
Vacuum Accessories
KF Ultra-High Vacuum Observation Window 304 Stainless Steel Flange High Borosilicate Glass Sight Glass
Item Number : KT-VA04
Price varies based on specs and customizations
- High borosilicate glass thickness
- 1~5mm
- Working temperature
- -200℃ ~ +300℃

Shipping:
Contact us to get shipping details Enjoy On-time Dispatch Guarantee.
Product Application
The KF ultra-high vacuum observation window is an essential component for environments requiring precise observation and control in ultra-high vacuum conditions, typically above 10^-9 Torr. This product is widely used in various high-tech industries and scientific research fields, including:
- Semiconductor Manufacturing: Ensures clear observation and precise control during the fabrication of semiconductor devices.
- Vacuum Coating: Facilitates the monitoring of coating processes in vacuum environments.
- Optical Instruments: Supports the development and maintenance of optical devices requiring ultra-high vacuum conditions.
- Aerospace: Used in aerospace research and development for observing processes in vacuum chambers.
- Scientific Research Experiments: Provides reliable observation for various scientific experiments conducted in ultra-high vacuum environments.
Product Feature
Material Excellence
-
High Borosilicate Glass:
- Low Expansion Coefficient: 3.3 x 10^-6/K ensures minimal distortion under temperature changes.
- Thermal Stability: Operates effectively in a wide temperature range of -200℃ to +300℃.
- Chemical Stability: Resistant to acid and alkali corrosion, ensuring long service life.
- Light Transmittance: Over 92% light transmittance allows for clear observation of the vacuum chamber's interior.
-
304 Stainless Steel Flange:
- High Strength: Made from high-quality stainless steel, providing durability and resistance to corrosion.
- Excellent Sealing: Ensures a stable and reliable vacuum environment by maintaining superior sealing performance.
Detail & Parts
Working Principle
The KF ultra-high vacuum observation window operates by integrating high borosilicate glass with a 304 stainless steel flange. The glass provides a clear view into the vacuum chamber, while the flange ensures a robust and sealed connection. This combination allows for continuous observation and monitoring of processes within the ultra-high vacuum environment without compromising the integrity of the vacuum.
Key Components
- High Borosilicate Glass: Acts as the observation medium, transmitting light with minimal distortion and resisting thermal and chemical stresses.
- Stainless Steel Flange: Serves as the structural and sealing element, maintaining the vacuum integrity and supporting the glass securely.
Functionality
- Observation: The high borosilicate glass allows for clear observation of the vacuum chamber's interior, crucial for monitoring and control.
- Sealing: The stainless steel flange ensures a tight seal, preventing any air leakage and maintaining the ultra-high vacuum environment.
- Durability: Both materials are chosen for their durability and resistance to the harsh conditions of ultra-high vacuum environments.
Product Advantage
Reliability in Ultra-High Vacuum
- Stable Operation: The combination of high borosilicate glass and stainless steel flanges ensures reliable performance in ultra-high vacuum conditions, crucial for sensitive applications.
- Clear Observation: High light transmittance of the borosilicate glass allows for precise observation and control of processes within the vacuum chamber.
Customization and Ease of Use
- Multiple Specifications: Offers a range of flange sizes and glass thicknesses to meet diverse application requirements.
- Easy Installation: Designed to comply with the KF standard, making installation quick and straightforward, and facilitating easy maintenance.
Long-Term Performance
- Durability: Both materials are chosen for their long service life and resistance to thermal and chemical stresses, ensuring consistent performance over time.
- Maintenance-Friendly: The KF standard design allows for easy replacement and maintenance, reducing downtime and operational costs.
This KF ultra-high vacuum observation window is designed to meet the stringent demands of high-tech industries and scientific research, providing clear, reliable, and durable observation in ultra-high vacuum environments.
Technical specifications
Model | Outer diameter | Inner diameter (view diameter) | Maximum temperature | Thickness | Material |
---|---|---|---|---|---|
KF 25 | 40mm | 23mm | 350℃ | 15.5mm | 304 stainless steel + Borosilicate |
KF 40 | 55mm | 20mm | 15.5mm | ||
KF 50 | 75mm | 34mm | 16mm |
4.7
out of
5
Outstanding clarity and durability. Perfect for our semiconductor research needs.
4.8
out of
5
Exceptional quality and value. The glass is incredibly clear even in low light conditions.
4.9
out of
5
Fast delivery and excellent customer service. The product exceeded our expectations.
4.7
out of
5
Highly durable and reliable. Ideal for our vacuum coating processes.
4.8
out of
5
Clear observation and easy installation. A must-have for our optical instrument development.
4.9
out of
5
Top-notch quality and perfect for aerospace research. The glass is incredibly strong and clear.
4.7
out of
5
Great value for money. The stainless steel flange is robust and ensures a tight seal.
4.8
out of
5
Excellent product for scientific experiments. The glass provides a perfect view of our processes.
4.9
out of
5
Superb clarity and durability. The product is a game-changer for our semiconductor manufacturing.
4.7
out of
5
Reliable and easy to install. The glass is incredibly clear and resistant to thermal stress.
4.8
out of
5
High-quality product with excellent light transmittance. Perfect for our vacuum coating needs.
4.9
out of
5
Outstanding performance in ultra-high vacuum conditions. The glass is incredibly clear and durable.
PDF - KF Ultra-High Vacuum Observation Window 304 Stainless Steel Flange High Borosilicate Glass Sight Glass
disabled = false, 3000)"> DownloadCatalog of Vacuum Accessories
disabled = false, 3000)"> DownloadREQUEST A QUOTE
Our professional team will reply to you within one business day. Please feel free to contact us!
Related Products

