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Custom-engineered Transparent U-shaped Quartz Tube for Industrial Devices-TOQUARTZ®
Key Features of Transparent U-Shaped Quartz Tubes
TOQUARTZ® Transparent U-shaped quartz tubes are manufactured from high-purity fused silica, offering exceptional performance in demanding applications that require precise bending, thermal stability, and optical clarity.
Optical Performance
-
UV to IR transparency:
92–93% transmission (1.0mm thickness) -
Refractive index:
1.4585 (at 587.6 nm, Nd line) -
Low OH content:
Minimizes UV absorption for applications like lithography
Thermal Resistance
- Short-term use: 1300°C
- Long-term stability: 1100°C
- Softening point: 1780°C
- Snnealing point: 1250°C
- Compressive strength: 1100 MPa
- Young's modulus: 72,000 MPa
- Mohs hardness: 5.5–6.5
Technical Specifications of Transparent U-Shaped Quartz Tubes
TOQUARTZ® U-shaped Transparent quartz tubes are manufactured to precise tolerances and undergo rigorous quality control to ensure consistent performance in demanding applications.
| Category | Parameter | Value |
| Chemical Composition | SiO₂ | 99.97% min |
| Trace Metals (Fe, Al, Na, etc.) | <10 PPM total | |
| Physical Properties | Density | 2.2 g/cm³ |
| Thermal Conductivity (20°C) | 1.4 W/m·°C | |
| Coefficient of Thermal Expansion | 0.55 × 10⁻⁶/°C (20–300°C) | |
| Thermal Shock Resistance | ΔT > 1000°C (air to water quench) | |
| Optical Properties | Transmittance (1.0mm thickness) | 92% (250nm UV), 93% (550nm visible) |
| IR Cutoff | ~3.5 μm | |
| Electrical | Dielectric Constant (1 MHz) | 3.75 |
| Dimensional Specifications | Inner Diameter Range | 3mm – 150mm |
| Wall Thickness Range | 0.5mm – 5mm | |
| Bend Radius Range | 5mm – 500mm | |
| Standard Leg Length | 50mm – 1000mm (custom available) | |
| Dimensional Tolerance | ±0.1mm (diameter), ±5% (bend radius) |
TOQUARTZ® Solving Challenges with Clear U-Shaped Quartz Tubes
Transparent U-Shaped Quartz Tubes for UV Disinfection Systems
Key Advantages
-
Consistent Wall Thickness ±0.1mm
Ensures uniform UV intensity across the arc, reducing disinfection failure risk by 18%. -
UV Transmission ≥92% at 254nm
Delivers optimal germicidal efficiency in low-pressure mercury lamp systems. -
Low OH Content ≤10ppm
Minimizes UV absorption loss, extending lamp lifespan by up to 20%.
TOQUARTZ® solution
A German UV lamp manufacturer reported uneven UV output due to ±0.3mm wall thickness variation from a local supplier, causing 12% of units to fail final QA. TOQUARTZ® delivered U-shaped quartz tubes with ±0.1mm tolerance and ≥92% UV transmittance at 254nm, reducing failure rate to under 2%.
U-Shaped Clear Quartz Glass Tubes for Precision Laboratory Systems
Key Advantages
-
Thermal Expansion Coefficient 0.55×10⁻⁶/°C
Maintains dimensional stability during 1000+ thermal cycles in GC and TGA systems. -
Acid Resistance (Excl. HF)
Withstands prolonged exposure to HCl, HNO₃, and H₂SO₄ at 90°C without degradation. -
Dimensional Tolerance ±0.1mm
Ensures leak-free sealing in analytical setups with precision connectors.
TOQUARTZ® solution
A U.S. analytical instrument OEM faced 15% rejection due to poor sealing caused by ±0.2mm diameter deviation. TOQUARTZ® supplied U-shaped quartz tubes with ±0.1mm tolerance and verified acid resistance, reducing rejection to <1% and improving assembly yield by 14%.
Fused Silica U-Shaped Clear Tubes for Industrial Heating Applications
Key Advantages
-
Thermal Stability up to 1200°C
Operates continuously in IR heating systems without deformation or sagging. -
Stress-Relieved Bend Zones
Reduces thermal fatigue cracking by 35% in high-cycle heating environments. -
Custom Bend Radius (±5% Tolerance)
Enables precise heat distribution in confined or curved heating assemblies.
TOQUARTZ® solution
A Japanese IR dryer manufacturer experienced 22% failure at bend points due to thermal fatigue in competitor tubes. TOQUARTZ® provided stress-relieved U-shaped quartz tubes with 30mm bend radius and 1200°C stability, extending tube life by 40%.
TOQUARTZ® Custom Transparent U-Shaped Quartz Tube Services
TOQUARTZ® offer extensive customization options for clear U-shaped quartz tubes to meet your specific application requirements, including specialized dimensions, end finishing, and material specifications.
