2-500mm transparent vacuum quartz flange
The 2-500mm transparent vacuum quartz flange is made of high-purity synthetic quartz material (SiO ₂ content ≥ 99.99%), designed specifically for vacuum systems that require optical observation.
LUVERRE quartz
99.99%
Inner with Vacuum PVC bag and then wrapped with air bubble film, outer with wooden box.
as per customer's requirement
| Availability: | |
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2-500mm transparent vacuum quartz flange
What can quartz flanges solve for you?
Q: I need a transparent connecting component that can maintain stability in high temperature and high vacuum environments. What is the solution?
Answer: Our transparent vacuum quartz flange is designed for harsh environments and can maintain stable performance under ultra-high vacuum of 10 ⁻⁶ Pa and high temperature of 1200 ℃, solving the problems of corrosion, opacity, and mismatched thermal expansion coefficient of traditional metal flanges.
Q: Is it possible for our experimental equipment to observe the internal reaction process while ensuring vacuum sealing?
Answer: It's entirely possible. The transparent nature of quartz flanges allows you to observe internal processes in real-time, while the precisely ground sealing surface ensures vacuum integrity, killing two birds with one stone.
Q: Our project requires non-standard size flanges. Can we customize them?
Answer: Of course. We offer full-size customization of flanges ranging from 2mm micro to 500mm large, meeting the special needs of various fields such as semiconductors, photovoltaics, and scientific research.

The 2-500mm transparent vacuum quartz flange is made of high-purity synthetic quartz material (SiO ₂ content ≥ 99.99%), designed specifically for vacuum systems that require optical observation. The product has undergone precision annealing treatment, with an extremely low coefficient of thermal expansion (5.5 × 10 ⁻⁷/℃), ensuring dimensional stability and vacuum sealing performance under drastic temperature changes.

Key performance parameters
-Size range: 2mm to 500mm inner diameter, supports non-standard customization
-Vacuum performance: up to 10 ⁻⁶ Pa in ultra-high vacuum environment
-Temperature tolerance: Continuous working temperature of 1200 ℃, short-term up to 1450 ℃
-Transmittance characteristics: high transmittance in the ultraviolet to infrared band (170nm-2500nm)
-Surface accuracy: sealing surface flatness ≤ 1 μ m, roughness Ra ≤ 0.4 μ m
-Pressure tolerance: The standard model can withstand pressure cycles from 1 × 10 ⁻ ⊃3; Pa to atmospheric pressure

Detailed explanation of product advantages
1. Material advantages
-Ultra high purity: over 99.99% SiO ₂ content, metal impurity content below 1ppm
-Thermal stability: The coefficient of thermal expansion is only 1/15 of ordinary glass, and the thermal shock resistance is superior
-Chemical inertness: acid resistant (except hydrofluoric acid), alkali resistant, and resistant to most chemical corrosion
-Radiation stability: resistant to radiation yellowing, maintaining transparency for a long time
2. Manufacturing process advantages
-Precision annealing: eliminates internal stress, prevents deformation or cracking during use
-Laser cutting: Ensure smooth and flat edges, reduce microcracks
-Optical polishing: The sealing surface achieves optical grade flatness, ensuring vacuum sealing
-Ultrasonic cleaning: pollution-free assembly, avoiding particle contamination of the vacuum system
3. Functional advantages
-Observation and sealing integrated: solving the complexity of separating traditional observation windows from flanges
-Multi specification compatibility: can be designed to match multiple international standard interfaces such as ISO-KF, ISO-F, CF, etc
-Integrated flexibility: additional functions such as pre welded branch pipes, electrode leads, sensor interfaces, etc

Application field
semiconductor manufacturing
-Observation window for wafer processing equipment
-CVD/PVD equipment vacuum chamber connection
-Etching process monitoring window
photovoltaic industry
-Observation port for polycrystalline silicon purification furnace
-Thin film solar cell deposition equipment
-Photovoltaic material heat treatment monitoring
scientific research
-Synchrotron radiation beamline connection
-Particle detector observation window
-Materials Science High Temperature Reaction Chamber
-Vacuum coating equipment monitoring
high-end manufacturing
-Observation window of electron beam welding equipment
-Precision optical coating equipment
-Aerospace material testing equipment

