Featured Precision Engineering and Assembly Parts for High-Performance HVAC/R Infrastructure
In the highly demanding landscape of industrial heat exchange, HVAC system manufacturing, and high-efficiency refrigeration loops, Copper Level Wound Coils (LWC) serve as the foundational conduit for refrigerant flow. LWC copper tubing represents a highly optimized metallurgical product designed specifically for automated high-volume processing lines, such as hairpin benders, return benders, and tube expansion equipment.
By eliminating intermediate joints and providing continuous lengths of several kilometers on a single reel, Copper LWC minimizes potential leak paths, substantially reduces material scrap rates, and ensures uninterrupted high-speed assembly. Our manufacturing processes utilize C12200 Phosphorus-Deoxidized High Residual Phosphorus (DHP) copper, adhering strictly to global standards including ASTM B280, ASTM B68, and EN 12735-1.
| Parameter | Specification | Compliance |
|---|---|---|
| Alloy designation | C12200 / Cu-DHP | ASTM B280 / EN 12735-1 |
| Copper Content (Min) | 99.90% | High Purity Cleanliness |
| Phosphorus Range | 0.015% - 0.040% | Deoxidized structure |
| Temper Classifications | O60 (Soft Annealed) | Optimized for Bending |
| Tensile Strength | ≥ 220 MPa | Mechanical integrity |
| Elongation (Min) | 40% | Excellent ductility |
Founded in 1988, our roots trace back to the prestigious Xiangshan Refrigeration Accessories Factory of Zhejiang University. Over 30 years of technological growth and supply chain development have transformed us into a comprehensive global enterprise integrating R&D, design, manufacturing, and global sales of advanced refrigeration components and copper solutions.
In 2021, Taojun was recognized as a National High-Tech Enterprise in China. Our brand, "Lingshan," is synonymous with uncompromising reliability in the domestic and international refrigeration fields. Today, we are proud to serve as a key tier-1 supplier and manufacturing partner for major appliance brands including Haier, Xinfei, Midea, Gree, Whirlpool, Electrolux, and Huarui.
Operating from our modern facilities in Xiangshan, Ningbo, we maintain strict adherence to international standards and are certified with ISO9001:2015, EU RoHS environmental directives, and US UL safety certifications.
Why Tier-1 Appliance Manufacturers and Global Distributors Rely on Taojun
Our core production lines and automated machining equipment are imported directly from Germany, guaranteeing strict mechanical tolerances of ±0.02 mm.
Our engineering center comprises 15 senior specialists and researchers holding doctorates or academic titles from the University of Science and Technology of China (USTC).
We process customized dimensions, specialized temper variations, and complex configurations with low MOQs of 500 units and direct technical onboarding.
We import high-performance materials directly from premium suppliers in Japan and Europe to guarantee zero color drift, no thermal shrinkage, and excellent stability.
All parts undergo thermal shock testing (10°C to 90°C), environmental high/low temp aging (500 hours at -35°C to 75°C), and 100V breakdown testing.
Integrated manufacturing execution system (MES) provides full production transparency, batch traceability, and automated CCD camera visual inspection.
As the refrigeration and HVAC/R industries pivot toward greener alternative refrigerants such as Propane (R290) and Carbon Dioxide (CO2/R744), the operating pressures of thermal management loops have increased significantly. This structural shift requires copper components and tubing with superior mechanical strength and structural integrity.
Consequently, wholesale buyers and procurement managers are prioritizing factories that demonstrate advanced raw material selection, high-precision extrusion, and continuous eddy current testing to eliminate metallurgical flaws. Level Wound Coils from China are leading this transition by combining state-of-the-art extrusion technology with unbeatable scale efficiencies.
Proximity to major domestic copper smelting centers guarantees raw material price stability and continuous processing without logistics delays.
Continuous casting and high-speed drawing systems combined with smart warehousing cut conversion costs by up to 22% compared to Western manufacturers.
In-house physical and chemical testing laboratories inspect each batch for grain size distribution, tensile strength, and cleanliness to ensure compliance with ASTM standards.
Providing Verified Structural Data and Testing Frameworks for Global OEMs
Our quality assurance program is built on five distinct operational pillars to ensure that every delivery meets your exact requirements:
Main Certification Document
Detailed Scope of Certification
Thirty-Eight Years of Industrial Development and Engineering Heritage
Established as Xiangshan Refrigeration Accessories Factory of Zhejiang University, initiating high-precision alloy research.
Expanded manufacturing base, deploying automated extrusion equipment and entering domestic commercial cooling markets.
Deployed MES workshop management system, obtaining ISO 9001 and UL approvals for international market expansion.
Achieved National High-Tech Enterprise status with advanced laboratories, serving tier-1 brands globally.
At Taojun, we believe a global brand must be supported by a strong corporate culture. We understand that culture is formed through Impact, Infiltration, and Integration. The development of our group has been driven by our core values: Honesty, Innovation, Responsibility, and Cooperation.
Building long-term customer partnerships based on transparent operations and reliable quality control.
Continuous investment in manufacturing processes, custom tooling, and alloy processing technologies.
Maintaining high safety standards, environmental compliance, and complete material traceability.
Working closely with customers to optimize their supply chains and develop custom technical solutions.
Expert Answers to Common Industry and Metallurgical Questions About Copper LWC and Component Manufacturing
Premium Accessories for Refrigerant Filtration, Control, and System Integration
Taojun