The critical role of solid-core and molecular sieve copper filter driers in modern refrigeration, heat pump, and HVAC/R loops.
Liquid line filter driers are the primary defense mechanism against system moisture, which chemically reacts with refrigeration oil to form corrosive organic acids. The integration of high-density 3A molecular sieves prevents ice blockage at the expansion valve and protects compressors from early mechanical breakdown.
With the global push toward R290, R32, CO2 (R744), and HFO refrigerants, systems operate at higher working pressures and display distinct chemical profiles. Advanced copper filter driers must offer increased shell burst pressure and targeted adsorption pore sizes to maintain long-term stability.
Every commercial and domestic refrigeration unit must balance particulate filtration against pressure drops. A minimal drop in liquid pressure ensures the expansion device operates at maximum efficiency, preventing flash gas formation and securing optimized energy utilization indexes.
Founded in 1988, the predecessor of our company was the Xiangshan Refrigeration Accessories Factory of Zhejiang University. Today, Ningbo Taojun has evolved into a national high-tech enterprise integrating premium design, manufacturing, and global commercial trade of critical refrigeration accessories.
Located in Xiangshan, Ningbo, our facility covers comprehensive production lines including copper filter driers, check valves, condenser systems, brass and copper accessories, and air conditioning line sets. Our famous brand "Lingshan" and our global engineering brand "Taojun" are synonymous with high-quality and reliability in HVAC/R components.
Why Taojun leads China's HVAC component factories in engineering efficiency and product consistency.
Our core production systems are imported directly from Germany, enabling high-speed copper cutting, precise orbital shaping, and automated internal desiccant filling under cleanroom-equivalent atmospheres.
Our research and development center features 15 highly qualified engineers, including doctoral researchers and professors from the University of Science and Technology of China (USTC) specializing in fluid dynamics and thermal properties.
Our premium raw materials are imported from trusted global suppliers. The specialized ITO film is imported directly from Japan for excellent uniformity and zero color shift, while our liquid crystal matrices and high-temp protective films resist up to 80-90°C.
Every batch of copper capillary tubes, desiccant materials (3A molecular sieves), and steel shells must pass spectral analysis. Filters must maintain a high purity internal environment to prevent oil acidification and compressor burnout.
Our finished products undergo strict thermal tests. High & low temperature testing is performed at 75°C and -35°C for 500 consecutive hours. Thermal shock runs between 10°C to 90°C for 30 minutes, followed by helium mass spectrometer leak detection ensuring zero breakdown at 100V equivalence.
Understanding the internal structure and raw materials is key to specifying the right component for long-term system health.
| Component Type | Body Length | Core Desiccant Weight | Recommended Refrigerants |
|---|---|---|---|
| Copper Drier 10g | 90-110 mm | 10 grams (3A Sieve) | R134a, R600a, R290 |
| Copper Drier 15g | 115-135 mm | 15 grams (3A Sieve) | R134a, R404a, R600a |
| Copper Drier 20g | 130-150 mm | 20 grams (Dual Core) | R134a, R410A, R407C |
| Copper Drier 30g | 150-180 mm | 30 grams (Dual Core) | Commercial HVAC Loops |
From consumer household appliances to complex cold chain logistics and manufacturing loops.
Standard 10g and 15g copper drying filters are placed in the liquid lines of home freezers and refrigerators to keep capillary tubes clear of moisture blocks.
Larger solid-core filter driers installed in supermarket display cabinets and walk-in cold storage facilities to protect scroll compressors from oil damage.
Specially engineered vibration-resistant receivers and filter driers built to withstand consistent vehicular vibration and rapid environmental changes.
Heavy-duty steel shell and demountable core filter driers designed for large scale factory water chillers, plastic molds, and process cooling.
Quality and precision are the key priorities at Taojun. Our facility operates strictly under the GB/T19001-2016/ISO9001:2015 quality management system standard (Certificate Registration No. 41325Q00065R0S). This certification, validated via CNCA (China National Certification and Accreditation Administration) and Zhongci International, ensures every batch of filter driers, condensers, and access valves meets global B2B procurement standards.
We are a certified supplier to tier-1 home appliance brands worldwide, including Haier, Midea, Whirlpool, Gree, Electrolux, Huarui, and Xinfei. Our products carry UL certifications for North America, CE marks, and comply with the EU RoHS environmental directive.
Decades of technical evolution, capacity expansion, and strategic partnerships.
Established as Xiangshan Refrigeration Accessories Factory of Zhejiang University. Our original engineering team focused on creating refrigeration accessories to replace expensive imported options.
Introduced our MES intelligent workshop management system. This upgrade linked raw material tracking, automatic cutting, and assembly lines to ensure complete component traceability.
Ningbo Taojun Refrigeration Equipment Co., Ltd. was established to market the "Taojun" brand of condensers, stop valves, and filter driers directly to global manufacturers.
Awarded National High-Tech Enterprise status. We expanded our green manufacturing technologies and added automated optical inspection systems to meet the production demands of the world's leading appliance brands.
Key technical criteria B2B buyers must evaluate when sourcing liquid line filter driers from China.
Ensure the molecular sieve desiccant works properly with your specific refrigerant and compressor oil combination (POE, PAG, or Mineral oils). 3A sieves are standard for HFC/HCFC systems, while custom blends are used for CO2 and ammonia loops.
Standard OD connection diameters must match capillary tube sizes. Specify if you require high-purity copper tails or steel-plated connectors to fit your manufacturing line's automatic brazing equipment.
Filter driers must be securely sealed until installation. Our packaging includes sealed aluminum foil bags and custom plastic plugs to prevent humidity ingress during maritime transit.
Technical and procurement answers from our engineering team.
Taojun
