Explore our factory-direct catalog featuring high-precision parts engineered for maximum thermal and physical efficiency.
Ningbo Taojun Refrigeration Equipment Co., Ltd. is located in Xiangshan, Ningbo, a beautiful tourist city. Founded in 1988, its predecessor was the Xiangshan Refrigeration Accessories Factory of Zhejiang University. Harnessing over 35 years of thermodynamic engineering and metallurgical expertise, the company's leading products include filter driers, check valves, air conditioning valves, condensers, brass and copper accessories, air conditioning cable ties, and an array of critical refrigeration accessories.
After 30 years of rapid development, it has evolved into a comprehensive enterprise integrating research and development, design, testing, advanced manufacturing, and after-sales service. In 2021, Taojun was recognized as a National High-Tech Enterprise, demonstrating our capability for structural process innovation and global-scale production.
With an unwavering pursuit of client satisfaction, our "Lingshan" brand has achieved market leadership in China and international acclaim. The company has passed ISO9001:2008 quality management system certification, EU ROHS environmental directive certification, and US UL certification, ensuring compliance with strict global standards.
Designed to extend system operational lifespan and optimize thermal efficiency across domestic and commercial platforms.
Since 1988, Taojun has refined the production of refrigeration parts, copper drying filters, condensers, access valves, and complex piping geometries. We have manufactured copper filter driers for 41 years in cumulative industry experience.
Our copper filter driers feature high-purity copper shells packed with a 3A molecular sieve (water absorption ≥20%) and an activated carbon layer to catch contaminants, prevent capillary blockage, and shield compressors from corrosion.
Using advanced orbital argon arc welding and automated helium leak detection, every drier shell guarantees pressure resistance and zero micro-leaks under harsh temperature fluctuations.
Deep industry analysis detailing metallurgical advancements and international standards compliance.
Air Conditioning and Refrigeration (ACR) tubing acts as the primary conduit for heat transfer media in HVAC/R applications. As global environmental protocols mandate the transition from high-GWP (Global Warming Potential) HFCs to low-GWP alternatives (e.g., R32, R290/propane, CO2/R744), operating pressures have scaled dramatically. Modern systems demand tubing capable of resisting burst pressures exceeding 120 bar while maintaining micro-tolerance geometric accuracy.
Consequently, metallurgical purity has become paramount. Leading manufacturers utilize deoxidized high-phosphorus copper (C12200, Cu-DHP), with a minimum copper content of 99.90% and phosphorus levels controlled between 0.015% and 0.040%. This composition provides exceptional weldability, corrosion resistance, and thermal conductivity necessary to sustain performance under severe environmental shifts.
Furthermore, internal microgrooving technology has emerged as an industry baseline. By rolling helical ridges inside the copper tubing, the inner surface area increases by up to 120%. This design promotes turbulent refrigerant flow, disrupting the laminar boundary layer and elevating the heat transfer coefficient by over 100% compared to smooth-bore options.
Why sourcing from Ningbo, China offers unprecedented scale, cost optimization, and technical precision.
Situated in Ningbo, Zhejiang province, Taojun benefits from China's primary metallurgical and port infrastructure. Raw copper cathodes are refined, processed, drawn, and tested within a 50km radius, reducing logistical overheads and mitigating supply chain risks.
Our facility integrates continuous casting and cold-drawing lines with in-line annealing systems. This setup ensures consistent tempering (from soft O60 to hard H80) and uniform grain structures across production lots.
Since implementing our MES intelligent workshop management system in 2008, each batch of copper pipe, filter drier, and access valve is tracked from raw material melt number through extrusion, bending, welding, to final pressure test.
Chinese manufacturing efficiency relies on combining high automation with design agility. At Ningbo Taojun, our manufacturing equipment is imported directly from Germany to meet international specifications. This mechanical foundation is overseen by an engineering group consisting of doctors and professors from the University of Science and Technology of China.
This allows us to maintain a low MOQ (500 units) and support rapid OEM/ODM prototyping. Whether partners need non-standard capillary tube structures, custom copper drying filters, or complex pre-bent copper branching lines, our advanced tooling shop delivers finished prototypes within 7 days.
Decades of manufacturing precision, certified quality, and comprehensive global service.
Core manufacturing and testing equipment imported directly from Germany ensures mechanical consistency, precise wall thickness control, and reliable product performance.
Our engineering center features 15 PhD and professor-level consultants from the University of Science and Technology of China, specializing in thermodynamics and metallurgy.
Our raw ITO films (no shrinkage, no color difference) and liquid crystal spacers are sourced directly from Japan, and specialty glues from Europe, to sustain performance under severe conditions.
Every batch undergoes high & low temperature testing (75°C to -35°C for 500 hours), thermal shock trials, damp heat tests, and 24-hour electrical/pressure safety tests.
From our beginning in 1988 as the Xiangshan Refrigeration Accessories Factory of Zhejiang University, we have focused on technological innovation. Key milestones include:
Adapting ACR tubing and components to modern cooling infrastructure requirements.
Our high-purity copper and aluminum piping systems are utilized across several sectors:
As cooling demands increase, the ACR industry faces three key challenges:
Refrigerant Transition: The shift to low-GWP natural alternatives (R290 propane, R744 CO2) requires components designed to handle higher operational pressures and resist chemical corrosion.
System Decarbonization: Manufacturers optimize thermal transfer via microgroove copper tubes and low-flow-resistance designs, reducing compressor power draw.
Smart Diagnostics: Integrating sensor-equipped inline filter driers allows operators to monitor moisture, pressure drop, and system health in real time.
Tour our laboratory and production workshops to see our quality assurance systems in action.
Our extrusion and drawing floor maintains consistent ambient control to prevent copper oxidation during processing.
High-precision automated orbital welding and inline leak detection ensure consistent product quality.
Equipped with spectrometers, burst test rigs, and carbon residue measurement instruments to verify ASTM/EN standards.
Ningbo Taojun Refrigeration Equipment Co., Ltd. operates under a certified quality management framework. We hold official GB/T19001-2016 / ISO9001:2015 registration (No. 41325Q00065R0S), covering the design, manufacturing, and supply of filter driers, condensers, and access valves.
Our quality system is verified by Zhongci International and auditable through China's CNCA database. For global HVAC/R OEM partners, these accreditations confirm our commitment to material traceability, process control, and risk mitigation.
Main ISO Certificate
Detailed Certification Scope
We work to ensure all manufactured components meet safety, ecological, and trade compliance requirements across North America, Europe, and Asia-Pacific:
Technical support throughout the product lifecycle to ensure integration and operation.
Our sales engineers offer direct consultations to help specify materials and configurations for your application:
We provide long-term engineering and logistical support after product delivery:
Answers to technical and logistical questions for procurement professionals and HVAC/R engineers.
Factory-direct components for refrigeration cycles, air conditioning loops, and industrial HVAC/R maintenance.
Taojun