KF ISO Stainless Steel Vacuum Flange Blind Plate for High Vacuum Systems
Discover KF/ISO stainless steel vacuum flange blind plates, ideal for high vacuum systems in semiconductor, photovoltaic, and research labs. High-quality materials, efficient sealing, and easy installation.<|end▁of▁sentence|>

CF Ultra-High Vacuum Observation Window Window Flange High Borosilicate Glass Sight Glass
Discover CF ultra-high vacuum observation window flanges with high borosilicate glass, perfect for semiconductor manufacturing, vacuum coating, and optical instruments. Clear observation, durable design, easy installation.

Discover high-quality vacuum bellows for stable vacuum in high-performance systems. Made from 304 and 316 stainless steel, these bellows ensure efficient connections and excellent sealing. Ideal for

High Temperature Resistant High Borosilicate Glass Stirring Rod Flow Diversion Laboratory Glass Rod
Used in chemical experiments, a glassy thin and long rod-shaped simple stirrer, also known as a glass rod.

CF Ultra-High Vacuum Observation Window Stainless Steel Flange Sapphire Glass Sight Glass
Discover CF ultra-high vacuum observation windows with sapphire glass and stainless steel flanges. Ideal for semiconductor manufacturing, vacuum coating, and more. Clear observation, precise control.

Optical Window Glass Substrate Wafer Barium Fluoride BaF2 Substrate Window
BaF2 is the fastest scintillator, sought-after for its exceptional properties. Its windows and plates are valuable for VUV and infrared spectroscopy.

KF Ultra-High Vacuum Observation Window Stainless Steel Flange Sapphire Glass Sight Glass
Discover the KF Ultra-High Vacuum Observation Window, featuring sapphire glass and stainless steel flange for clear, reliable observation in ultra-high vacuum environments. Ideal for semiconductor, vacuum coating, and scientific research applications

MgF2 Magnesium Fluoride Crystal Substrate Window for Optical Applications
Magnesium fluoride (MgF2) is a tetragonal crystal that exhibits anisotropy, making it imperative to treat it as a single crystal when engaging in precision imaging and signal transmission.

