Founded in 1988, Ningbo Taojun Refrigeration Equipment Co., Ltd. (formerly the Xiangshan Refrigeration Accessories Factory of Zhejiang University) has spent nearly four decades solidifying its position as a global leader in high-precision refrigeration accessories. Situated in the industrial manufacturing hub of Xiangshan, Ningbo, our facility specializes in state-of-the-art HVAC components including copper/brass filter driers, check valves, air conditioning valves, condensers, brass and copper accessories, and related refrigeration systems.
Recognized as a National High-Tech Enterprise in 2021, Taojun represents a perfect synthesis of academic research and advanced manufacturing. By collaborating with elite institutions like the University of Science and Technology of China (USTC), we continually push the limits of thermal dynamics, metallurgical precision, and flow control systems. Our premium "Lingshan" brand filter driers have set domestic benchmarks, earning certifications such as ISO9001:2015, IATF 16949, CE, RoHS, and US UL.
Currently, our manufacturing and testing divisions operate with a defect rate of under 0.05%, facilitating critical partnerships with leading OEMs globally, including Haier, Midea, Gree, Whirlpool, Electrolux, and Huarui.
Leveraging 38 years of metallurgical expertise, we engineer advanced products designed to absorb moisture, eliminate acid, and filter trace impurities in high-pressure thermodynamic systems.
TAOJUN copper filter driers are designed to absorb moisture and acid, and to filter out impurities. Normally installed as a component and replaced as a repair part for both domestic and commercial refrigerators, freezers, and industrial HVAC chillers.
We fabricate premium copper accumulator pipes, 90-degree elbows, custom extruded brass fittings, and Bundy tubes designed to withstand extreme vibration and thermal shock, ensuring leak-free performance.
Our product lines include advanced access service valves, check valves, condenser systems, and dynamic mechanical parts designed to regulate refrigerant flow and sustain high pressures over long service lifespans.
Analyzing the raw material supply chains, metallurgical expertise, and state-of-the-art automation infrastructure that place Ningbo Taojun at the forefront of the global market.
To guarantee dimensional consistency, our core production equipment is imported directly from Germany, utilizing advanced CNC machinery and automated brazing stations. Our raw materials are globally sourced: premium liquid crystal spacers and ITO films are imported directly from Japan, while advanced high-performance sealants are sourced from European partners.
By integrating an enterprise-wide MES (Manufacturing Execution System), we achieve complete vertical traceability from raw copper ingots to finished, hermetically sealed filter driers.
Our zero-defect methodology incorporates strict environment testing protocols. Every product model undergo thermal shock testing (from 10°C to 90°C), continuous high & low temperature aging tests (-35°C to 75°C for 500 hours), and high-pressure damp heat verification.
For smart films and electrical connections, we run 100V high-voltage insulation tests to prevent electrical breakdown, and verify copper joints using precise helium mass spectrometer leak detection.
The reliability of brass connections and copper filter driers in cooling systems is highly dependent on metallurgical purity. Trace impurities in copper tubes can result in micro-porosity under high pressure, leading to refrigerant leaks.
We supply components designed to withstand harsh operating conditions across a wide range of global industries.
Providing refrigerator and freezer manufacturers with customized copper alloy capillary tubes, access valves, and filter driers that ensure stable, long-term refrigeration cycles for home appliances.
Engineering robust copper accumulators, high-strength brazing alloys, and large-capacity molecular sieve driers capable of handling high fluid velocities and system pressures.
Supplying temperature-resistant aluminum filter driers and custom brass connections optimized to withstand high vibration and temperature fluctuations in automotive and transport refrigeration units.
Today's procurement managers face challenges including volatile raw material costs, supply chain bottlenecks, and stringent environmental mandates. Ningbo Taojun offers a reliable manufacturing partnership structured to resolve these issues:
✓ GB/T19001-2016 / ISO9001:2015 certified production lines.
✓ Direct material compliance with EU RoHS & REACH standards.
✓ Underwriter Laboratories (UL) listed components for North American integration.
✓ Traceable MES quality tracking across all production stages.
Key developments transforming the global refrigeration connection and filtration landscape.
The global shift toward low-GWP (Global Warming Potential) refrigerants like R290 (Propane) and CO2 (R744) requires filter driers and brass fittings designed to operate at higher working pressures and handle unique gas densities.
Future HVAC systems will rely on smart components. The integration of colorimetric indicator elements in filter driers helps identify system moisture levels before moisture causes compressor failure.
With environmental agencies penalizing trace refrigerant leaks, manufacturers require brass fittings with micro-tolerance finishes (within ±0.02mm) and reliable thread geometries.
A timeline of growth, from a local refrigeration accessories factory to a national high-tech manufacturing enterprise.
Foundation: Established as the Xiangshan Refrigeration Accessories Factory, operating in close collaboration with the engineering department of Zhejiang University.
Manufacturing Upgrades: Implemented the MES intelligent workshop management system, transitioning our manufacturing lines to digital data tracking.
Global Expansion: Upgraded our automated production lines and expanded our OEM/ODM partnership network to cover over 50 countries.
Our GB/T19001-2016/ISO9001:2015 certification (Registration No.: 41325Q00065R0S) guarantees traceable quality standards for our clients worldwide.
Official GB/T19001 standard verification document.
Verification covering filter driers, condensers, and access valves.
Approved testing facility for safety and performance compliance.
Detailed information on our customization capabilities, quality control processes, and global order fulfillment.
Taojun