Explore our leading precision-engineered line of copper fittings, brazed assemblies, and custom filtering components.
Founded in 1988, the predecessor of Ningbo Taojun Refrigeration Equipment Co., Ltd. was the esteemed Xiangshan Refrigeration Accessories Factory of Zhejiang University. Rooted in rigorous academic engineering and advanced materials research, we have spent over three decades establishing ourselves as a global force in the manufacturing of refrigeration parts and mechanical joint solutions.
Today, Taojun operates as a comprehensive, national high-tech enterprise. We integrate custom research and development, smart manufacturing, and comprehensive post-purchase support. Our product range specializes in copper brazing alloy components, filter driers, check valves, air conditioning service valves, high-pressure condensers, brass and copper structural fittings, and outdoor mount installations under our renowned "Lingshan" and "Taojun" brands.
Watch Our Factory in Action: From raw copper raw materials to automatic brazing, precision tube extrusion, and testing in our high-vacuum environments, check out the industrial processes that guarantee 99.9% leak-proof reliability for domestic and industrial refrigeration units.
Navigating materials science advances, regulatory mandates, and automated production demands in HVAC/R system joining.
Global environmental mandates, including RoHS and REACH, have driven the industry to phase out toxic additions. Modern formulations utilize refined phosphor-copper and silver-bearing variants that secure robust joints without environmental or health liabilities during installation.
To eliminate variability in manual torch operations, mass production facilities are adopting automated induction brazing. High-precision preformed alloy rings and wire shapes ensure consistent volume delivery, minimal oxide formation, and zero-defect capillary action.
For copper-to-copper brazing, the phosphorus content acts as an integrated deoxidizing agent. This eliminates the necessity for external fluxes, prevents acid buildup, minimizes system contamination, and speeds up the assembly line cycle.
Taojun’s copper filter driers and connection assemblies are custom engineered to solve moisture, solid particle, and acid contamination within refrigeration cycles.
Our commitment to precision is backed by high-tech infrastructure and an elite engineering network:
Securing supply chains, optimizing material costs, and achieving regulatory compliance for international OEM and industrial clients.
Leading appliance conglomerates like Haier, Midea, Whirlpool, Electrolux, and Gree require consistent parts supply. Our high-capacity factories in Ningbo feature MES intelligent control systems to guarantee short lead times, stable material costs, and scalable production schedules.
The global transition to eco-friendly refrigerants (like high-pressure R32, R290, and CO2 systems) demands robust mechanical joints. Our brazing alloys and copper filters are engineered to withstand higher system burst pressures, ensuring long-term operational safety.
We support fully customized dimensions, capillary tube entries, connection diameters, and integrated screening meshes. Our quick prototype validation capabilities shorten R&D cycles for new refrigeration designs.
Verified regulatory conformity ensuring seamless logistics, simple import procedures, and liability protection across continents.
Operating across diverse jurisdictions in North America, the European Union, South America, and APAC requires robust regulatory compliance. Ningbo Taojun Refrigeration Equipment Co., Ltd. has established a comprehensive compliance and quality management system to support global logistics and manufacturing standards.
Our manufacturing processes are certified under GB/T19001-2016 / ISO9001:2015 (Registration No.: 41325Q00065R0S), ensuring strict quality control from raw material receipt to final cargo packaging. Furthermore, all materials comply with the EU’s RoHS Directive, REACH Regulations, and carry the necessary US UL approval for pressurized vessel configurations.
For global purchasing managers, we offer comprehensive trace documentation, customs classification codes, material composition certificates, and direct assistance for tariff declarations.
GB/T19001-2016 / ISO9001:2015 Registration
Certified Design & Manufacturing Scope
Direct consulting with expert engineers, 24/7 hotline response, and tailored technical specifications for customized brazing alloy configurations.
One-year warranty with complimentary lifetime technical support, automated troubleshooting assistance, and replacement part supply.
Complete compliance with JIS, DIN, ASTM, and EN manufacturing standards for seamless global system integration.
Over 35 years of manufacturing excellence, process automation, and continuous technological expansion.
Founded as the Xiangshan Refrigeration Accessories Factory of Zhejiang University, establishing our technical and academic foundation in cooling materials science.
Expanded manufacturing facilities, building new production shops to accommodate growing domestic demands for copper components.
Integrated the MES Intelligent Workshop Management System and advanced machinery, significantly reducing manufacturing lead times and component defect rates.
Modernized our manufacturing line and expanded global exports, supplying high-performance copper brazing products to customers in over 50 countries.
Technical guidance from our engineering department regarding brazing alloy selection, application techniques, and joint reliability.
Phosphor-copper alloys (typically containing 5% to 8% phosphorus) are self-fluxing when used to join copper-to-copper components. The phosphorus reacts to form a protective phosphate barrier, preventing oxidation during heating. However, when joining copper to brass, bronze, or steel, an external flux is required. Adding silver (typically 2%, 5%, or 15%) lowers the alloy's liquidus temperature, improves electrical conductivity, and significantly increases joint ductility, making the connection highly resilient to operational vibration and thermal cycling.
Refrigeration filter driers operate in highly demanding environments with constant vibration, pressure fluctuations, and potential moisture exposure. Standard brass alloys are vulnerable to stress corrosion cracking over time. Using high-purity, oxygen-free copper shells guarantees excellent thermal conductivity, easy brazing, resistance to oxidation, and robust hermetic joints capable of withstanding system pressures up to 45 bar or higher.
Brazing failures are typically caused by insufficient capillary action, surface oxides, overheating, or inadequate joint clearance. To prevent failures: 1. Ensure a joint clearance of 0.05mm to 0.15mm to optimize capillary pull. 2. Thoroughly clean the joining surfaces to remove grease, dirt, and oxide films. 3. Purge the piping with nitrogen gas during brazing to prevent the formation of internal copper oxides. 4. Select a brazing alloy with the appropriate solidus/liquidus range for your specific torch or induction heating setup.
All our copper brazing alloys, filter driers, and brass fittings are formulated without cadmium, lead, or other hazardous materials banned by RoHS and REACH directives. Our manufacturing facility uses clean gas-shielded furnace lines and induction heating, eliminating toxic fumes and ensuring the safety of installation technicians and the environment.
Yes. Supported by our R&D team and modern tooling shop, we specialize in OEM/ODM design. We can customize outer shell lengths, wall thicknesses, inlet/outlet capillary inner diameters, screen meshes, and custom preformed ring shapes. We can deliver tailored prototype designs within 72 hours based on your technical drawings.
Ensure long-term system reliability with our field-tested refrigeration valves, adapters, condensers, and filters.
Taojun