CF KF Flange Vacuum Electrode Feedthrough Lead Sealing Assembly for Vacuum Systems
Discover high-vacuum CF/KF flange electrode feedthroughs, ideal for vacuum systems. Superior sealing, excellent conductivity, and customizable options.

Optical Window Glass Substrate Wafer Sheets Zinc Sulfide ZnS Window
Optics Zinc Sulphide (ZnS) Windows have an excellent IR transmission range between 8-14 microns.Excellent mechanical strength and chemical inertness for harsh environments (harder than ZnSe Windows)

KF/ISO/CF Ultra-High Vacuum Stainless Steel Flange Pipe/Straight Pipe/Tee/Cross
Discover KF/ISO/CF ultra-high vacuum stainless steel flange pipe systems, engineered for advanced applications. Ideal for laboratory, industrial, semiconductor, aerospace, and research needs.

304 316 Stainless Steel Vacuum Ball Valve Stop Valve for High Vacuum Systems
Discover 304/316 stainless steel vacuum ball valves, Ideal for high vacuum systems, Ensure precise control and durability. Explore now!

Optical Window Glass Substrate Wafer Quartz Plate JGS1 JGS2 JGS3
The quartz plate is a transparent, durable, and versatile component widely used in various industries. Made from high-purity quartz crystal, it exhibits excellent thermal and chemical resistance.

Infrared Transmission Coating Sapphire Sheet Substrate Window
Crafted from sapphire, the substrate boasts unparalleled chemical, optical, and physical properties. Its remarkable resistance to thermal shocks, high temperatures, sand erosion, and water sets it apart.

Optical Window Glass Substrate Wafer Single Double Sided Coated K9 Quartz Sheet
K9 glass, also known as K9 crystal, is a type of optical borosilicate crown glass renowned for its exceptional optical properties.

Stainless Steel Quick Release Vacuum Chain Three-Section Clamp
Discover our stainless steel quick release clamp vacuum clamp, Ideal for high vacuum applications, Strong connections, reliable sealing, Easy installation, and durable design.
Related Articles

Application of Vacuum Coating on Architectural Glass
An in-depth look at the methods and benefits of vacuum coating on architectural glass, focusing on energy efficiency, aesthetics, and durability.

Factors in Selecting Large Optical Windows
Considerations for choosing large optical windows, including material, polishing, and coating.

Advancements in Diamond Optical Window-Related Components
Explores the development and applications of diamond optical window components in various fields, including defense, aerospace, and energy.

Optical Window Sheet Selection Guide
A comprehensive guide on selecting optical window sheets based on substrate material, optical and mechanical precision, and coating options.

Optical Components: Window Sheets and Their Applications
An overview of various types of optical window sheets, their materials, precision, and coating options.

Comprehensive Guide to Optical Windows: Material Properties and Surface Specifications
This article delves into the properties and specifications of optical windows, focusing on material properties, surface quality, and anti-reflection coatings.

Understanding Fused Silica: Properties, Applications, and Advantages
An in-depth look at fused silica, its unique properties, and its diverse applications in various industries.

Key Properties and Differences Between Fused Silica and Natural Quartz
A detailed comparison of the properties, appearance, physical, chemical, and application differences between fused silica and natural quartz.

Importance of Vacuum Leak Detection in Vacuum Atmosphere Furnaces
Explains the necessity of vacuum leak detection in vacuum atmosphere furnaces and the methods used for such detection.

Common Optical Materials and Their Properties
An overview of various optical materials, their properties, and applications across different spectral ranges.

Understanding the Functionality of Cryogenic Cold Traps
An in-depth look at how cryogenic cold traps operate and their applications in various fields.

Common Faults and Treatment Programs for Vacuum Furnaces
A guide to identifying and resolving common issues with vacuum furnaces, including electrical and mechanical failures.