Kovar Glass Sealing Fittings For Medium and High Temperatue Collector Tube
Material:
4 j29 / W.N r. 1.3912 / AISI/ASTM F15 / JIS EMAS – 1001
Dimensions: 7-188mm
Material thickness: 0.8-4.0mm
Process: Stamping and machining
Product technical requirements:
After processing, the parts need to be purified by hydrogen furnace, so that the sealed glass surface has no bubbles to remove impurities such as carbon.
Application: Kovar Alloys for Medium and High Temperatue Collector Tube Sealing
Get a quote
Product Description:

Kovar Glass Sealing Fittings for Medium & High-Temperature Collector Tubes
Engineered for Extreme Environments: Uncompromising Seals Where Heat Matters
Our precision Kovar Glass-to-Metal Sealing Fittings, specifically designed to deliver exceptional reliability and hermetic integrity in medium and high-temperature collector tube applications.
Key Features & Benefits:
-
Superior Thermal Compatibility: Kovar alloy’s coefficient of thermal expansion (CTE) is meticulously matched to borosilicate and specialized high-temperature sealing glasses. This critical match prevents stress fractures and maintains hermetic seals during repeated thermal cycling from ambient to operational extremes (typically -60°C to +450°C+, depending on glass type).
-
Unmatched Hermeticity: Achieves and maintains ultra-high vacuum (UHV) levels and leak-tight integrity essential for sensitive processes in collector systems, even under sustained high-temperature operation. Ideal for applications demanding minimal gas permeation.
-
Robust High-Temperature Performance: Withstands the demanding thermal environments found in solar thermal collectors, concentrated solar power (CSP) systems, high-vacuum furnaces, specialized instrumentation, and other industrial processes where collector tubes operate at elevated temperatures.
-
Exceptional Strength & Durability: Kovar alloy provides excellent mechanical strength and resistance to deformation under thermal stress, ensuring long-term structural integrity of the fitting and the seal.
-
Corrosion Resistance: Offers good resistance to oxidation and corrosion in challenging operating atmospheres encountered in collector systems.
-
Precision Engineering: Manufactured to exacting tolerances for consistent, reliable sealing performance and easy integration into collector tube assemblies.
Ideal Applications:
-
Solar Thermal Collectors (Evacuated Tube Systems)
-
Concentrated Solar Power (CSP) Receiver Tubes
-
High-Temperature Vacuum Furnaces & Ovens
-
Scientific Instrumentation & Sensor Housings
-
Hermetic Feedthroughs for Power or Measurement in Hot Zones
-
Vacuum & Pressure Vessels requiring reliable high-temp seals
-
Lamp and Laser Envelopes

Why Choose Our Kovar Seals?
-
Proven Reliability: Decades of proven performance in critical thermal sealing applications.
-
Mission-Critical Integrity: Designed to prevent catastrophic failure and ensure continuous operation in demanding collector tube systems.
-
Material Science Expertise: Leveraging the unique properties of Kovar alloy for optimal glass bonding and thermal stress management.
-
Customization Available: Standard sizes readily available, with options for custom geometries, glass types (including hard glasses), and lead configurations to meet specific collector tube design requirements.
Ensure the longevity, safety, and performance of your medium and high-temperature collector tube systems. Choose our precision Kovar Glass Sealing Fittings – the seal you can trust when temperatures soar.
Related products
-
Glass Vacuum Tube Components
4j29 Kovar Alloy Glass Vacuum Melt Sealing Welding Processing
Read more
FAQ
You can tell us your needs (such as specifications, quantities, materials, drawings, etc.) by email(info@prekovar.com), phone or by submitting the form on our website.
With over 10 years of specialized focus on Kovar/alloy processing, we master the unique challenges of this low-expansion material. Our advanced stamping techniques ensure micron-level accuracy, ideal for critical applications in electronics, aerospace, and hermetic sealing components.










