UV quartz sleeves (also known as UV quartz tubes or quartz thimbles) are high-purity transparent quartz tubes designed to encase UV lamps in water and air disinfection systems. They protect the UV lamp from direct contact with water, air, or other working media while allowing maximum transmission of germicidal UV-C light for effective sterilization.
Core Functions & Applications
Quartz sleeves serve as a protective barrier between the UV lamp and the working medium, enabling efficient disinfection without chemical additives. Common applications include:
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Water treatment: Municipal drinking water systems, wastewater treatment plants, swimming pool disinfection, and point-of-use/point-of-entry UV purifiers
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Air & surface sterilization: HVAC systems, hospital air disinfection units, biosafety cabinets, and food processing facilities
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Industrial processes: Photochemical reactions, semiconductor wet bench cleaning, and ozone generation equipment
Material Properties & Key Advantages
Material Specifications
| Property | Specification |
|---|---|
| Material | High-purity fused quartz / synthetic quartz |
| SiO₂ Content | ≥ 99.99% |
| Hydroxyl (OH) Content | < 5 ppm |
| Working Temperature | Up to 950°C (continuous) |
| Softening Point | Approx. 1250°C |
UV Transmission Performance
| Wavelength | Minimum Transmittance |
|---|---|
| 254 nm (UVC germicidal) | ≥ 90% |
| 185 nm (ozone-generating) | Up to 90% (select grades) |
| 230–380 nm | ≥ 85% |
| Visible spectrum (400–700 nm) | ≥ 90% |
Key Advantages
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High UV transmittance (>90% at 254nm) ensures maximum sterilization efficiency with minimal energy loss
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Thermal shock resistance with a low coefficient of thermal expansion (approx. 5.5 × 10⁻⁷/°C)
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Excellent chemical resistance to acids, alkalis, and harsh operating environments
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Smooth surface finish (Ra ≤ 0.2μm) minimizes contaminant adhesion and simplifies cleaning
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Long service life under proper maintenance conditions
Technical Specifications
Standard Dimensions Table
| Outer Diameter (mm) | Wall Thickness (mm) | Length (mm) | End Type |
|---|---|---|---|
| 24 | 1.5 | 595 | Open / Closed |
| 24 | 1.5 | 900 | Open / Closed |
| 38 | 2.0 | 900 | Open / Closed |
| 38 | 2.0 | 1050 | Open / Closed |
| 38 | 2.0 | 1625 | Open / Closed |
Note: The above are standard reference dimensions. Custom sizes are available upon request.
Common Sizes Reference
| Inside Diameter (mm) | Outside Diameter (mm) | Wall Thickness (mm) | Typical Length Range |
|---|---|---|---|
| 20 | 23 | 1.5 | 875–1562 mm |
| 22 | 25 | 1.5 | 895–1575 mm |
| 25 | 28 | 1.5 | Up to 1950 mm |
End types available:
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Open both ends
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Closed one end (test tube style / dome end)
Customization options:
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Diameter range: 1–600 mm
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Length: up to 3000 mm (custom cut to specification)
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Special end treatments: fire-polished, flanged, ground, or sealed ends
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Surface treatments: inner/outer polishing, sandblasting, anti-fouling coatings
Quality & Compliance
Our quartz sleeves are manufactured under strict quality control standards, including:
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ISO 9001 certified production processes
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Material compliance with relevant industry specifications for UV-grade fused quartz
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100% visual inspection and dimensional verification prior to shipment
UV transmittance is verified at 254nm to ensure consistent sterilization performance across all production batches.
Maintenance & Care
To maintain optimal UV system performance:
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Inspect and clean the quartz sleeve every 3–6 months (or more frequently in hard water conditions)
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Use a soft cloth with mild acid solution (e.g., diluted citric acid or vinegar) to remove mineral scale
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Avoid abrasive cleaners that may scratch the quartz surface
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Replace the sleeve if permanent clouding, etching, or physical damage is observed
Routine cleaning maintains high UV transmittance and extends the service life of both the sleeve and the UV lamp.
