Engineered for extreme performance and certified quality under the ISO 9001 global framework.
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, it 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.
Taojun specializes in refrigeration parts for 38 years. Our core specialties include filter driers, access valves, and condensers. Feature: TAOJUN copper filter driers are designed to absorb moisture and acid, and to filter out impurities. Normally, they are installed as a component and replaced as a repair part for both domestic and commercial refrigerators and freezers.
Years of Engineering Heritage
Year of Establishment
Countries Exported Globally
USTC/ZJU PhD Researchers
How regulatory standards and technological milestones are redefining split valve configurations globally.
The global Heating, Ventilation, Air Conditioning, and Refrigeration (HVAC/R) industry is undergoing a structural paradigm shift. At the heart of this evolution is the AC Split (Splte) Valve—an indispensable control element that connects outdoor condensers to indoor evaporator units. As global temperatures rise and green building standards tighten, split valves must withstand higher pressures, maintain absolute hermetic seals, and prevent hazardous refrigerant leaks.
One of the primary trends is the global transition to high-pressure, eco-friendly refrigerants. Hydrofluorocarbons (HFCs) like R410A are systematically phased out in favor of low-Global Warming Potential (GWP) alternatives, including R32, R290 (propane), and CO₂. Since these refrigerants operate under drastically different temperature-pressure curves, manufacturers of AC split valves must redesign physical core seals, valve bodies, and internal gaskets. For instance, R290 split valves demand explosion-proof layouts and ultra-low leakage thresholds, whereas CO₂-based systems require components capable of managing operating pressures exceeding 120 bar.
Concurrently, automation within split valve production has evolved from a differentiator to a baseline requirement. Modern factories leverage CNC machining hubs and automated assembly systems coupled with CCD (Charge-Coupled Device) visual alignment to eliminate minor structural deviations. In the realm of material science, deoxidized high-phosphorus copper (C12200) and lead-free forging brass have emerged as industry standards, optimizing physical tensile strength and preventing localized dezincification in highly corrosive environments.
Deciphering key operational parameters required by international commercial procurement executives.
International OEMs face severe regulatory scrutiny. Products must strictly align with the EU's RoHS directive, REACH parameters, and North American UL safety rules. Securing certified parts ensures friction-free customs clearance and downstream market acceptance.
Modern HVAC networks cannot tolerate refrigerant depletion. Enterprise buyers evaluate the leakage prevention mechanism, prioritizing technologies like helium mass spectrometer leak detection (boasting leak rates below 1x10⁻⁸ mbar·l/s) to ensure long-term stability.
Sourcing teams prioritize vendors capable of scaling production on demand. With MES-enabled digital workshops, factories can track material flow in real-time, matching standard catalog orders and specialized OEM blueprints with precise dispatch timelines.
How our manufacturing precision and quality metrics support your distribution framework.
Our core manufacturing equipment is imported directly from Germany, ensuring precise machining parameters and consistent cycle times for all product classes.
We have 15 engineers in our R&D centre, all of whom are doctors or professors from the prestigious University of Science and Technology of China (USTC) and Zhejiang University.
Customized sizes, specialized port geometry, and custom material compositions are available. Share your operational criteria, and our engineering team will co-develop the solution.
Our ITO film (no shrinkage, no color difference) and liquid crystal spacer (excellent uniformity) are imported directly from Japan; our liquid crystal temperature range is 70°C and protective film resists high temperatures of 80-90°C.
Finished Products Testing: High & low temperature test at 75°C and -35°C for 500 hours; thermal shock test 10°C-90°C for 30 minutes; damp heat test for 500 hours; moisture removed by oven; smart films in sheet are powered by a 24-hour aging test; smart films in roll are tested with 100V high voltage to make sure zero breakdown.
Featuring ±0.02mm aluminum foil tolerance, multi-stage filtration capabilities, and 10-year design lifespan testing, ensuring reliability under rugged use cases.
We believe global brands are built upon an unyielding dedication to corporate culture, technical excellence, and scientific manufacturing methodologies. The development of our group is guided by our core values: Honesty, Innovation, Responsibility, and Cooperation.
WorkShop
Product Line
Lab
Expansion of our factory building footprint to support growing HVAC market requirements.
Implementation of the MES intelligent workshop management system, optimizing manufacturing transparency.
Upgrade of precision measurement capabilities and automated assembly cells for low-GWP refrigerant components.
Enabling carbon neutrality through low-emission components and modular engineering designs.
The HVAC/R industry is prioritizing system decarbonization and intelligence. Standard components are transitioning to smart units integrated with sensors that capture system flow parameters and pressure deviations in real-time. This predictive maintenance model prevents catastrophic system failure and preserves energy efficiency ratios (EER).
Over the next five years, our technical development path focuses on three core areas:
TAOJUN copper filter driers are engineered to protect refrigeration systems by eliminating contaminants and moisture before they reach precision expansion mechanisms.
Official registration and manufacturing validation documents.
Ningbo Taojun Refrigeration Equipment Co., Ltd. operates under registration number 41325Q00065R0S, verifying compliance with the GB/T19001-2016/ISO9001:2015 standard. This certification spans the development and manufacturing of refrigeration system parts, including copper filter driers, condenser assemblies, and access valves.
Main Certificate Document
Detailed Scope of Certification
System Registration Certificate
Laboratory Approval
ISO 9001 Compliance
Production License
Compliance Certificate
Where our custom HVAC/R solutions are deployed globally.
Expert technical insights regarding AC split valves, manufacturing, and international procurement.
Direct access to our certified components and custom manufacturing pipelines.
Over 38 years of research and development ensures that our complete range of HVAC and plumbing solutions exceeds project specifications.
The product sales network of Ningbo Taojun covers major and medium-sized cities in China, and our components are exported to Europe, the Americas, South America, Southeast Asia, the Middle East, Africa, and other overseas markets. The company's goal is to support and cooperate with every customer to achieve a mutually beneficial, win-win outcome.
Taojun