Customized service capability
Custom sizing
-Micro series: 2-20mm, used for precision instruments and micro vacuum systems
-Standard series: 25-200mm, covering most industrial applications
-Large series: 200-500mm, meeting the needs of special large equipment
-Alien design: special geometric shapes such as non-circular and elliptical shapes
function customization
-Integrated pre welded fittings, flanges, and connectors
-Multi layer composite structure design (quartz+metal transition piece)
-Specific angle observation port design
-Anti pollution coating treatment

Customer Application Cases
Case 1: European Synchrotron Radiation Research Center
Requirement: A large quartz flange with a diameter of 300mm is needed for vacuum connection of X-ray beamlines. It is required to have excellent UV transmittance and maintain a vacuum degree of 10 ⁻⁷ Pa
Solution: Customized research and development of low hydroxyl content quartz materials (OH content<1ppm) to improve UV transmittance; Adopting a special annealing process to reduce stress birefringence
Result: After continuous operation for 3 years without performance degradation, the vacuum degree remained stable, meeting the requirements for high-intensity synchrotron radiation applications
Case 2: Asia's leading semiconductor enterprise
Requirement: The observation window of the CVD equipment on the 12 inch wafer production line is frequently contaminated, requiring high-temperature resistant, anti deposition coating, and easy to clean quartz flanges
Solution: Develop surface nano coating treatment technology to reduce reactant adhesion; Design a quick disassembly structure to reduce maintenance time by 70%
Result: The equipment maintenance cycle was extended from 2 weeks to 3 months, and the wafer yield rate increased by 2.3%
Case 3: North American Advanced Materials Laboratory
Requirement: A multi-channel observation reaction system requires a composite quartz flange that integrates thermocouple interfaces and sampling pipelines
Solution: Design three channel Φ 150mm flanges, integrate 2 KF25 interfaces and 1 sampling pipeline, pre-set Type K thermocouple slots
Result: Real time monitoring and sampling of the reaction process were achieved, and the efficiency of experimental data acquisition was tripled
Case 4: Australian Photovoltaic Research Institute
Requirement: The polycrystalline silicon purification furnace requires an observation window flange that can withstand high temperatures of 1450 ℃ and resist silicon vapor corrosion
Solution: Adopt high-density sintered quartz to enhance corrosion resistance; Design a double-layer protective structure to extend its service life
Result: The service life has been extended from 6 months to 24 months, and the annual maintenance cost has been reduced by 65%

Whether it's standard applications or special challenges, our engineering team is always ready to provide you with a full process solution from design consulting to delivery support. Please provide your specific parameter requirements or application scenarios, and we will send you a customized solution and quotation within one hour.
Contact our technical advisor immediately for sample testing or on-site application evaluation! Let our quartz flange become a reliable eye and connecting link for your vacuum system.

Luverre Quartz manufactures and sells a wide range of high quality fused quartz glass, including fused quartz tubes, fused quartz plates, fused quartz rods, fused quartz windows, fused quartz crucibles, fused quartz boats, fused quartz flanges, fused quartz beakers, fused quartz glass instruments, and more. We can meet all kinds of customized requirements for fused quartz glass products.
For more information, please feel free to contact us.
Why choose us?
1.We are more experienced.
We have over 19 years production experience of quartz items.
2.We are more efficient.
We reply customers’ requests within 24 hours and we have high efficient production, engineers and sales team.
3.Our quality is more guaranteed.
We control the quality from quartz lumps to quartz sand and then quartz products, we have better and stricter quality control than other manufactures.
4.We are able to produce more difficult quartz products.
We have large grinding platforms and precision etching machines which enable us to manufactures and sells a wide range of high quality quartz glass, including quartz tubes, quartz plates, quartz rods, quartz windows, quartz crucibles, quartz boats, quartz flanges, quartz beakers, quartz glass instruments, and more.
5. About 20 years of professional experience
-Focusing on the manufacturing of quartz products for a quarter century
-The average working experience of the technical team exceeds 15 years
6.Global Service Network
-Our products are exported to over 40 countries and regions including Europe, America, Japan, South Korea, and the Middle East
-Multi language technical support (English, German, French, Spanish, Russian, Japanese)
7. Flexible cooperation mode
Support small batch trial orders, medium - and long-term cooperation, and urgent production for urgent orders, providing OEM/ODM services.
2-500mm transparent vacuum quartz flange
What can quartz flanges solve for you?
Q: I need a transparent connecting component that can maintain stability in high temperature and high vacuum environments. What is the solution?
Answer: Our transparent vacuum quartz flange is designed for harsh environments and can maintain stable performance under ultra-high vacuum of 10 ⁻⁶ Pa and high temperature of 1200 ℃, solving the problems of corrosion, opacity, and mismatched thermal expansion coefficient of traditional metal flanges.
Q: Is it possible for our experimental equipment to observe the internal reaction process while ensuring vacuum sealing?
Answer: It's entirely possible. The transparent nature of quartz flanges allows you to observe internal processes in real-time, while the precisely ground sealing surface ensures vacuum integrity, killing two birds with one stone.
Q: Our project requires non-standard size flanges. Can we customize them?
Answer: Of course. We offer full-size customization of flanges ranging from 2mm micro to 500mm large, meeting the special needs of various fields such as semiconductors, photovoltaics, and scientific research.

