Explore our advanced OEM/ODM components manufactured with extreme thermal and structural integrity
Within the highly regulated domains of commercial refrigeration, heavy-duty industrial HVACR, and fluid systems, structural integrity at bend joints is paramount. Copper elbows—ranging from standard 90-degree and 45-degree bends to customized return bends and U-tubes—act as core conduits that sustain continuous high-pressure refrigerant cycles. With the global transition toward ecological refrigerants like R410A, CO2 (R744), and Propane (R290), modern piping demands exceptional burst pressure ratings and resistance to hydrogen embrittlement.
As a leading authority in thermal piping design, Ningbo Taojun Refrigeration Equipment Co., Ltd. ensures that our custom copper elbows and specialized refrigeration components comply with strict global standardization guidelines. Utilizing oxygen-free C12200 copper alloy, our components are tested to withstand extreme thermal expansion, cyclical fatigue, and high pressure, preventing system leaks and refrigerant escape.
How technical progress and ecological directives are reshaping copper piping requirements
Modern HVAC systems are shifting to natural and lower GWP refrigerants. This transition demands copper fittings capable of handling pressures exceeding 120 bar, necessitating micro-alloying and strict structural homogeneity.
Advanced automated cold-forming guarantees Wall Thickness Tolerance of ≤ 0.02mm. Precision guarantees consistent brazing clearances at joints, minimizing stress concentration points during service life.
Carbon residue inside lines can react with newer synthetic oils (POE/PAG), leading to compressor failure. Advanced degreasing and ultrasonic cleaning ensure chemical residue levels fall well below the limits outlined in EN 12735-1.
International OEMs and distributors look beyond pricing, focusing on regulatory certifications, mechanical characteristics, and supplier capacity. Critical criteria include:
Combining automated engineering with systemic quality assurance to deliver global values
Operating from Ningbo, one of the world's most robust deep-water port clusters, Ningbo Taojun Refrigeration Equipment Co., Ltd. integrates smart manufacturing (Factory 4.0) with localized supply chains to control cost and secure delivery.
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.
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. The company's goal is to support and cooperate with every sincere customer to achieve a win-win situation.
Specialized in Refrigeration Components for Over 38 Years
Taojun is specialized in refrigeration parts for 38 years. Our filter driers, access valves, and condensers are engineered with features to absorb moisture and acid, and to filter out impurities. They are installed as original components and replaced as repair parts for both domestic and commercial refrigerators and freezers.
Our commitment to tech, R&D, quality control, and certified excellence
Our core manufacturing equipment is imported directly from Germany, ensuring sub-micron manufacturing accuracy.
We have 15 engineers in our R&D centre, all of them are doctors or professors from the University of Science and Technology of China.
Customized sizes and shapes are available. Welcome to share your ideas with us; let's work together to create innovative solutions.
Our ITO film (no shrinkage, no color difference) and liquid crystal spacer (excellent uniformity) are imported directly from Japan; glue is imported directly from Europe; our liquid crystal temperature range is 70°C and protective film is resistant to high temperatures of 80-90°C.
High & low temperature testing at 75°C and -35°C for 500 hours; thermal shock testing from 10°C-90°C for 30 minutes; damp heat testing for 500 hours; moisture removal by oven; smart films in sheets undergo a 24-hour aging test; smart films in rolls are tested with 100V high voltage to ensure zero breakdown.
Deep expertise in copper filter drier manufacturing and quality control systems
TAOJUN was established in 1988 and has been producing copper filter driers for 41 years. We have domestic leading research and development abilities in refrigeration parts, as well as industry-advanced quality control capabilities. Since our start, Taojun's competitive edge has always been rooted in technology.
TAOJUN copper filter driers are designed to absorb moisture and acid, and to filter out impurities. They are installed as original components and replaced as repair parts for both domestic and commercial refrigerators and freezers.
A history of growth, technology advancements, and manufacturing upgrades
Our original factory building and early production facilities in Xiangshan, Ningbo.
Deployment of our MES intelligent workshop management system, transitioning into digital production tracking.
Expansion of smart production capacities, handling custom high-pressure components for green HVACR systems globally.
