Explore our premium grade refrigeration parts, custom-manufactured for high-efficiency commercial and residential HVAC systems.
Founded in 1988, Ningbo Taojun Refrigeration Equipment Co., Ltd. is located in Xiangshan, Ningbo, a world-class manufacturing hub. Originating as the Xiangshan Refrigeration Accessories Factory of Zhejiang University, we carry a legacy of scientific precision and continuous industrial innovation.
Over the last 35+ years, we have emerged as a high-technology enterprise specializing in the R&D, design, manufacturing, and global distribution of high-performance refrigeration components. Our primary range includes copper filter driers, check valves, service access valves, condenser assemblies, copper/brass fittings, and climate installation kits.
Driving the evolution of sustainable refrigeration. How we align copper filter drier designs with global eco-mandates.
Modern HVAC networks are rapidly transitioning to eco-friendly refrigerants with ultra-low Global Warming Potential (GWP) such as R32, R290 (Propane), and R744 (CO₂). Taojun driers are optimized with specifically formulated 3A molecular sieves that prevent refrigerant adsorption and maximize chemical stability under high-pressure dynamics.
Micro-channel heat exchangers possess extremely narrow tubes susceptible to particulate clogging. Our multi-stage internal filtration mesh prevents any particulate bypass greater than 50 microns, safeguarding delicate compressor components from friction damage.
Utilizing high-purity phosphorus deoxidized copper (DHP Grade C12200), our components exhibit superior weldability and exceptional resistance against atmospheric oxidation and stress-corrosion cracking, rendering them ideal for heavy marine or coastal air-conditioning operations.
Our infrastructure matches global Industry 4.0 requirements. By utilizing a central MES (Manufacturing Execution System), we maintain complete batch traceability for all raw materials, stamping pressures, brazing temperatures, and pneumatic leak test profiles.
Our core production equipment is imported directly from high-precision German manufacturers, allowing us to maintain a machining tolerance limit of ±0.02mm. This eliminates installation issues for both manual field repairs and automated OEM factory lines.
Comprehensive Material Sourcing: To ensure high structural integrity, all internal desiccants and filters feature premium molecular sieves showing moisture absorption rates ≥20%. Special liquid crystal polymer adhesives and protective films are procured from leading Japanese suppliers to ensure resistance to continuous thermal stress.
Intelligent Stamping Workshop
High-Speed Spinning & Assembly Line
Testing Lab & Cleanliness Validation
Helping procurement directors minimize down-time and streamline component integration with strategic OEM/ODM delivery schedules.
Providing high-volume industrial copper filter cartridges designed specifically to capture micro-impurities and prevent capillary freeze-up in fast-cycling commercial ice production environments.
Double-inflow copper filter driers engineered for reverse-cycle heat pumps, facilitating smooth refrigerant drying in both heating and cooling operation modes without requiring bypass solenoid check valves.
Compact, vibration-resistant receiver-driers designed to withstand high mechanical shock, keeping mobile AC circuits clean under severe ambient heat loads.
We are fully certified to export our high-precision air conditioning fittings and copper filter driers worldwide. We comply with major international directives, providing your supply chain with risk-free customs clearance and premium local validation:
ISO 9001 Document
Certified Quality Scope
Technical insights and answers about copper filter driers, access valves, and refrigeration maintenance.
Refrigeration loops are highly sensitive to moisture, acid, and solid particulate build-ups. If moisture combines with ester-based oils (POE) or halogenated gases, it creates corrosive acids that ruin compressor motor insulation. Copper filter driers act as the first line of defense, physically trapping dirt and chemically bonding with trace moisture via molecular sieves to ensure stable cooling.
We strictly utilize 3A molecular sieves (pore size of 3 Angstroms) for our HVAC driers. 3A molecular sieves are optimized to absorb water (diameter ~2.8 Angstroms) while excluding refrigerant molecules like R134a, R32, or R290. Using a larger 4A pore structure would lead to the co-adsorption of refrigerant, leading to localized heating, reduced drying efficiency, and premature breakdown of the desiccant matrix.
Our testing protocol includes dynamic thermal shock trials (ranging between -35°C and 75°C for 500 hours), helium mass spectrometer leak detection down to 1x10⁻⁸ mbar·l/s, and mechanical high-voltage testing of protective elements. This keeps our batch failure rate below 0.05%, which is critical for volume OEM partnerships.
Yes. We specialize in custom-tailored solutions for global HVAC/R OEM companies. We can alter diameter specifications, inlet/outlet fitting sizes (sweat, ODF, SAE flare), physical casing lengths, and molecular sieve volume (10g, 15g, 20g, and larger) to fit your system design parameters.
Premium components engineered to protect refrigeration systems, increase heat-exchange efficiency, and prolong compressor life.
Taojun
