Optical Grade
XRD Quartz Sample Holder Circular Transmittance Plate
High melting point optical-grade fused silica sample disc designed for zero background noise and high transmittance in X-ray diffraction analysis.
Export-Grade Inventory
Specialized Immersion Components & Precision Quartzware
Engineered in Donghai and CE/RoHS compliant, each quartz reactor well, analytical sample cell, and high-temperature apparatus is fabricated to withstand hostile thermal conditions, harsh photolysis, and corrosive acids.
Heavy-Duty
SJ 150 Thick Wall Polished Immersion Quartz Sleeve
Oversized translucent thick-wall jacket offering 1100°C thermal resistance, zero ozone contamination, and exceptional structural pressure tolerance.
Thermal Transfer
High Thermal Conductance Heat-Exchange Quartz Discs
Engineered interlayer chips offering a 1730°C softening point and uniform thermal dispersion for jacketed photolytic and thermal reactor assemblies.
Semiconductor & BET
Custom High-Purity Quartz C-Shaped Analytical Tube
Precision-bent, gas-tight quartz manifold tailored for BET surface-area analysis and ultra-pure gas circulation systems operating under high vacuum.
Acid/Alkali Proof
High-Temperature Acid-Resistant Quartz Basket & Crucible
Fire-polished quartz immersion basket and crucible featuring 200-mesh porous structures, immune to acid corrosion and zero devitrification at 1100°C.
Ozone Free
99.999% Purity Double-Jacket Right-Angle Quartz Elbow
Precision co-axial fused quartz joint with seamless oxy-hydrogen welding, preventing coolant leakage while circulating cooling fluids around UV sources.
Fine Filtration
Corrosion-Resistant 400-Mesh Quartz Filter Vessel
Engineered for extreme purity separation, featuring a sintered quartz disc with ultra-low micro-bubble density for petrochemical analysis.
Photoelectrochemical
Sealed Dome-Closed Quartz Photoelectrochemical Cell
Hermetically sealed quartz immersion cell with custom port configurations, designed for advanced photocatalytic water splitting and solar fuel experiments.
Engineering Whitepaper
Optical Transmission & Thermal Physics of Quartz Immersion Wells
Understanding the difference between standard borosilicate sleeves and optical-grade synthetic/fused silica immersion wells is critical for photochemical yield and thermal shock prevention in demanding industrial applications.
| Material Property | Vulra Semiconductor-Grade Fused Quartz | Synthetic Fused Silica (Suprasil Equiv.) | Standard Borosilicate (Pyrex Type) |
|---|---|---|---|
| UV Cut-off Wavelength | ≈ 200 nm (JGS2 Optical Window) | ≈ 160 nm - 170 nm (Deep UV JGS1) | ≈ 310 nm (Opaque to UV-C / UV-B) |
| UV-C Transmission (@254 nm) | ≥ 90% - 92% | ≥ 93% - 94.5% | < 5% (Severe Absorption) |
| Thermal Expansion (0-300°C) | 5.5 × 10⁻⁷ cm/cm·°C (Ultra-low) | 5.1 × 10⁻⁷ cm/cm·°C | 32.5 × 10⁻⁷ cm/cm·°C (6x Higher) |
| Softening Point (°C) | 1683 °C | 1730 °C | 820 °C |
| Thermal Shock Resistance | Withstands 1100°C plunge into cold water | Withstands 1150°C rapid quench | Fails at ΔT > 150°C |
| Ozone Generation Option | Ozone-Free (Doped Ti) or Ozone-Yielding | High Ozone Yielding (VUV Grade) | Non-Applicable |
Regional Industrial Integration
Localized Quartz Applications Across Hat Yai & Southern Thailand
As the economic center of Songkhla province, Hat Yai unites leading academic research centers with advanced agro-processing, rubber polymerization, and wastewater bio-remediation facilities requiring robust chemical apparatus.
Advanced Photocatalytic Research at PSU
Hat Yai's Prince of Songkla University (PSU) leads Southeast Asia in green energy synthesis, photocatalytic water purification, and nano-materials science. Our CE-certified immersion wells serve within coaxial photochemical reactors, providing maximum spectral transmission at 254 nm and 365 nm for evaluating titania-based photocatalysts without optical degradation or solarization.
Rubber Latex & Polymerization Processing
Songkhla is a global heartland for natural rubber latex transformation. Modern polymer plants utilize high-flux ultraviolet immersion wells for photo-initiated grafting and monomer curing. Fused quartz sleeves safeguard medium-pressure mercury and excimer lamps against cooling jacket thermal shifts while preventing sulfurous cross-contamination.
Seafood Processing & Effluent AOP Treatment
With massive marine processing estates surrounding Hat Yai and Songkhla port, advanced oxidation processes (AOP) combining UV-C irradiation with ozone/hydrogen peroxide are mandatory for industrial discharge compliance. Our heavy-walled quartz wells provide dependable corrosion protection against high chemical oxygen demand (COD) effluent.