Supporting international partnerships with solid values and engineering capability
A world brand is supported by a corporate culture. We fully understand that our corporate culture can only be formed through Impact, Infiltration, and Integration. The development of our group has been supported by our core values over the past years: Honesty, Innovation, Responsibility, and Cooperation.
Our group always adheres to the principle of being people-oriented, maintaining integrity management, prioritizing quality, and securing a premium reputation. Honesty is the source of our group's competitive edge.
Innovation is the essence of our group culture. Innovation leads to development, which leads to increased strength. Our people make innovations in concepts, mechanisms, technology, and management.
Responsibility enables perseverance. Our group has a strong sense of responsibility and mission for clients and society. This responsibility is the driving force behind the development of our group.
Cooperation is the source of development. Working together to create a win-win situation is a key corporate goal. By executing integrity cooperation, our group has managed to achieve the integration of resources and mutual complementarity.
Adapting our high-purity copper components to challenging installation environments
Different regions present unique challenges that affect copper fittings performance:
Guaranteeing supply chain transparency and reliable technical support
• Inquiry and consulting support. 15 years pump technical experience.
• One-to-one sales engineer technical service.
• Hot-line of service is available in 24h, responded in 8h.
• Technical training & Equipment evaluation.
• Installation and debugging troubleshoot.
• Maintenance, update, and improvements.
• One-year warranty. Technical support is free for the lifespan of the products.
• Constant communication to gather feedback and continuously refine product quality.
For Precision Refrigeration Components (Filter Driers, Condensers, Access Valves)
Certification Document
Scope of Certification
Juntao Refrigeration (NINGBO TAOJUN REFRIGERATION EQUIPMENT CO.,LTD.) stands as a globally recognized leader in the design and production of critical refrigeration components. With our official GB/T19001-2016/ISO9001:2015 certification (Registration No.: 41325Q00065R0S), we demonstrate commitment to quality in manufacturing filter driers, condensers, and access valves. Verifiable via China’s CNCA (www.cnca.gov.cn) and our partner Zhongci International (www.zcgirz.com).
Why we lead in precision engineering and global distribution
35+ years of R&D expertise with Zhejiang University collaboration.
ISO 9001, IATF 16949 certified; 5D quality system (0.05% defect rate).
50+ country network; partnerships with Haier, Midea, Whirlpool.
OEM/ODM support; 500-unit MOQ; 72-hour global delivery.
RoHS, REACH, WEEE certified; 100% recyclable packaging.
MES system, CCD visual inspection, helium leak testing.
98.6% satisfaction (2023); 24-hour complaint resolution.
±0.02mm aluminum foil tolerance; 10-year lifespan testing.
Smart product innovation; green manufacturing for industry sustainability.
Tour our state-of-the-art facilities
Reliable answers regarding specifications, materials, and ordering procedures
We use C12200 Deoxidized High Phosphorus (DHP) copper, which contains a minimum of 99.90% pure copper and a controlled phosphorus content between 0.015% and 0.040%. This alloy provides excellent brazing characteristics, high thermal conductivity, and resistance to hydrogen embrittlement under operating conditions.
Yes, all our copper elbows and customized tube fittings conform to ASME B16.22 (Wrought Copper and Copper Alloy Solder Joint Pressure Fittings) and European standard EN 1254-1. We provide certificate documentation with mill test reports for chemical composition and mechanical properties upon request.
We employ high-precision automated argon arc welding and specialized brazing processes for our filter drier shells. Every unit undergoes automated helium leak detection and high-pressure decay testing up to 60 bar to ensure zero leak rates in active commercial or domestic refrigeration circuits.
Our standard MOQ is 500 units per line item. For customized shapes, return bends, or special design configurations, lead times typically range from 15 to 25 days depending on the tool requirements. Standard catalog items can be prepared for shipping within 72 hours from our Ningbo facility.
Our facility is officially certified under GB/T19001-2016/ISO9001:2015. Additionally, our components conform to the European Union RoHS environmental directive and carry US UL safety certifications, making them approved for assembly by top global brands like Haier, Midea, Whirlpool, and Electrolux.
High-efficiency components from our manufacturing lines to optimize your thermal systems
Top performance components requested by global refrigeration systems builders
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. The company's goal is to support and cooperate with every sincere customer to achieve a win-win situation.
Taojun
