High-performance copper, brass, and aluminum OEM/ODM components utilized by world-class home appliance brands.
Founded in 1988, the predecessor of our company was the Xiangshan Refrigeration Accessories Factory of Zhejiang University. Today, Ningbo Taojun Refrigeration Equipment Co., Ltd. is located in Xiangshan, Ningbo—a prominent industrial and coastal port city. Backed by 35+ years of production experience and academic R&D collaboration, Taojun has grown into a comprehensive enterprise integrating design and development, raw material processing, robotic production, and global delivery of advanced HVAC/R accessories.
In 2021, Taojun was formally accredited as a National High-Tech Enterprise in China. This status reflects our continued investment in automated manufacturing systems, advanced copper brazing technologies, and the rigorous optimization of fluid dynamics inside refrigeration systems.
Our core product lineup includes copper and steel filter driers, condenser coils, access valves, check valves, air conditioning installation brackets, copper and brass connection components, and specialty HVAC insulation wraps. Our domestic brand "Lingshan" is highly valued within China's domestic appliance manufacturing market, and our export brand "Taojun" serves multi-national OEMs in Europe, the Americas, Southeast Asia, and the Middle East.
Bundy tubing (double-walled, copper-brazed low-carbon steel tubing) is the industry standard for high-pressure, vibration-prone environments. Known for its exceptional structural integrity, thermal conductivity, and resistance to high fatigue limits, Bundy tubing is crucial in household refrigerators, heavy-duty commercial condensers, and automotive climate control loops.
As global environmental frameworks demand a transition away from traditional HFCs to natural alternatives such as R290 (Propane) and R744 (Carbon Dioxide), components must handle significantly higher operating pressures. Standard copper tubes are often prone to micro-cracking or leaks under extreme pressure cycles. Double-walled steel Bundy tubes, reinforced with copper brazed coatings and fitted with high-precision brass terminals, provide the mechanical toughness required to contain these new eco-refrigerants.
Double-walled brazed carbon steel construction permits operating ranges exceeding 100 bar, safeguarding refrigeration lines from compressor vibrations.
Utilizing high-purity copper sleeves and precision automated machining, our fittings deliver bubble-tight connections that eliminate refrigerant emissions.
Engineered with electrolytic copper plating, hot-dip zinc coatings, or PVF treatments to withstand industrial environments and moisture condensation.
Continuous process optimization via high-precision production machinery and automated visual inspection systems.
Moisture, acid, and solid particulate matter are the three primary causes of compressor failure and thermodynamic degradation in cooling systems. Taojun’s copper filter driers are designed to eliminate these factors.
| Component Group | Material Specification | Key Performance Parameter | Industrial Standard Compliance |
|---|---|---|---|
| Outer Shell Body | TP2 High-Purity Copper / Bundy Carbon Steel | Min. Wall Thickness 0.75mm; Operates up to 500 PSI | ASTM B75 / ASTM B280 |
| Inner Desiccant Core | 3A Molecular Sieve (80%) + Activated Alumina (20%) | Water Absorption Capacity ≥ 22% at 25°C | ARI Standard 710 |
| Filtration Barrier | Multi-layer Stainless Steel Mesh (100+ mesh) | Filters solid debris down to ≤ 20 microns | ISO 14963 |
| Connecting Sockets | Premium Extruded Brass H59/H62 | Argon-arc/Helium brazed joint integrity | GB/T 1804 Class-M Tolerances |
Hermetic Sealing Protocol: Every copper filter drier we manufacture undergoes hermetic end-spinning and is immediately back-filled with pressurized dry nitrogen. This step prevents ambient moisture from contaminating the molecular sieve during shipping and warehousing, ensuring maximum adsorption capacity when installed.
We perform five main quality checks to ensure reliable field performance:
Ningbo Taojun Refrigeration supports key manufacturing clusters in the Americas, the European Union, Southeast Asia, and domestic hubs. We maintain compliance certifications with international standards boards, including:
Certified under Registration No. 41325Q00065R0S, documenting full traceability from raw copper coils to finished assemblies.
Guarantees all copper alloys, soldering fluxes, and protective finishes are free of lead, mercury, hexavalent chromium, and restricted substances.
Certifies structural integrity and pressure ratings under pressure boundary tests, ensuring safety in commercial applications.
Our sales engineers offer technical consulting to match components with your operating pressures, refrigerant choice, and mechanical layout. We provide automated drawings (STEP/DWG), rapid prototyping within 72 hours, and troubleshooting support with a guaranteed response time of 8 hours.
Our Bundy tube fittings, valves, and filter driers are designed to handle pressure, temperature, and corrosion variables across several key applications:
As global cooling systems become smarter and more integrated, Taojun is developing next-generation HVAC/R components to support this transition:
Common technical questions regarding materials, specifications, and manufacturing tolerances answered by our engineering team.
High-precision brass adapters, capillary coils, and HVAC components engineered for reliable performance.
Taojun