Lianyungang Vulra Quartz Products Co., Ltd.
Headquartered at No. 9, Dingxin Road, in the Jiangsu Donghai Economic Development Zone, Lianyungang Vulra Quartz Products Co., Ltd. is an on-site verified manufacturer specializing in high-purity fused silica glass products. Centered in China's quartz crystal hub, we leverage direct access to superior quartz sand resources to produce high-specification components for semiconductor fabrication, photovoltaic furnaces, optical instruments, and demanding analytical laboratories.
Verified Custom Manufacturer
Independently assessed and certified on-site by TÜV Rheinland. We operate dedicated hot glass-blowing, precision cold CNC machining, annealing, and surface treatment lines designed for custom OEM/ODM quartz parts.
- Assessment Authority: TÜV Rheinland On-Site Inspection Verified
- Business Type: Combined Manufacturer & Direct Exporter
- Core Competency: Drawing-based Customization & Sample Processing
- Purity Standards: SiO₂ Content from 99.99% up to 99.999%
Workshop Infrastructure & Tooling
Our integrated 1,900-square-meter facility houses 19 major production and cold-processing machinery units across two complete manufacturing lines.
High-Precision Cutting Center
Diamond saw blade cold-cutting for quartz tubes, rods, and heavy-walled blocks with chip-free edge profiles.
Machining & Docking Center
Multi-axis computerized tooling for accurate drilling, slot milling, and edge profiling to technical drawings.
Thermal Glass Lathes & Bonding
High-temperature oxy-hydrogen flame welding and tube joining with seamless molecular fusion.
Programmed Annealing Furnaces
Controlled thermal soaking cycles to eliminate mechanical and welding stresses, preventing cracking under thermal shock.
Surface Sand-Blasting Station
Even matte and frosted treatments for observation windows, diffusion barriers, and semiconductor shields.
Double-Sided Optical Polishing
Lapping and buffing systems delivering high parallelism, ultra-low roughness (Ra < 0.5 nm), and optical clarity.
Standardized Inspection & Material Traceability
Every quartz workpiece fabricated at Lianyungang Vulra Quartz Products Co., Ltd. undergoes multi-stage technical inspection, documented in compliance with ISO and global testing requirements.
Incoming Sand & Ingot Testing
Spectrochemical analysis verifies raw silica purity (SiO₂ ≥ 99.99%). Heavy metals like Fe, Al, Ca, Mg, and Ti are strictly governed within critical ppm/ppb thresholds.
In-Line Dimensional Tolerance
High-precision digital calipers, micrometers, and non-contact optical projectors monitor tube concentricity, wall thickness consistency, and diameter tolerances down to ±0.05 mm.
Polariscope Stress & Bubble Check
Polarizing stress meters inspect every hot-welded joint after annealing. Bubbles, inclusions, and scratches are categorized against ASTM and semiconductor industry class specifications.
International Accreditations & Test Reports
Our quartz products conform to European Union health, environmental, and chemical safety guidelines, facilitating seamless import clearance for international partners.
CE Conformity
HUAX251124604KCVerifies adherence to fundamental health, mechanical safety, and European Economic Area market requirements.
RoHS Directive
HUAX260323601KCRestricts hazardous elements (lead, mercury, cadmium, hexavalent chromium) in quartz laboratory and electronic components.
(EU) 2015/863 Test Report
HUAX251124604KRComprehensive third-party laboratory chemical analysis demonstrating strict non-toxicity and high material purity.
TÜV Rheinland On-Site
Verified SupplierOn-site premises inspection, legal establishment review, production capability, and quality workflow authenticated.
Worldwide Trade & Delivery Reliability
With 6+ years of international export experience, Lianyungang Vulra Quartz Products Co., Ltd. serves buyers across South America, the Middle East, South Asia, North America, and Europe with robust freight packing.
Logistics & Packaging Safeguards
Fragile quartz components require engineered export packaging to guarantee damage-free delivery worldwide.
- Nearby Export Ports: Lianyungang Port, Qingdao Port, Shanghai
- Packaging Method: Custom Pearl Cotton Foam + Non-Fumigation Wood Cases
- Sample Processing: Available from 1 Piece (Drawings / Samples Accepted)
- Accepted Payment: T/T, Wire Transfer, Commercial L/C
- Engineering File Formats: AutoCAD (DWG/DXF), STEP, IGES, PDF