Market Evolution
Southern Thailand’s Green Industry Transition Accelerates Demand for High-Purity Quartz
Under Thailand’s Bio-Circular-Green (BCG) economic model, industrial zones across Songkhla, Surat Thani, and Hat Yai are upgrading older analytical and synthesis apparatus to meet international zero-emission standards. In legacy setups, standard borosilicate or low-grade glass sleeves frequently clouded due to solarization or failed prematurely under continuous exothermic loads.
Modern engineering standards across ASEAN require triple-jacketed quartz immersion wells that support high-efficiency chiller loops. By operating high-wattage UV lamps (400W–2000W) in temperature-controlled immersion chambers, researchers and industrial chemists achieve steady quantum yield while preventing thermal decomposition of sensitive bio-compounds derived from palm oil and oleochemical synthesis.
Furthermore, regional cross-border logistics between southern Thailand and northern Malaysian tech parks have accelerated the need for on-demand OEM quartz components capable of rapid change-outs with zero drawing deviation.
Enterprise Capability
Direct Manufacturing From Donghai, the World's Crystal Capital
Lianyungang Vulra Quartz Products Co., Ltd. combines geographical raw material superiority with verified manufacturing standards, delivering custom quartz solutions with complete traceability.
TÜV Rheinland Assessed
Our factory premises, production lines, and business capacities are independently audited on-site by TÜV Rheinland. We operate authenticated ODM and OEM workshops ensuring every unit matches buyer specifications.
Donghai Raw Material Cluster
Located at No. 9 Dingxin Road, Donghai Economic Development Zone, we draw directly from first-tier natural silica crystal sand deposits, guaranteeing stable 99.99%–99.999% SiO₂ purities with minimal hydroxyl (OH⁻) content.
Full-Process Workshop
From automated diamond cutting, cold core drilling, and computer-controlled polishing to oxy-hydrogen glass lathe welding and secondary electric de-stress annealing, all stages remain tightly integrated in-house.
CE Directives Compliant
RoHS 2011/65/EU Certified
TÜV Rheinland Audited
Procurement Guide
Frequently Asked Questions by Hat Yai Engineers & Researchers
Clear technical insights addressing logistics, customized fittings, photolysis performance, and import clearances into Songkhla and southern Thailand.
Q1: How does an immersion well differ from standard quartz reactor tubing?
A standard quartz tube is open on both ends or finished with a simple flat seal. A quartz immersion well features a coaxial double-walled (or triple-walled) jacket with precision-welded inlet and outlet coolant ports (GL-14 threads or ground glass joints). This structure allows water or chillers to circulate continuously around a high-intensity lamp, filtering infrared heat while allowing maximum UV flux to penetrate into the surrounding solution.
Q2: Can we order a single bespoke immersion well to fit our existing reactor in Hat Yai?
Yes. Our minimum order quantity (MOQ) for custom fabricated immersion wells, XRD holders, or electrolytic cells is 1 piece. You can submit CAD drawings, hand-sketched blueprints, or photos with dimensions indicating inner/outer diameters, total height, ground joint specs (such as standard taper 24/40, 29/32, or 45/50), and hose barb orientations.
Q3: Should we specify Ozone-Free quartz or High-Purity Optical quartz?
For applications where you require full spectrum irradiation down to 185 nm (such as total organic carbon degradation or in-situ ozone generation), choose synthetic clear fused silica. However, if personnel safety, air handling limitations, or selective 254 nm / 365 nm photolysis is required, choose ozone-free fused quartz, which is doped to absorb UV bands below 220 nm.
Q4: How are fragile immersion wells packaged to prevent transit damage to Thailand?
Every immersion well undergoes high-pressure DI water washing and annealing before individual cushioning in form-fitted high-density EPE foam. Multi-layer cartons are suspended inside export-grade fumigated wooden crates. In the rare event of transit damage, our insured door-to-door CIF Hat Yai terms ensure immediate free remanufacture and replacement.
Q5: What are the lead times and shipping routes to Songkhla / Hat Yai?
Standard custom samples typically complete fabrication in 7 to 10 working days. Express air courier shipments via DHL, FedEx, or SF International reach Hat Yai International Airport (HDY) within 3 to 5 transit days. For recurring batch supply to industrial plants, sea freight consolidations land directly via Songkhla Port or Bangkok's Laem Chabang Port.
Q6: Do your products arrive with CE declarations and material testing certificates?
Yes. Every shipment includes our manufacturer declaration of conformity (CE mark), RoHS compliance certificate, and spectroscopic transmission/purity reports verifying SiO₂ concentrations above 99.99%. This documentation simplifies duty clearance and university grant reporting across Thailand.
Plan Your Next Photochemical Installation With Vulra Quartz
Whether you require a custom double-walled immersion well for laboratory synthesis at Prince of Songkla University or volume supply of heavy-duty quartz tubes for Songkhla's manufacturing sectors, our technical engineers are ready to review your specifications.