Quartz Sight Glass Plate Boiler Fused Silica High Temperature Resistant
Engineered for biomass combustion boilers, autoclave observation, and industrial steam headers across San Kamphaeng and Saraphi processing plants.
Portfolio Architecture
Specialized Quartz Glass Products for Chiang Mai Delivery
Direct factory supply from Donghai County—the global center for raw silica refinement—delivering ISO-compliant quartz plates, observation viewports, and custom laser-cut fused silica hardware directly to industrial operations across Northern Thailand.
Quartz Substrate Plate for Semiconductor Fused Silica Clear Polished
Ultra-flat, double-sided optical polish with surface roughness Ra < 0.5 nm for thin-film deposition and cleanroom microfabrication.
Quartz Plate for Boiler Sight Glass Fused Silica Heat Resistant
Extreme thermal-shock resistance (ΔT 1,000°C water quench survived) ideal for food sterilization autoclaves and brewery kettles.
Quartz Plate with Center Hole Fused Silica Clear Polished Custom Size
CNC core-drilled fused silica discs designed for electrode penetrations, pyrometer viewports, and rotary shaft vacuum seals.
Laser Cut Quartz Glass Plate Fused Silica Precision Custom Size
Micro-crack-free laser profiled profiles with tight dimensional tolerances (±0.05 mm) for specialized photonics, masks, and jig fixtures.
Quartz Plate 100x100mm 200x200mm Fused Silica Clear Custom Cut
Standard modular dimensions (100x100 mm, 200x200 mm) kept in semi-finished blanks for rapid delivery to research institutions and prototyping labs.
Semiconductor Quartz Plate Fused Silica Substrate High Purity Custom
Ultra-pure fused silica featuring total trace metal contamination ≤20 ppm, ensuring zero ionic migration during high-heat diffusion runs.
Quartz Viewport Glass Quartz Window Plate Optical Window Quartz High Pressure
High-pressure sight windows tested up to 50 bar, providing >92% deep UV-to-near-IR optical transmission for spectroscopic analysis chambers.
Technical Integration
Localized Industrial Applications Across the Chiang Mai Ecosystem
How fused quartz glass technology solves high-heat, aggressive corrosion, and optical purity bottlenecks across Northern Thailand's transforming industrial corridors.
Northern Science Park & University Research
Chiang Mai University (CMU) and the Northern Science Park (NSP) lead regional innovation in photonics, biosensing, and materials science. VEZLO's JGS1 and JGS2 optical quartz substrates deliver deep ultraviolet transmission down to 185 nm, empowering academic cleanrooms with substrate planarity that resists thermal warp during thin-film sputtering.
Agro-Industrial Boilers & Food Extraction
From coffee processing hubs to longan dehydration facilities and craft distillation in Mae On and Hang Dong, standard soda-lime or borosilicate sight glasses routinely fail under cyclical thermal expansion. VEZLO's fused quartz sight glass plates sustain 1,100°C continuous operation and withstand abrupt cooling shocks without catastrophic micro-fracturing.
Sanitary UV Sterilization Systems
Chiang Mai’s high-density hospitality, municipal water sanitization, and specialized medical clinics rely heavily on high-output C-band UV sterilizers. VEZLO manufactures both ozone-free quartz sleeves (transmitting 254 nm germicidal wavelengths while filtering out ozone-generating 185 nm bands) and dual-wavelength pure fused silica tubes for wastewater purification.
Material Science Benchmark: Fused Silica vs. Traditional Industrial Glasses
For procurement managers across Chiang Mai, selecting between standard borosilicate 3.3 and authentic fused silica determines equipment MTBF (Mean Time Between Failures). Below is the certified performance comparison based on laboratory testing:
| Physical / Chemical Metric | High Purity Fused Quartz (VEZLO) | Borosilicate Glass 3.3 | Soda Lime Industrial Glass |
|---|---|---|---|
| Silica Purity (SiO₂) | ≥ 99.99% | 80.5% - 81% | 70% - 72% |
| Coefficient of Thermal Expansion (0-300°C) | 5.5 × 10⁻⁷ / °C | 33 × 10⁻⁷ / °C | 90 × 10⁻⁷ / °C |
| Continuous Safe Working Temperature | 1,100 °C (1,200°C peak) | 450 °C - 500 °C | 120 °C - 150 °C |
| Thermal Shock Resistance (ΔT) | 1,100°C to Ice Water without cracking | 150°C to 180°C shock limit | 60°C to 80°C shock limit |
| UV Transmission (254 nm Germicidal) | > 90% (JGS1 / HP Clear) | < 5% (Strongly absorbs UV) | 0% (Completely opaque to UV-C) |
| Acid Resistance (except HF & hot H₃PO₄) | Class 1 Superior Inertness | Class 1 Resistant | Class 2 Moderate |
Data verified via VEZLO Donghai QA testing laboratories. Raw material input controlled at ≤ 20 ppm metallic contaminants.
Market Trajectory
Emerging Procurement Trends in the Northern Thailand Corridor
Strategic shifts altering OEM/ODM sourcing patterns for industrial glass across Chiang Mai, Lamphun, and the broader Lanna Economic Zone.
Nearshore Lamphun Tech Spillover
The Northern Region Industrial Estate (NRIE) in neighboring Lamphun hosts major multinational electronic component manufacturers. Chiang Mai has become an auxiliary hub for custom engineering tooling, jig manufacturing, and sensor test fixtures where precision laser-cut quartz glass and quartz carriers are sourced for prototyping without the overhead of massive minimum order quantities.
