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CF Quartz Vacuum Viewport
The CF Quartz Vacuum Viewport provides exceptional optical transmission and thermal stability for high-vacuum and ultra-high-vacuum systems. Manufactured with a precision stainless steel ConFlat flange and fused quartz window, it is ideal for laser, UV, and high-temperature vacuum applications.
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Technical data
CF Quartz Vacuum Viewport Overview
The CF Quartz Vacuum Viewport is designed for high-performance optical access in high-vacuum (HV) and ultra-high-vacuum (UHV) environments. Manufactured with a precision stainless steel ConFlat (CF) flange and a premium fused quartz window, it delivers outstanding UV transmission, excellent thermal stability, and exceptional optical clarity.
Compared with borosilicate glass, fused quartz offers lower thermal expansion, higher temperature resistance, and superior transmission across ultraviolet, visible, and near-infrared wavelengths. These advantages make it the preferred choice for semiconductor manufacturing, laser processing, vacuum coating, spectroscopy, plasma research, and scientific instrumentation.
Available in standard CF flange sizes or custom configurations, our quartz vacuum viewports provide reliable vacuum sealing and long-term durability for demanding industrial and research applications.c
CF Quartz Vacuum Viewport— Technical Data
| Project Description | Parameters |
|---|---|
| Model | CF16-250 |
| Structure | 304/316 Stainless steel flange+4J34 Kovar alloy+JGS1 Quartz glass+Silver-based alloys |
| Temperature resistance | -196 ℃/+450 ℃ |
| Ultimate vacuum/leakage rate | 1.0*10⁻¹¹ Torr/1.0*10⁻¹¹Pa.m³S⁻¹ |
| Baking (heating/cooling) rate | ≤3 ℃/min |
| Flange surface treatment | Electropolishing |
| Kovar alloy | 4J34 |
| Brazing materials | Silver-based alloys |
| Glass materials | JGS1 Deep ultraviolet quartz glass |
| Glass transmission wavelength (nm) | 185-2800 |
| Transmittance T=% | 190-240nm T≥87% 240-2800nm T≥95% |
| Glass-face PV | PV 1/2–1/20 |
| Glass surface smoothness | 80/50、60/40、20/10 |
| Non-magnetic treatment of metal parts | Demagnetization processing according to customer requirements. |
CF Quartz Vacuum Viewport— Drawing
| Number | Specification | Glass size | glass material | Flange outer diameter | Number of bolt holes * diameter | center distance | Flange thickness |
|---|---|---|---|---|---|---|---|
| No. | Size | Glass | Material | D | N-Φd | Do | H |
| 1 | CF16 | 15.6*5 | Quartz glass | 34 | 6*φ4.3 | 27 | 12 |
| 2 | CF20 | 23.6*5 | Quartz glass | 54 | 6*φ6.6 | 41.3 | 15 |
| 3 | CF25 | 30.6*5 | Quartz glass | 60 | 6*φ6.6 | 47 | 15 |
| 4 | CF40 (CF35) | 40.6*5 | Quartz glass | 70 | 6*φ6.6 | 58.7 | 15 |
| 5 | CF50 | 51.6*5 | Quartz glass | 86 | 8*φ8.4 | 72.4 | 20 |
| 6 | CF63 | 70.6*5 | Quartz glass | 114 | 8*φ8.4 | 92.2 | 20 |
| 7 | CF80 | 85.5*6 | Quartz glass | 130 | 16*φ8.4 | 110 | 20 |
| 8 | CF100 | 92.6*6 | Quartz glass | 152 | 16*φ8.4 | 130.3 | 20 |
| 9 | CF160 | 144.6*8 | Quartz glass | 202 | 20*φ8.4 | 181 | 22 |
| 10 | CF200 | 190.6*10 | Quartz glass | 253 | 24*φ8.4 | 231.8 | 24.5 |
| 11 | CF250 | 246*12 | Quartz glass | 305 | 32*φ8.4 | 284 | 26 |
KEY FEATURES
Excellent UV Transmission
Fused quartz provides outstanding transmission from ultraviolet to near-infrared wavelengths.
Superior Thermal Stability
Low thermal expansion ensures reliable performance during bake-out and thermal cycling.
High Vacuum Compatibility
Designed for HV and UHV systems with dependable vacuum sealing.
Exceptional Optical Clarity
High-purity fused quartz delivers distortion-free optical observation.
Precision CF Flange
Accurate dimensions and polished sealing surfaces
Corrosion-Resistant Construction
Stainless steel housing provides excellent durability in vacuum environments.
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:Quartz provides higher temperature resistance, lower thermal expansion, and significantly better UV transmission than borosilicate glass, making it ideal for demanding optical and vacuum applications.
A:The viewport is designed for both high-vacuum (HV) and ultra-high-vacuum (UHV) systems, with a helium leak rate of ≤1 × 10⁻¹⁰ mbar·L/s.
A:Standard sizes include CF16, CF35, CF63, CF100, CF160, CF200, and CF250. Custom sizes are also available upon request.
A:Quartz offers excellent optical transmission from approximately 180 nm in the ultraviolet through the visible and into the near-infrared, making it suitable for a wide range of optical applications.
A: Yes. We provide customized CF vacuum viewports with different flange sizes, quartz thicknesses, optical finishes, anti-reflective coatings, and sealing configurations according to customer requirements.
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