STEP 01
Raw Materials Cutting
Selected high-grade quartz lumps are precisely sectioned, inspected for mineral clarity, and prepared for processing.
Enterprise Overview
Precision Fused Quartz Glass Manufacturing Partner
Lovri Quartz Products Co., Ltd. is a dedicated custom manufacturer of high-purity fused quartz glass components based in Lianyungang, Jiangsu Province—the heart of China's silica and quartz industry. With abundant natural silica resources and decades of glassworking heritage, our facility provides end-to-end fused silica solutions for international procurement teams.
Our comprehensive production infrastructure spans from raw silica crystal sorting, pulverizing, and acid pickling to automated tube drawing, annealing, precision CNC grinding, hot sealing, and optical stress testing. By keeping every critical phase in-house, we eliminate quality discrepancies, guarantee ≥ 99.99% SiO₂ chemical purity, and deliver custom geometries engineered precisely to CAD and STEP technical drawings.
14,271 m²
SGS Onsite-Audited Plant Area
≥ 99.99%
SiO₂ High Chemical Purity
100% In-House
From Raw Ore to Machined Parts
Polarization Test
Internal Stress Checked Per Batch
Lovri Quartz Products Co., Ltd.
Onsite Verified by SGS Group
Integrated Production
Complete 12-Step Quartz Manufacturing Workflow
From mineral beneficiation to clean-room packaging, our disciplined production cycle ensures chemical purity, tight dimensional tolerances, and high thermal stability.
STEP 02
Pulverizing Process
Mechanical crushing units reduce raw quartz lumps into uniform high-purity granular sand ready for chemical purification.
STEP 03
Rescreening & Sorting
Multi-mesh vibrating screens ensure tightly classified grain size distribution, optimizing melting consistency.
STEP 04
Acid Pickling
High-grade multi-acid baths wash out metal ions (Fe, Ti, Al), upgrading the silica purity to ≥ 99.99%.
STEP 05
Tube & Rod Drawing
High-temperature furnace drawing produces continuous clear and opaque quartz tubes and rods with stable outer diameter.
STEP 06
Thermal Annealing
Controlled thermal treatment relieves internal residual stress, preventing micro-cracking under rapid thermal cycles.
STEP 07
Precision End Sealing
Skilled glassblowers and automated rotary torches seal flat, round, and domed bottom profiles on closed-end quartz tubes.
STEP 08
Sealing & Torch Welding
High-temperature oxy-hydrogen flame welding seamlessly connects quartz flanges, branch ports, and reaction vessels.
STEP 09
Vacuuming & Degassing
High-vacuum pumping units eliminate trapped gases, ensuring hermetic sealing for vacuum jackets and laser tubes.
STEP 10
CNC Machining
Multi-axis CNC milling, drilling, slotting, and polishing create intricate geometries with ±0.02 mm tolerances.
STEP 11
Multi-Check Inspection
Every piece undergoes dimensional verification, polarization stress analysis, bubble checks, and optical clarity testing.
STEP 12
Export Packaging
Cleaned components receive anti-scratch wrapping, custom foam cushioning, and reinforced export wooden cases.
Advanced Facility
Production Machinery & Processing Centers
Our modern machinery fleet enables high-volume output while adhering strictly to customized client specifications for semiconductor, optics, and industrial furnace sectors.
Diamond Cutting Machine
Precise sizing & sectioning
Pulverizer Machine
Crushing silica raw lumps
Rescreen Machine
Granular separation system
Pickling Station
Chemical purity purification
Tube Drawing Machine
Continuous thermal drawing
Annealing Furnace
Stress relief thermal cycle
End Sealing Machine
High-precision bottom sealing
Glassblowing Lathe
Joint welding & flange assembly
Vacuuming Machine
Deep molecular degassing
CNC Machining Center
Drilling, slotting & contouring
Testing & Inspection Station
Optical & physical verification
Packaging Line
Shockproof ocean/air packing
Quality Assurance
Rigorous Testing Standards & In-House Laboratory
At Lovri Quartz Products Co., Ltd., product reliability in harsh thermal and vacuum conditions is paramount. Unrelieved internal stress is the leading cause of unexpected quartz failure in semiconductor furnaces and high-power laser systems.
Our dedicated quality assurance laboratory utilizes scientific testing equipment to validate every manufacturing batch prior to export dispatch.
Polarization Stress Testing
Every annealed quartz tube, plate, and welded vessel is evaluated via polarized light to ensure zero hazardous birefringence or internal tension.
Spectral Transmittance & Purity Analysis
Spectrophotometers certify deep UV (JGS1), standard optical (JGS2), and infrared (JGS3) transmission characteristics.
Dimensional & Tolerancing Verification
High-precision digital calipers, air-gauge micrometers, and optical comparators verify wall concentricity, diameter, and edge parallelism.
Ready to Work with a Verified Quartz Manufacturer?
Submit your technical drawings (CAD, DWG, PDF, or STEP) or request customized samples. Our engineering team reviews manufacturability and provides technical quotes within 24 hours.
Contact Us