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DN Vacuum Viewport
The DN Vacuum Viewport is designed for reliable optical access in vacuum chambers, process vessels, and industrial vacuum systems. Available with borosilicate, fused quartz, sapphire, CaF₂, or BaF₂ windows, it combines dependable vacuum sealing with excellent optical performance for a wide range of industrial and scientific applications.
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Technical data
DN Vacuum Viewport Overview
The DN Vacuum Viewport is engineered to provide clear optical observation while maintaining reliable vacuum integrity in industrial vacuum systems and process equipment. Manufactured with precision DIN flanges and premium stainless steel construction, it offers exceptional durability, dependable sealing performance, and long service life.
To meet different optical and process requirements, the viewport can be supplied with a variety of window materials, including borosilicate glass, fused quartz, sapphire, calcium fluoride (CaF₂), and barium fluoride (BaF₂). Each material is selected according to wavelength transmission, temperature resistance, pressure requirements, and chemical compatibility.
Available in standard DN flange sizes or custom configurations, the DN Vacuum Viewport is widely used in vacuum chambers, semiconductor equipment, vacuum coating systems, chemical reactors, pharmaceutical processing, optical instruments, and scientific research facilities.
DN Vacuum Viewport — Technical Data
| Specification | Details |
|---|---|
| Product Name | DN Vacuum Viewport |
| Flange Standard | DIN (DN) |
| Body Material | SS304, SS304L, SS316, SS316L |
| Window Materials | Borosilicate, Fused Quartz, Sapphire, CaF₂, BaF₂ |
| Standard Sizes | DN40, DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250, DN300 |
| Vacuum Level | Rough Vacuum / High Vacuum |
| Leak Rate | ≤1 × 10⁻⁹ mbar·L/s (Helium Leak Tested) |
| Operating Temperature | Depends on window material |
| Sealing Material | Viton, Silicone, EPDM, PTFE (Optional) |
| Connection Type | DIN Flanged |
| Installation | Horizontal or Vertical |
DN Vacuum Viewport— Drawing
Optical Window Material Selection
| Window Material | Spectral Range | Key Advantages | Typical Applications |
|---|---|---|---|
| Borosilicate | Visible | Cost-effective and durable | General vacuum observation |
| Fused Quartz | UV – NIR | Excellent UV transmission and thermal stability | UV optics, laser systems |
| Sapphire | UV – IR | Outstanding hardness and pressure resistance | High-pressure and precision optical systems |
| CaF₂ | UV – IR | Broad spectral transmission with low absorption | UV optics and spectroscopy |
| BaF₂ | UV – Mid IR | Excellent infrared transmission | FTIR and infrared optical instruments |
Material Performance Comparison
| Property | Borosilicate | Fused Quartz | Sapphire | CaF₂ | BaF₂ |
|---|---|---|---|---|---|
| Visible Transmission | Excellent | Excellent | Excellent | Excellent | Excellent |
| UV Transmission | Good | Excellent | Excellent | Excellent | Very Good |
| Infrared Transmission | Limited | Good | Excellent | Excellent | Excellent |
| Thermal Stability | High | Excellent | Excellent | Good | Good |
| Scratch Resistance | Moderate | Good | Outstanding | Moderate | Moderate |
| Pressure Resistance | Good | High | Excellent | Good | Good |
| Typical Applications | General Vacuum | UV & Laser Systems | High-Pressure & Precision Optics | UV/IR Spectroscopy | FTIR & Infrared Analysis |
KEY FEATURES
Multiple Window Materials
Choose from borosilicate, fused quartz, sapphire, CaF₂, or BaF₂ for different optical applications.
Reliable Vacuum Sealing
Precision DIN flange ensures dependable leak-tight performance.
Excellent Optical Clarity
High-quality optical windows provide clear viewing and efficient light transmission.
Wide Spectral Compatibility
Material options support ultraviolet, visible, near-infrared, and infrared applications.
Corrosion-Resistant Construction
Stainless steel housing offers excellent durability in demanding environments.
Standard & Custom Sizes
Available in standard DIN flange sizes or manufactured to customer specifications.
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 DN vacuum viewport is a DIN flange-mounted optical window that provides visual observation or optical access while maintaining a reliable vacuum seal in industrial vacuum systems.
A:Standard sizes include DN40, DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250, and DN300. Custom dimensions are also available.
A: Our CF vacuum viewports are suitable for high-vacuum (HV) and ultra-high-vacuum (UHV) systems with helium leak rates as low as 1×10⁻¹⁰ mbar·L/s.
A:Yes. We offer customized flange dimensions, window thicknesses, optical materials, coatings, sealing materials, and special vacuum designs according to customer drawings or specifications.
A: DN vacuum viewports are widely used in semiconductor manufacturing, vacuum coating, chemical processing, pharmaceutical production, scientific research, analytical instruments, and industrial vacuum systems.
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