Custom Geometries
- Variable bend angles (45°-180°)
- Asymmetrical leg lengths
- Multi-bend configurations
- Variable-diameter sections
End Treatments
- Fire-polished ends
- Precision ground ends
- Flared or beaded ends
- Thread-compatible finishes
Special Materials
- Low-OH content for UV applications
- Doped quartz for specific UV blocking
- Ultra-high purity (99.995% SiO₂)
- Opal quartz for IR applications
Usage Guidelines for Transparent U-shaped Quartz Tube
Proper handling, installation, and maintenance of clear U-shaped quartz tubes ensures maximum performance and extended service life in your applications.
Handling & Storage
- Handle with clean gloves to prevent surface contamination and fingerprints
- Store in original packaging or clean, dust-free containers
- Avoid mechanical stress on bend regions during handling and transport
- Support both legs when carrying to prevent stress at the bend
Installation Best Practices
- Use silicon or graphite ferrules for connections rather than metal fittings
- Avoid over-tightening fittings that can create stress points
- Allow for thermal expansion when designing mounting systems
- For electrical applications, ensure proper grounding of metal end fittings
Temperature Management
- Heat and cool gradually (maximum rate: 150°C/minute) to prevent thermal shock
- For short-term operation above 1100°C, ensure the tube is free from mechanical constraints
- Avoid direct contact between quartz and metal components at high temperatures
- For water-cooled applications, ensure water flow before heating to prevent thermal stress
Cleaning & Maintenance
- Clean with ultrapure water, acetone, or isopropyl alcohol
- For stubborn deposits, use dilute HF acid (extreme caution required)
- Inspect regularly for micro-cracks, especially at bend points
- Replace tubes if any surface damage is detected, as this can lead to failure
Get Expert Assistance for Your U-Shaped Quartz Tube Requirements
Why Partner with TOQUARTZ
Direct Factory Advantage
As a direct manufacturer, we can cut out the numerous intermediate links.
Engineering Expertise
Technical team guides clients from material selection to design optimization, translating specs into deliverables.
Flexible Manufacturing
Handling standard & custom orders via small-batch expertise and prototyping rigor to meet urgent deadlines.
Quality
Assurance
Pre-shipment 3-step validation:
1. dimensional accuracy,
2. material purity ,
3. performance thresholds
Global Supply Chain
Reliable global logistics to industrial hubs (DE/US/JP/KR priority) with trackable milestones.
Releted Products
As a specialized manufacturer with direct factory capabilities, TOQUARTZ provides both standard and custom quartz solutions with engineering support throughout the specification and implementation process.
FAQ
Q: What is a clear U-shaped quartz tube used for?
A: U-shaped quartz tubes are primarily used in UV disinfection systems, laboratory analytical equipment, infrared heating applications, and specialized scientific instruments. Their bent configuration allows for compact design in equipment where space is limited, creates continuous flow paths for gases or liquids, and enables specific optical or thermal paths required in specialized equipment.
Q: What are the standard sizes for transparent bent quartz glass tubes?
A: TOQUARTZ® standard U-shaped quartz tubes are available in inner diameters ranging from 6mm to 25mm with wall thicknesses from 1mm to 3mm. Standard bend radii include 20mm, 30mm, and 50mm. However, we specialize in custom dimensions and can produce U-tubes with inner diameters from 3mm up to 150mm, wall thicknesses from 0.5mm to 5mm, and bend radii from 5mm to 500mm to meet specific application requirements.
Q: Can clear U-shaped quartz tubes withstand vacuum conditions?
A: Yes, TOQUARTZ® U-shaped clear quartz tubes perform exceptionally well in vacuum applications. With proper wall thickness selection, they can withstand vacuum pressures down to 10⁻⁶ Torr without risk of implosion. The excellent mechanical strength of quartz (compressive strength of 1100 MPa) and our stress-relieved bending process ensure structural integrity under vacuum conditions. For high-vacuum applications, we recommend minimum wall thicknesses based on diameter ratios and can provide specialized surface treatments to minimize outgassing.
Q: Can transparent U-shaped quartz tubes be used for high-temperature applications?
A: Yes, TOQUARTZ® transparent U-shaped quartz tubes excel in high-temperature applications. They maintain dimensional stability at continuous operating temperatures up to 1100°C and can withstand short-term exposure to temperatures up to 1300°C. The low thermal expansion coefficient (0.55 × 10⁻⁶/°C) makes them resistant to thermal shock, allowing for rapid temperature changes without cracking. This makes them ideal for industrial heating elements, semiconductor processing equipment, and high-temperature laboratory apparatus.
Q: How do I specify custom U-shaped quartz tube dimensions?
A: To specify custom U-shaped quartz tubes, provide the following dimensions: inner diameter (ID), outer diameter (OD) or wall thickness, bend radius (measured to tube centerline), leg lengths (from bend center to each end), and any special end treatments (fire-polished, ground flat, flared, etc.). For complex geometries, we can work directly from your technical drawings or CAD files. Our engineering team is available to assist with design optimization and recommend specifications based on your application requirements.
Contact our engineering team for technical consultation and pricing. We’ll help you select the optimal specifications for your application requirements.