Browse our wholesale inventory of high-quality components manufactured using state-of-the-art precision equipment.
Ningbo Taojun Refrigeration Equipment Co., Ltd. is strategically located in Xiangshan, Ningbo, a prominent center of industrial excellence in China. Established in 1988, our roots trace back to the prestigious Xiangshan Refrigeration Accessories Factory of Zhejiang University. This academic foundation has fueled our commitment to research, design, and manufacture of elite refrigeration and HVAC solutions for over three decades.
As a national High-Tech Enterprise recognized in 2021, Taojun specializes in the engineering of high-purity copper filter driers, check valves, industrial access valves, condensers, brass connectors, and HVAC propress accessories. Our globally known brand "Lingshan" has set quality standards domestically and is quickly scaling across key international markets.
High durability, fast heating dissipation, and leak-proof sealing are engineered into each condenser, capillary tube, and valve that leaves our assembly line.
We leverage 99.9% pure copper pipes resistant to rust and internal oxidation. This material ensures optimal thermal conductivity, stability, and compatibility with modern eco-friendly refrigerants.
Our filter driers incorporate premium 3A molecular sieves coupled with activated carbon layers. This dual-action core delivers moisture absorption efficiency ≥20% while eliminating acid and impurities from the refrigeration loop.
Argon arc welding processes and helium mass spectrometry leak testing ensure zero leak rates. Every propress fitting and valve is engineered to withstand pressures up to 500 PSI.
How modern HVAC press-fit and copper components operate across diverse environmental demands and project types globally.
In residential retrofits across North America and Europe, traditional torch-brazing is fast being replaced by press-fit technology. Our capillary tubes, copper tee junctions, and universal control systems enable swift, flame-free connections. This minimizes installation time and eliminates the risk of internal oxidation, which often blocks critical expansion valves.
Multi-split systems in modern office towers require thousands of secure joints. Taojun copper filter driers and triple-sealed valves are engineered to support long refrigerant runs with high operating pressures. Our copper manifolds deliver reliable refrigerant flow division without the structural micro-cracks common in hand-brazed joints.
Food storage and pharmaceutical preservation facilities require hermetic components capable of handling high temperature swings. Our molecular sieve filter driers absorb moisture in R404A and R507 commercial freezers, ensuring the low-temperature environment remains acid-free to protect the compressor unit.
As the HVAC industry undergoes transformations driven by global decarbonization and smart automation, Taojun Refrigeration is leading development along three strategic technological routes:
1. Compatibility with Low-GWP Eco-Refrigerants: The global transition to R32, Propane (R290), and CO2 requires components that can withstand much higher operating pressures and specialized lubrication fluids. We are redesigning our copper capillary coils, Bundy tubes, and filter driers to accommodate these new compounds safely.
2. Flame-Free Propress & Quick-Connect Integration: We are scaling up our CNC tooling capacity to produce industry-standard propress copper fittings. These press-fit technologies rely on precision-molded EPDM or HNBR O-rings, removing the need for open flame torches on construction sites, lowering labor costs, and boosting jobsite safety.
3. Smart, Sensor-Enabled HVAC Filtration: Our R&D team, collaborating with top-tier universities, is prototyping smart filter driers featuring internal moisture sensor indicators. These components will alert building management systems when the desiccant core is reaching saturation, shifting maintenance from reactive to predictive.
Why partnering with Ningbo Taojun ensures security of supply, cost advantages, and quick scaling for global distributors.
Located in the heart of Ningbo's industrial zone, our factory enjoys immediate access to high-purity copper refineries, logistics nodes, and deepwater shipping terminals. This proximity keeps transport costs down and ensures a constant stream of raw materials.
From copper tube drawing and extrusion to assembly, argon arc welding, molecular desiccant packing, and final helium testing, we maintain complete control over the entire supply chain. By managing every stage internally, we can easily bypass raw material shortages.
Our integrated MES (Manufacturing Execution System) monitors and tracks every production batch. Coupled with imported German tooling and automated CCD visual inspection systems, we can guarantee consistent quality, even for high-volume orders.
The global HVAC and refrigeration industries are facing pressure from two main sources: strict environmental regulations and skilled labor shortages. Environmental directives like the European F-Gas regulations and the US EPA AIM Act are phasing out older high-GWP refrigerants. This change requires systems to transition to newer refrigerants, which need highly reliable, leak-free copper joints and filters.
At the same time, finding skilled HVAC technicians is becoming more difficult. Distributors are turning to simplified connection systems like copper propress fittings, which reduce human error and speed up installation times by up to 60%. As a trusted OEM/ODM partner, Taojun helps global brands quickly expand their portfolios with high-quality, pre-certified copper fittings and accessories.
Ensuring global compliance and reliable performance in every major geographic market.
Ningbo Taojun holds official GB/T19001-2016/ISO9001:2015 certification (Registration No: 41325Q00065R0S). In addition, our product lines are certified to meet European EU RoHS, REACH, and US UL standards, ensuring smooth entry into demanding international markets.
Our products undergo thorough quality testing, including 500-hour high/low temperature tests (ranging from 75°C to -35°C), thermal shock testing (10°C to 90°C for 30 minutes), and damp heat testing. All smart sheets are backed by a 24-hour active aging test to ensure reliable field performance.
We provide full-lifecycle technical support, with pre-sales engineering consulting and responsive after-sales service within 8 hours. Customers benefit from our team's 15+ years of pump and refrigeration experience, as well as a full 1-year product warranty.
ISO 9001 Certificate
Scope of Certification
Factory Quality Compliance
Honesty: We prioritize integrity and build long-term, reliable relationships with partners around the world.
Innovation: Innovation drives our progress. We constantly update our concepts, tooling, manufacturing processes, and management frameworks.
Responsibility: We hold ourselves to high standards of quality, ensuring our components perform reliably to protect systems and the environment.
Cooperation: We collaborate with clients, research institutions, and raw material suppliers to create win-win opportunities across the global supply chain.
Get professional insights from our engineering and manufacturing teams on key technical details.
A: Propress fittings create a secure connection without using an open flame, eliminating fire risks on construction sites. They reduce installation times by up to 60% and prevent internal carbon build-up, which can contaminate system components and cause compressor damage.
A: Our filter driers feature 3A molecular sieves that absorb moisture and impurities down to low PPM levels. By trapping moisture, they prevent acid formation in the refrigeration loop, protecting copper components from corrosion and preventing compressor motor burnouts.
A: Yes, our high-purity copper shells, copper fittings, and triple-sealed valves are engineered and tested to operate safely under high-pressure conditions up to 500 PSI, making them compatible with modern eco-friendly refrigerants.
A: Every batch undergoes rigorous quality checks, including 500-hour high/low temperature testing (-35°C to 75°C), thermal shock testing (10°C to 90°C), and helium leak detection to ensure reliable, leak-free operation in the field.
A: We offer full custom support, including modifying shell diameters, inlet/outlet sizes, and configurations for filter driers, capillary coils, and check valves to match your specific system requirements. Our R&D center is ready to collaborate on custom designs.
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