Direct supply from ISO 9001:2015 certified production lines
In the rapidly expanding refrigeration and industrial HVAC/R markets, pancake copper coils (Level Wound Coils / LWC) stand as the fundamental component dictating system efficiency, leak safety, and longevity. Made primarily from Deoxidized High Phosphorus Copper (DHP C12200), pancake copper tubing provides the supreme electrical and thermal conductivity required to meet strict global green transition guidelines.
As direct regulatory bodies enforce phased downs of traditional refrigerants in favor of eco-conscious substitutes (such as R32, R410A, and natural propane R290), operational pressures inside refrigeration circuits have increased significantly. Procurement directors now require pancake copper coils configured to resist high mechanical stress, ensure absolute structural integrity, and provide ultra-clean interior surfaces.
Ningbo Taojun Refrigeration Equipment Co., Ltd. answers this call with advanced metallurgical processes, delivering high-purity copper products and engineered refrigeration assemblies designed to thrive in demanding industrial, commercial, and residential conditions.
Located in the highly accessible tourist and logistics hub of Xiangshan, Ningbo, Ningbo Taojun Refrigeration Equipment Co., Ltd. was built upon the engineering legacy of its predecessor, the Xiangshan Refrigeration Accessories Factory of Zhejiang University. Over 30 years of technological growth and manufacturing evolution have established us as a comprehensive national high-tech enterprise.
We specialize in the full lifecycle of refrigeration parts—integrating research and development, smart manufacturing, global distribution, and professional technical support. Our leading product lines encompass high-precision filter driers, check valves, air conditioning service valves, wire-tube and finned condensers, brass/copper fittings, and related installation systems.
Guided by our domestic brand "Lingshan", our products have become a benchmark of performance and reliability inside China and key export markets, including North America, Europe, South America, and the Middle East. Through constant process engineering, we remain committed to securing absolute customer satisfaction.
Years of Engineering Experience
Doctoral & University R&D Specialists
Export Countries & Regions
Target Component Defect Rate
Analyzing key technical specifications for volume business acquisitions
Industrial HVAC system fabricators mandate ASTM B280, ASTM B68, and EN 12735-1 compliance. Our pancake copper coils ensure a minimum Cu-DHP purity of 99.9% with phosphorus content controlled between 0.015% and 0.040% for optimal weldability and crack resistance.
Residual oil or dust inside the tubes ruins modern compressor systems. Taojun copper coils undergo internal mechanical cleaning and nitrogen purging. This keeps interior residues below 0.038g/m², satisfying the most sensitive refrigeration parameters.
Automated manufacturing lines require consistent wall thickness tolerances (within ±0.02mm) and precise outer diameters. Proper annealing ensures elongation rates above 40%, preventing flattening or cracking during automated bending operations.
Engineered thermal integration across diverse refrigeration sectors
Whether fabricating condensing units for residential air conditioners or integrating heavy-duty commercial cold storage, copper components must handle dynamic thermal cycling without grain boundaries cracking. Our technical team works alongside key global partners to deliver optimized integration solutions.
How we guarantee zero-defect products through precise manufacturing technology
Our core production units are imported directly from Germany, while our high-purity ITO films and liquid crystal spacers come from Japan. This balance of machinery ensures sub-micron manufacturing accuracy.
Our raw materials must pass thermal shock tests (from 10°C to 90°C for 30 minutes) and damp heat testing for 500 hours. Finished parts undergo vacuum nitrogen baking to remove all latent moisture.
Our facility runs an integrated Manufacturing Execution System (MES) paired with CCD visual sorting. We run 100V high-voltage insulation tests on specialized materials and helium leak tests on all copper parts.
TAOJUN copper filter driers are engineered specifically to absorb moisture and acid, while trapping solid particulate contaminants before they reach critical compressor parts. They serve as essential factory components and highly reliable repair parts in residential freezers, industrial cold closets, and multi-split air conditioners.
A reliable brand rests upon a strong corporate culture. We focus our manufacturing work on four core values: Honesty, Innovation, Responsibility, and Cooperation.
Honesty & Integrity: Our operation prioritizes long-term relationships, reliable manufacturing outputs, and transparency. This philosophy guides every partnership step we take.
Product Innovation: Innovation keeps our lines agile. By updating concepts, designs, and production methods, we adapt to shifting environmental policies and changing market requirements.
Responsibility: We take ownership of the quality we produce. Our engineers maintain consistent focus on supply chain accountability and chemical safety regulations.
Strategic Cooperation: We align our capabilities with household appliance and commercial refrigeration brands, including Haier, Xinfei, Midea, Gree, Whirlpool, Electrolux, and Huarui, developing tailored solutions that benefit both parties.
A history of factory expansions, process upgrades, and technical achievements
Upgraded our physical production space, bringing in advanced extrusion and drawing lines to meet rising regional demands.
Adopted our MES workshop management system, linking production data with our quality assurance databases.
Introduced high-definition CCD vision systems and real-time digital helium inspection loops across all product lines.
Industrial procurement requires verified compliance documentation. Taojun Refrigeration maintains up-to-date certifications to satisfy international audit requirements.
Our quality certificates are registered with China's CNCA (www.cnca.gov.cn) and verified through Zhongci International (www.zcgirz.com).
ISO 9001 Certification Document
Detailed Scope Verification
A structured approach from design evaluation through final delivery
We offer flexible engineering and custom fabrication capabilities for global purchasers seeking custom sizing, specific bending radiuses, or specialized brazing options.
Work directly with sales engineers offering over 15 years of technical industry experience. 24-hour service lines ensure responses within 8 hours.
We work with custom design documents and target geometries, completing prototype evaluations before starting volume manufacturing runs.
Our products carry a one-year warranty, backed by lifetime technical support. We check in with clients regularly to gather performance data and optimize future product iterations.
Answering major technical, compliance, and logistics questions from global distributors
Detailed view of our components, engineering lab, and manufacturing work
Our components operating in heating, cooling, and industrial air systems
Our engineering team is supported by a dedicated corporate culture. We focus our collaborative efforts on executing reliable product developments.
Zhejiang University Roots: Our team maintains a close partnership with the University of Science and Technology of China (USTC) and Zhejiang University, utilizing their metallurgical research to improve our processing methods.
Engineering Expertise: Our R&D center houses 15 senior engineers holding advanced degrees, allowing us to troubleshoot integration issues, refine heat transfer ratios, and design high-stability copper tubes.
By coordinating the talents of our researchers, we help our partners optimize their system layouts, reduce overall processing costs, and maintain a competitive edge in their local markets.
Premium solutions for global supply chains and assembly operations
Deep-dive view into the catalog and specialized refrigeration components
By positioning our operations close to major shipping hubs in Ningbo and Shanghai, we facilitate efficient dispatch and transit times for international shipments. Our logistics team handles custom clearance, cargo tracking, and port scheduling to keep deliveries on time.
Our copper components, filter driers, and service valves are currently integrated into consumer products and commercial cooling installations across Europe, the Americas, Southeast Asia, the Middle East, and Africa.
We work to establish clear, stable, and mutually beneficial supply lines that help our partners secure their production schedules and maintain efficient inventories year-round.
Taojun