The 2-500mm transparent vacuum quartz flange is made of high-purity synthetic quartz material (SiO ₂ content ≥ 99.99%), designed specifically for vacuum systems that require optical observation. The product has undergone precision annealing treatment, with an extremely low coefficient of thermal expansion (5.5 × 10 ⁻⁷/℃), ensuring dimensional stability and vacuum sealing performance under drastic temperature changes.

Key performance parameters
-Size range: 2mm to 500mm inner diameter, supports non-standard customization
-Vacuum performance: up to 10 ⁻⁶ Pa in ultra-high vacuum environment
-Temperature tolerance: Continuous working temperature of 1200 ℃, short-term up to 1450 ℃
-Transmittance characteristics: high transmittance in the ultraviolet to infrared band (170nm-2500nm)
-Surface accuracy: sealing surface flatness ≤ 1 μ m, roughness Ra ≤ 0.4 μ m
-Pressure tolerance: The standard model can withstand pressure cycles from 1 × 10 ⁻ ⊃3; Pa to atmospheric pressure

Detailed explanation of product advantages
1. Material advantages
-Ultra high purity: over 99.99% SiO ₂ content, metal impurity content below 1ppm
-Thermal stability: The coefficient of thermal expansion is only 1/15 of ordinary glass, and the thermal shock resistance is superior
-Chemical inertness: acid resistant (except hydrofluoric acid), alkali resistant, and resistant to most chemical corrosion
-Radiation stability: resistant to radiation yellowing, maintaining transparency for a long time
2. Manufacturing process advantages
-Precision annealing: eliminates internal stress, prevents deformation or cracking during use
-Laser cutting: Ensure smooth and flat edges, reduce microcracks
-Optical polishing: The sealing surface achieves optical grade flatness, ensuring vacuum sealing
-Ultrasonic cleaning: pollution-free assembly, avoiding particle contamination of the vacuum system
3. Functional advantages
-Observation and sealing integrated: solving the complexity of separating traditional observation windows from flanges
-Multi specification compatibility: can be designed to match multiple international standard interfaces such as ISO-KF, ISO-F, CF, etc
-Integrated flexibility: additional functions such as pre welded branch pipes, electrode leads, sensor interfaces, etc

Application field
semiconductor manufacturing
-Observation window for wafer processing equipment
-CVD/PVD equipment vacuum chamber connection
-Etching process monitoring window
photovoltaic industry
-Observation port for polycrystalline silicon purification furnace
-Thin film solar cell deposition equipment
-Photovoltaic material heat treatment monitoring
scientific research
-Synchrotron radiation beamline connection
-Particle detector observation window
-Materials Science High Temperature Reaction Chamber
-Vacuum coating equipment monitoring
high-end manufacturing
-Observation window of electron beam welding equipment
-Precision optical coating equipment
-Aerospace material testing equipment