Rise of Direct Factory OEM Collaborations
Local purchasing agents in Northern Thailand are increasingly bypassing domestic stockists in Bangkok to eliminate domestic markup and lead-time bottlenecks. Direct partnerships with source manufacturers in Donghai, China offer Chiang Mai enterprises customized dimensions, bespoke beveling, customized hole drillings, and immediate access to ISO-backed trace analysis certifications.
Decarbonization & High-Heat Solar Collectors
Chiang Mai’s agricultural sector is modernizing toward solar-thermal drying and high-efficiency concentrating solar power (CSP) biomass systems. Fused quartz tubing and flat glass covers serve as ultra-durable thermal windows that do not solarize, yellow, or degrade under the intense UV radiation and extreme heat cycles typical of high-elevation Northern Thailand facilities.
Manufacturing Pedigree
VEZLO Quartz: Factory Integration & Engineering Edge
Positioned in Donghai County—China’s quartz capital—VEZLO controls the complete supply chain from raw silica crystallization to high-precision flame synthesis and CNC fabrication.
Source-Level Raw Material Control
We synthesize and process high-purity quartz sand across 13 specialized grades with conventional metallic impurities ≤20 ppm, ensuring finished glassware remains virtually free from bubbles, micro-inclusions, and high-temperature devitrification.
Provincial & National R&D Honors
Our 320 mm high-purity quartz tube development was completed under the Jiangsu Provincial Science & Technology Support Project. Our newly developed 520 mm large-diameter furnace tube has passed the preliminary national review for new materials.
Full-Scale Custom CNC & Cold Finishing
In addition to drawing fused quartz tubes (OD 2 mm to 500 mm), we provide complete precision secondary processing: optical grinding, double-sided chemical-mechanical polishing (CMP), waterjet profiling, center drilling, and laser slotting to exact CAD drawings.
Fast Technical Communication (≤ 2h)
Procurement teams across Thailand benefit from immediate engineering feasibility checks. Inquiries submitted via live chat or direct RFQ receive formal technical responses within 2 hours, backed by full CAD validation and material test certificates.
Zero-Damage Global Export Packaging
Fragile quartz viewports, wafers, and extended tubes are safeguarded using multi-density polyethylene pearl cotton, individually vacuum-sealed sleeves, and fumigation-free wooden cases engineered for air cargo direct to Chiang Mai International Airport (CNX) or sea freight via Laem Chabang.
Verified Supplier & Trade Assurance
With an audited footprint of over 33,000 square meters and onsite inspections by independent third-party certification bodies, VEZLO delivers financial transparency, flexible payment structures (T/T, L/C), and guaranteed production lead times.
Procurement Guide
Frequently Asked Questions by Thai Buyers
Answers to key technical, logistical, and commercial inquiries routinely posed by procurement engineers and factory managers in Chiang Mai.
How do I determine whether to choose JGS1, JGS2, or JGS3 quartz glass?
The choice is dictated by your spectral transmission requirements. JGS1 (synthetic silica) provides the highest optical transmission in the deep ultraviolet range (185–2500 nm) with zero bubbles, ideal for precision optics and UV laser viewports. JGS2 (fused quartz made from natural crystal) is the industrial standard for UV-to-NIR applications (220–2500 nm), optimal for boiler sight glasses and thermal viewports. JGS3 is designed for infrared equipment (260–3500 nm) and features exceptionally low OH content.
What are the logistics routes and transit times for shipments to Chiang Mai?
For urgent prototype batches, custom wafer substrates, or emergency maintenance sight glasses, we ship via express air courier directly to Chiang Mai International Airport (CNX) with a typical transit window of 3 to 5 business days following dispatch. For large-volume orders, full-pallet quartz tubing, and furnace hardware, cargo is shipped by ocean container to Laem Chabang Port, cleared through Thai Customs, and moved via overland bonded freight to your facility in Chiang Mai within 10 to 14 days.
Can you fabricate custom circular sight glasses with non-standard bolt holes?
Yes. VEZLO specializes in OEM/ODM customization from technical drawings or CAD files (.DXF, .DWG, .STEP). We produce circular or rectangular sight glasses up to 50 mm thick, complete with CNC precision-drilled center holes, stepped countersinks, chamfered or rounded safety edges, and fine perimeter ground finishes to ensure tight seal integrity within high-pressure autoclave flanges.
How do you guarantee breakage prevention during export transit?
We maintain an industry-leading breakage rate of <0.1% for international shipments. Every quartz piece is individually enveloped in non-static bubble wrapping or form-fitting high-density pearl cotton (EPE), grouped within heavy-duty double-wall corrugated inner boxes, and packed inside custom-built, shock-isolated fumigation-free plywood shipping crates reinforced with steel corner brackets.
What dimensional tolerances and surface finishes can your facility achieve?
For standard precision quartz plates and windows, our standard dimensional tolerance is ±0.1 mm, with tight tolerance capabilities reaching ±0.02 mm upon request. For optical and semiconductor substrates, we achieve double-sided optical polishing with surface quality meeting 60/40 or 40/20 Scratch-Dig, surface flatness within λ/4 to λ/10 per inch, and surface roughness Ra < 0.5 nm.
Can VEZLO provide Form E Certificates of Origin for tariff reduction in Thailand?
Yes. Under the ASEAN-China Free Trade Agreement (ACFTA), we can provide authenticated Form E Certificates of Origin along with standard commercial invoices and packing lists. This allows eligible quartz glass products imported into Thailand to benefit from preferential tariff treatment or zero-duty customs classification.