Who We Are & What We Deliver
Donghai Kemzo Quartz Products Co., Ltd. is situated in the scenic coastal industrial hub of Lianyungang, Jiangsu, China. Strategically anchored in Donghai County—globally recognized as the silicon and crystal capital—we combine premium regional raw material access with modern thermal processing technology to produce high-performance fused quartz components.
Since our establishment in 2011, we have integrated research, precision manufacturing, and international trade. Our advanced production equipment, comprehensive inspection laboratories, and rigorous quality assurance protocol ensure that every quartz tube, plate, crucible, and custom flame-worked component fulfills stringent industrial, scientific, and semiconductor specifications.
With an ongoing commitment that “Client is the Center, Quality is the Key,” our experienced engineering and trade teams provide dependable OEM and ODM support for demanding procurement requirements worldwide.
Manufacturing & Technical Capabilities
Our vertically integrated operations cover raw sand purification, continuous furnace drawing, CNC cutting, polishing, and custom hot-working.
Raw Material Control
Direct sourcing from high-purity natural silica deposits. Rigorous magnetic separation and acid washing deliver SiO₂ content exceeding 99.99% with trace metallic impurities.
Precision Processing
Comprehensive in-house fabrication including high-speed wire cutting, ultrasonic drilling, CNC surface milling, double-sided optical polishing, and fire-polishing.
OEM & Custom Drawings
Experienced technical team capable of fabricating complex quartz labware, ground taper joints, quartz diffusion tubes, and quartz boats tailored to CAD/PDF engineering drawings.
Strict QA / QC Protocol
End-to-end verification utilizing polarimeters for thermal stress relief inspection, spectrophotometers for optical transmission, and precision micrometers for strict tolerances.
Thermal Shock Resilience
Our quartz products withstand continuous operating temperatures of 1100 °C and intermittent peaks up to 1450 °C, offering exceptional resistance to rapid thermal cycling.
Export Packaging Safety
Customized cushioning, multi-layer shockproof wrapping, internal partitioned cartons, and reinforced export-grade plywood crates designed to ensure zero breakage during international transit.
Corporate & Operational Profile
Essential enterprise information verified via on-site audits and international management system certifications.
| Category | Enterprise Verified Detail |
|---|---|
| Company Name | Donghai Kemzo Quartz Products Co., Ltd. |
| Operational Address | 7 North Huaya Road, Lianyungang, Jiangsu, China |
| Year Established | 2011 |
| Business Type | Manufacturer, Trading Company (OEM / ODM / Buyer Label Supported) |
| Quality Management | ISO 9001 Certified System & Jiangsu High Technology Enterprise |
| Total Employees | 11 – 50 Specialized Staff |
| Main Product Families | Transparent Quartz Tubes, Crucibles & Boats, Polished Quartz Plates, Quartz Rods, Semiconductor Diffusion Tubes, High-Purity Quartz Sand & Labware |
| Customer Support Email | [email protected] |
| Inquiry Response Rate | 100% (Average response time ≤ 1 hour) |
| Accepted Delivery Terms | FOB, CFR, CIF, EXW, DDU, DAF, Express Air/Door-to-Door Delivery |
| Accepted Payment Methods | T/T, L/C, PayPal, Cash (Currencies: USD, EUR, AUD, HKD, CNY) |
Worldwide Export & Market Distribution
Donghai Kemzo Quartz Products Co., Ltd. serves industrial manufacturers, analytical laboratories, and optical instrument suppliers in over 30 countries.
Ready to Discuss Your Custom Quartz Requirement?
Whether you require standard transparent quartz tubes or customized components machined to tight drawing tolerances, our engineering team provides technical feasibility and cost feedback promptly.