Customized service capability
Custom sizing
-Micro series: 2-20mm, used for precision instruments and micro vacuum systems
-Standard series: 25-200mm, covering most industrial applications
-Large series: 200-500mm, meeting the needs of special large equipment
-Alien design: special geometric shapes such as non-circular and elliptical shapes
function customization
-Integrated pre welded fittings, flanges, and connectors
-Multi layer composite structure design (quartz+metal transition piece)
-Specific angle observation port design
-Anti pollution coating treatment

Customer Application Cases
Case 1: European Synchrotron Radiation Research Center
Requirement: A large quartz flange with a diameter of 300mm is needed for vacuum connection of X-ray beamlines. It is required to have excellent UV transmittance and maintain a vacuum degree of 10 ⁻⁷ Pa
Solution: Customized research and development of low hydroxyl content quartz materials (OH content<1ppm) to improve UV transmittance; Adopting a special annealing process to reduce stress birefringence
Result: After continuous operation for 3 years without performance degradation, the vacuum degree remained stable, meeting the requirements for high-intensity synchrotron radiation applications
Case 2: Asia's leading semiconductor enterprise
Requirement: The observation window of the CVD equipment on the 12 inch wafer production line is frequently contaminated, requiring high-temperature resistant, anti deposition coating, and easy to clean quartz flanges
Solution: Develop surface nano coating treatment technology to reduce reactant adhesion; Design a quick disassembly structure to reduce maintenance time by 70%
Result: The equipment maintenance cycle was extended from 2 weeks to 3 months, and the wafer yield rate increased by 2.3%
Case 3: North American Advanced Materials Laboratory
Requirement: A multi-channel observation reaction system requires a composite quartz flange that integrates thermocouple interfaces and sampling pipelines
Solution: Design three channel Φ 150mm flanges, integrate 2 KF25 interfaces and 1 sampling pipeline, pre-set Type K thermocouple slots
Result: Real time monitoring and sampling of the reaction process were achieved, and the efficiency of experimental data acquisition was tripled
Case 4: Australian Photovoltaic Research Institute
Requirement: The polycrystalline silicon purification furnace requires an observation window flange that can withstand high temperatures of 1450 ℃ and resist silicon vapor corrosion
Solution: Adopt high-density sintered quartz to enhance corrosion resistance; Design a double-layer protective structure to extend its service life
Result: The service life has been extended from 6 months to 24 months, and the annual maintenance cost has been reduced by 65%

Whether it's standard applications or special challenges, our engineering team is always ready to provide you with a full process solution from design consulting to delivery support. Please provide your specific parameter requirements or application scenarios, and we will send you a customized solution and quotation within one hour.
Contact our technical advisor immediately for sample testing or on-site application evaluation! Let our quartz flange become a reliable eye and connecting link for your vacuum system.

Luverre Quartz manufactures and sells a wide range of high quality fused quartz glass, including fused quartz tubes, fused quartz plates, fused quartz rods, fused quartz windows, fused quartz crucibles, fused quartz boats, fused quartz flanges, fused quartz beakers, fused quartz glass instruments, and more. We can meet all kinds of customized requirements for fused quartz glass products.
For more information, please feel free to contact us.
Why choose us?
1.We are more experienced.
We have over 19 years production experience of quartz items.
2.We are more efficient.
We reply customers’ requests within 24 hours and we have high efficient production, engineers and sales team.
3.Our quality is more guaranteed.
We control the quality from quartz lumps to quartz sand and then quartz products, we have better and stricter quality control than other manufactures.
4.We are able to produce more difficult quartz products.
We have large grinding platforms and precision etching machines which enable us to manufactures and sells a wide range of high quality quartz glass, including quartz tubes, quartz plates, quartz rods, quartz windows, quartz crucibles, quartz boats, quartz flanges, quartz beakers, quartz glass instruments, and more.
5. About 20 years of professional experience
-Focusing on the manufacturing of quartz products for a quarter century
-The average working experience of the technical team exceeds 15 years
6.Global Service Network
-Our products are exported to over 40 countries and regions including Europe, America, Japan, South Korea, and the Middle East
-Multi language technical support (English, German, French, Spanish, Russian, Japanese)
7. Flexible cooperation mode
Support small batch trial orders, medium - and long-term cooperation, and urgent production for urgent orders, providing OEM/ODM services.