About Zelvo Quartz
Lianyungang Zelvo Quartz Products Co., Ltd. is located in Donghai County, Jiangsu Province – renowned globally as China's "Crystal Capital" and the country's primary hub for quartz raw materials and precision thermal processing. We specialize in the research, manufacturing, and worldwide export of high-purity experimental and industrial fused quartz glass products.
Our product range includes premium optical quartz glass sheets, sapphire windows, clear and thick-wall quartz tubes, high-purity quartz rods, CVD furnace quartz boats, flanged tubes, beakers, crucibles, and customized laboratory glass instruments. Leveraging advanced laser drilling, precise grooving, flame bending, and CNC cutting technologies, we supply leading clients in semiconductor, solar PV, infrared heating, aerospace, chemical engineering, and research universities. Every product is engineered to deliver exceptional thermal stability up to 1200 °C, superior chemical inertia, and optimal optical transmittance across UV-Vis-IR spectra.
Fabrication Workshop 
Precision Processing Line 
Optical & Dimensional QC Global Markets & Trade Footprint
With established supply chains and overseas logistics experience, Lianyungang Zelvo Quartz Products Co., Ltd. supplies custom quartz solutions to scientific research institutions, industrial OEMs, and international distributors across major geographic regions.
Manufacturing Capabilities & OEM/ODM Excellence
We provide complete drawing-based manufacturing for non-standard quartz components. Our factory combines modern precision CNC machining with veteran hot-glass fabrication skills.
Laser Drilling & Grooving
Micron-level micro-hole laser perforation, multi-slot milling, and edge step routing with clean, crack-free edges.
Drawing-Based Tailoring
Support for CAD, STP, DXF, and PDF engineering drafts. Quick evaluation and feedback by our seasoned quartz engineers within 2 hours.
Flame Bending & Welding
Skilled thermal glassblowing for U-tubes, coiled condensers, multi-joint manifolds, and hermetic flange joints.
Pre-Shipment Quality Control
Rigid verification of dimensional tolerances, bubble/inclusion levels, surface finish, and stress birefringence prior to export.
Need a Custom Solution for Your Application?
Send your drawings or technical parameters. We ensure rapid feasibility confirmation and competitive factory direct pricing.