembly and maintenance.
Custom Manufacturing Service
We provide tailor-made solutions according to drawings or technical requirements.
- Custom diameter
- Custom thickness
- Special pressure design
- Edge polishing
- Optical finishing
- OEM / ODM support
- Custom packaging
TYPICAL APPLICATIONS
- Pressure Vessels
- Chemical Reactors
- Boilers & Steam Systems
- Pipeline Sight Glass Assemblies
- Pharmaceutical Equipment
- Food & Beverage Processing
- Industrial Observation Ports
FAQ
A:A KF vacuum viewport is a vacuum viewing window designed with a standard KF (NW) flange, providing optical access while maintaining a reliable vacuum seal in laboratory and industrial vacuum systems.
A:Standard sizes include KF16, KF25, KF40, KF50,KF63,KF80. Other custom sizes are available upon request.
A: Yes. Anti-reflective (AR), infrared, UV-enhanced, and other specialized optical coatings are available depending on the window material and wavelength requirements.
A:Yes. Fused quartz, sapphire, CaF₂, and BaF₂ windows are suitable for many laser and optical applications depending on the operating wavelength.
A: Yes. We also manufacture CF viewports with fused quartz, fused silica, sapphire, ZnSe, CaF₂, BaF₂, MgF₂, and other optical materials for specialized applications.
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