STAGE 01 Raw Materials Cutting
High-grade natural quartz rock crystals are inspected, sorted, and segmented by automated cutting machinery to prepare clean feedstocks.
Cutting Machine SGS Onsite Verified · Custom Manufacturer
Precision Fused Quartz Engineering & Source Manufacturing
Lovri Quartz Products Co., Ltd. is a specialized custom manufacturer of high-purity fused silica and quartz glass components, operating out of Tuofeng Industrial Park in Lianyungang, Jiangsu — China's central hub for silica raw material reserves and quartz processing technology.
With 14,271 m² of verified production floorspace and an integrated fabrication chain spanning raw silica sand refining, high-temperature tube drawing, lathe sealing, precision CNC grinding, and polarization stress inspection, we supply global semiconductor, optical, photovoltaic, and laboratory equipment builders with zero-defect components.
14,271 m² Verified Plant Area
99.99% SiO₂ Material Purity
≤ 2 Hours Average Response Time
Lovri Quartz Products Co., Ltd. Onsite Factory Assessment Completed by SGS Group
Data Verified by Third-Party Audits
Operational Performance Benchmarks
Independent performance metrics audit of Lovri Quartz Products Co., Ltd. demonstrating higher reliability and lower defect risks for global procurement teams.
5.0
Supplier Rating Score
Rated 4.6% higher than category average
End-to-End Vertical Manufacturing
Quartz Processing Workflow & Machinery
By controlling every phase from quartz mineral refinement to 5-axis CNC machining in-house, Lovri Quartz Products Co., Ltd. guarantees material traceability, lower batch tolerances, and rapid prototyping turnaround.
STAGE 01 
STAGE 02 Raw Materials Pulverizing
Crushing bulk quartz chunks into uniform-grain silica sand using high-powered pulverizer mills without heavy metal contamination.
Pulverizer Machine
STAGE 03 Rescreening & Sizing
Multi-stage vibrating mesh screen separators grade silica sand grains to ensure homogeneous melting density during tube pulling.
Rescreen Machine
STAGE 04 Chemical Acid Pickling
Submerging silica sand in purified acid baths to extract trace iron and alkali elements, boosting purity to ≥ 99.99% SiO₂.
Pickling Machine
STAGE 05 Quartz Tube Drawing
Continuous thermal drawing systems pulling molten quartz into precision diameter tubes, heavy-wall sleeves, and solid glass rods.
Tube Drawing Machine
STAGE 06 Furnace Annealing
Controlled thermal soaking and cooling cycles relieve mechanical internal strain, drastically minimizing thermal shock fracturing.
Annealing Machine
STAGE 07 End Sealing & Shaping
Precision oxy-hydrogen glass-blowing lathes seal flat, round, or hemispherical bottom configurations on custom quartz furnace tubes.
End Sealing Machine
STAGE 08 Sealing & Flange Welding
Skilled quartz technicians fuse flanges, threaded joints, and branch conduits seamlessly into customized reaction chambers.
Sealing Machine
STAGE 09 Vacuuming & Degassing
High-vacuum baking ovens eliminate moisture and volatiles for critical semiconductor furnace components and sealed lamp jackets.
Vacuuming Machine
STAGE 10 CNC Machining Center
Multi-axis diamond-tooled CNC routers perform precision wafer boat slotting, drilling, milling, surface grinding, and optical polishing.
CNC Center
STAGE 11 Quality Metrology & QA
Laser micrometer dimension validation, surface bubble/inclusion checks, and stress testing against technical drawings.
Test Machine
STAGE 12 Export Packaging Line
Cleanroom wrapping, shockproof pearl cotton cushioning, and reinforced export wooden casing engineered for zero breakage in air/sea transit.
Packing Line Enterprise Strengths
Verified Manufacturing Competence
Key operational capabilities of Lovri Quartz Products Co., Ltd. verified during comprehensive onsite technical audits.
Customization on Demand
Full OEM & ODM design services converting CAD/STEP drawings into functional quartz parts.
- Drawing-based engineering
- Rapid sample prototyping
- Tolerances down to ±0.02 mm
Production Scale
Spacious industrial footprint equipped with high-throughput continuous furnaces.
- 14,271 m² plant area
- 16 dedicated line operators
- Full machinery redundancy
R&D & Material Science
In-house glass technicians providing optical and thermal consultation for specialized systems.
- Dedicated R&D engineers
- JGS1, JGS2 & JGS3 grade analysis
- Custom thermal shock modeling
Global Trade Experience
Experienced handling customs, fumigation certifications, and hazardous transit protection.
- 5+ years global export history
- Exporting to NA, EU, Asia & LATAM
- Direct access to Shanghai Port
QA / QC Standards
Strict quality control checkpoints ensuring purity, dimensions, and zero micro-cracks.
- 2 dedicated QA/QC inspectors
- Polarization stress test per lot
- Material inspection batch logs
Certified Compliance
International regulatory testing verifying chemical safety and market access suitability.
- CE Compliance (HTT202607592R)
- RoHS Directive (HTT202607592CH)
- SGS Group factory audit
Zero Defect Testing Reliability Under High Thermal Stress
Optical Polarization Strain Testing
Microscopic structural tension from improper thermal cooling is the primary reason quartz glass tubes explode or fracture prematurely when exposed to extreme thermal cycling (>1100 °C) in high-temperature furnaces and CVD reactors.
At Lovri Quartz Products Co., Ltd., each finished production batch passes through our in-house optical polarization stress tester to measure and verify birefringence patterns. Only components meeting international optical stress relief standards proceed to packaging and dispatch.
Full Annealing Cycle Validation Zero Internal Birefringence Flaws