Direct from our ISO 9001 certified smart factory. Optimized structural integrity for long-term sealing & system safety.
Ningbo Taojun Refrigeration Equipment Co., Ltd. is located in Xiangshan, Ningbo, a beautiful tourist city. Founded in 1988, its predecessor was Xiangshan Refrigeration Accessories Factory of Zhejiang University. The company's leading products include: filter driers, check valves, air conditioning valves, condensers, brass and copper accessories, air conditioning cable ties and other refrigeration accessories series products. After 30 years of hard work and rapid development, it has now become a comprehensive enterprise integrating the design and development, production and sales, and after-sales service of refrigeration accessories.
In 2021, we became a national high-tech enterprise. Our company is committed to technological and process innovation, equipment improvement, and the introduction of advanced management concepts to produce first-class products. Customer satisfaction is our unwavering pursuit. With reasonable design, reliable quality, and perfect after-sales service, the "Lingshan" filter has become a well-known brand in the domestic refrigeration industry. The company has successively passed ISO9001:2008 quality management system certification, EU ROHS environmental protection directive certification, and US UL certification. The company always takes customer needs as the basis and continuously innovates management concepts to ensure efficient and stable development.
In 2012, Ningbo Taojun Refrigeration Equipment Co., Ltd. was established, creating the brand "Taojun" condensers, "Taojun" stop valves and other series of products. Over the years, it has established partnerships with well-known domestic and foreign home appliance enterprises such as Haier, Xinfei, Midea, Gree, Whirlpool, Electrolux, and Huarui. The product sales network covers major and medium-sized cities in China and is exported to Europe, America, South America, Southeast Asia, the Middle East, Africa and other overseas markets.
Take a virtual tour of our modern production line. From raw brass extrusion to automatic argon-arc sealing and 100% helium leakage detection systems, observe how quality is manufactured.
Specialized in HVAC/R components for over 38 years. Our filter driers and access valves are engineered to tolerate high-stress environments.
We utilize C37700, CW617N, and HPb59-1 grade brass alongside high-purity deoxidized copper (DHP Grade C12200). These materials prevent dezincification and ensure extreme resistance to cracking under mechanical stresses and rapid temperature cycles.
By effectively removing moisture, acids, and solid particulate matter, our copper filter driers block chemical degradation within the system. They are suitable for both commercial cooling setups and standard household refrigerators.
Our accessories integrate directly into large-scale production cycles or service repair environments. They are widely applied in major household appliance manufacturing, cold rooms, and dynamic climate units.
Our transition to a digital factory paradigm allows Taojun to meet the strict production timelines of international OEMs. At our Ningbo facility, we utilize a fully integrated MES (Manufacturing Execution System). This digital system tracks materials and production stages from raw metal bars to finalized components, providing complete traceability.
Our manufacturing lines feature high-tech machinery imported from Germany. These systems automate the cutting, forging, threading, and degreasing of brass parts. Computer-controlled processes allow us to hold precision tolerances within ±0.02mm. This level of accuracy is critical for ensuring leak-free metal-to-metal seals in environments subject to vibration.
To support this high-precision machining, our raw materials must meet strict purity standards. We import key components, such as high-uniformity liquid crystal spacers and low-shrinkage films, directly from trusted suppliers in Japan and Europe. All process oils, cleaning agents, and brazing fluxes are controlled to ensure copper and brass components remain free of moisture and oxide residues prior to assembly.
Every component undergoes systematic testing to ensure reliable long-term performance under demanding operating conditions:
Providing design-to-delivery support for demanding international market sectors.
Residential and commercial central air conditioning networks require high-strength fittings. Our brass products handle the thermal expansion and contraction cycles common in split and multi-zone VRF systems, helping prevent refrigerant loss over years of service.
Cold chain logistics and supermarket display freezers require stable internal temperatures. Taojun manufactures copper filter driers with dense activated carbon and molecular sieve configurations to prevent acid buildup and moisture freezing in capillary systems.
Automotive AC systems face continuous vibration and varying road conditions. Our brass and copper fittings are designed to resist mechanical fatigue. We match the specifications of global automotive sub-assemblies to provide consistent connection security.
Environmental regulations are accelerating the phase-out of traditional hydrofluorocarbons (HFCs). Systems are shifting toward natural refrigerants like Propane (R290) and Carbon Dioxide (R744/CO2). These refrigerants operate at higher pressures and require careful material compatibility.
Taojun's engineering department works with university labs to develop brass fittings that handle these elevated operating pressures. By refining grain structures and thread designs, we ensure our connectors maintain a reliable seal under high-pressure conditions.
Our product roadmap focuses on supporting system efficiency and environmental compliance. We are developing lead-free brass alternatives to meet changing drinking water and chemical safety standards worldwide. Our engineering team is currently testing lead-free brass formulations that match the machinability and corrosion resistance of standard alloys.
We are also working to optimize flow dynamics within our fittings. By refining internal profiles, we can reduce flow resistance and turbulence. Even minor reductions in pressure drop help lower system energy consumption, contributing to overall efficiency goals.
Through our partnership with the University of Science and Technology of China, we continue to research surface treatment technologies. Our goal is to develop treatments that improve corrosion resistance without compromising the thermal conductivity of our copper and brass assemblies.
Juntao Refrigeration provides verified compliance and documentation to support international distribution.
Registration Certificate
Detailed Scope Page
Our official quality standard validation is registered under GB/T19001-2016 / ISO9001:2015 (Registration No: 41325Q00065R0S). This verification covers our complete system for designing and manufacturing filter driers, condensers, and access valves.
This registration can be verified through China's CNCA system (www.cnca.gov.cn) or our audit partner Zhongci International (www.zcgirz.com). This third-party verification helps simplify the compliance process for our importing partners.
All fittings comply with EU RoHS environmental standards. We limit hazardous materials to ensure safe disposal and recycling at the end of the product's life cycle.
Our refrigeration accessories undergo pressure and temperature testing to meet UL safety requirements for pressurized components.
Our copper filter driers and access valves are certified to meet European safety and performance standards for pressurized systems.
We monitor chemical compositions to ensure alignment with REACH regulations, avoiding restricted substances in our manufacturing processes.
Technical information and buying considerations for industrial purchasers and engineers.
We primarily use C37700, CW617N, and HPb59-1 brass alloys. These materials are formulated with specific copper-to-zinc ratios and small amounts of alloying elements that inhibit dezincification. This helps prevent structural degradation in moist environments, preserving the mechanical strength of the fitting.
Our manufacturing process includes an automated, multi-stage degreasing wash. This process removes trace cutting oils, oxides, and particulate residues, keeping internal surfaces clean. This step is critical for avoiding reactions with modern refrigerants and synthetic polyolester (POE) oils, helping to prevent capillary blockages.
For standard customized configurations, our typical production cycle is 15 to 25 days, depending on order size. We offer prototype validation and technical design support, with first-article testing samples usually available within 7 to 10 working days.
We conduct burst tests and cyclic fatigue testing to verify pressure ratings. Components designed for high-pressure refrigerants like R744 (CO2) are built with thicker walls and reinforced profiles to ensure they meet standard safety factors.
Explore our full range of refrigeration components, including filters, access valves, and connecting fittings.
Taojun