Explore our industrial-grade components designed to meet rigorous HVAC, cold storage, and refrigerant requirements globally.
In contemporary commercial and industrial refrigeration, the transition from older HCFC agents to higher-efficiency HFCs like R410a—and next-generation blends like R32 and R454B—has structurally altered piping specification criteria. R410a operates at pressures up to 1.6 times higher than traditional R22 systems. This demands flawless integrity of refrigeration piping systems.
Standard plumbing copper tubes fail to satisfy this parameter. Top-tier R410a copper pipes are engineered from C12200 Deoxidized High Phosphorus (DHP) copper (minimum 99.9% pure copper), complying with international norms such as ASTM B280 and EN 12735-1. These standards dictate precise wall-thickness tolerances, high yield strength, and clean inner surfaces (with minimal residual carbon content) to prevent compressor breakdown and fluid degradation.
Choosing a manufacturer certified in these critical engineering parameters is paramount to safeguarding equipment longevity and system performance.
A Legacy of Excellence in Refrigeration Engineering Since 1988
Ningbo Taojun Refrigeration Equipment Co., Ltd. is located in Xiangshan, Ningbo, a beautiful tourist city. Founded in 1988, its predecessor was the Xiangshan Refrigeration Accessories Factory of Zhejiang University. Over the past 30+ years, our continuous drive for technical breakthroughs has allowed us to grow into a leading comprehensive enterprise.
Today, we specialize in the design, development, production, and after-sales service of refrigeration components. In 2021, Taojun was recognized as a National High-Tech Enterprise, acknowledging our commitment to technological and process innovation, machinery upgrades, and international quality management protocols.
Our leading product catalog spans filter driers, check valves, air conditioning valves, condensers, brass and copper accessories, air conditioning cable ties, and other essential refrigeration parts. Holding ISO9001:2008, EU RoHS, and US UL certifications, we deliver reliability to global markets.
Established in 2012, our specialized brand divisions ("Taojun" Condensers, "Taojun" Stop Valves) have earned long-term partnerships with leading domestic and foreign home appliance manufacturers.
Our product sales network covers major Chinese industrial hubs and exports extensively to Europe, the Americas, Southeast Asia, the Middle East, and Africa.
Specialized Refrigeration Component Design & System Integration
Taojun has specialized in refrigeration parts for 38 years. Our core copper filter driers are engineered to absorb moisture and acid, and filter out impurities. They are installed as crucial components in both domestic and commercial refrigerators, freezers, and heat pump systems.
Engineered Precision, German Manufacturing Infrastructure, and Deep R&D Strength
Our core manufacturing and assembly equipment are imported directly from Germany to guarantee high-precision calibration.
We maintain 15 engineers in our R&D center, consisting of doctors and professors from the University of Science and Technology of China.
From raw materials to finished items, we execute rigorous multi-point validation to achieve target defect-free production lines.
Our commitment to material science is unparalleled. Across our product lines, including our specialized refrigeration systems and electronic components:
We subject our finished products to extreme stress profiles to replicate decades of active service:
A peek inside our advanced manufacturing workflow and testing laboratories
For 41 years, Ningbo Taojun has developed specialized industrial capabilities in HVAC accessories and system filters. We have built industry-leading R&D capabilities, implementing high-grade quality control processes at every stage of the manufacturing cycle.
Taojun copper filter driers are designed to absorb moisture and acid, and filter out impurities. Normally installed as a component and replaced as a repair part for both domestic and commercial refrigerators and freezers.
Tracing our path from a local specialized workshop to a global industrial supplier
1998
Our initial factory building was expanded to meet growing domestic commercial refrigeration demand.
2008
Integrated the MES intelligent workshop management system, transitioning to digitize production data.
2024
Implemented smart automation across production lines to scale our global supply chain.
A global brand is sustained by a cohesive corporate culture. We fully understand that our culture forms through Impact, Infiltration, and Integration. Over the past years, our group's growth has been built on our core values: Honesty, Innovation, Responsibility, and Cooperation.
Honesty: We adhere to a people-oriented, integrity-first management style, prioritizing quality to build our competitive edge.
Innovation: We continuously innovate our concepts, mechanisms, technology, and management structures to adapt to emerging market opportunities.
Responsibility: We maintain a strong sense of mission toward our clients and society, driving our long-term development.
Cooperation: By fostering integrity-based cooperation, we integrate resources and complement each other's strengths, allowing professional teams to maximize their potential.
Versatile deployment scenarios and end-to-end technical support
For Precision Refrigeration Components (Filter Driers, Condensers, Access Valves)
Juntao Refrigeration (Ningbo Taojun Refrigeration Equipment Co., Ltd.) is a globally recognized manufacturer of critical refrigeration parts. Our official GB/T19001-2016/ISO9001:2015 certification (Registration No.: 41325Q00065R0S) confirms our adherence to strict quality control in manufacturing filter driers, condensers, and access valves.
This certification, verifiable via China's CNCA (www.cnca.gov.cn) and our auditing partner Zhongci International (www.zcgirz.com), validates our OEM and ODM capabilities. We deliver precision and supply chain security from our ISO-certified facility in Zhejiang, China.
Main Certification Document
Detailed Scope of Certification
Why OEM/ODM clients trust Taojun to secure their HVAC/R supply chains
Over 35 years of R&D expertise, collaborating with Zhejiang University engineering labs.
ISO 9001 and IATF 16949 certified. 5D quality control system ensures a low defect rate of 0.05%.
Exporting to 50+ countries with active supply contracts for Haier, Midea, and Whirlpool.
Full OEM/ODM support with flexible MOQ requirements and global logistical delivery capabilities.
RoHS, REACH, and WEEE certified manufacturing lines with 100% recyclable product packaging options.
Equipped with MES tracking, CCD visual inspection stations, and helium leak testing systems.
Achieving ±0.02mm tolerances on aluminum foil and copper components, backed by 10-year lifespan testing.
Strategically located near Ningbo Port, enabling prompt container loading and efficient shipping.
Developing eco-friendly products to meet the evolving global regulations for low-GWP refrigerants.
Technical guidance for HVAC procurement departments and refrigeration design engineers
R410a systems operate at approximately 50% to 60% higher pressures than standard R22 equipment. R410a copper piping requires thicker walls and higher structural integrity (conforming to ASTM B280) to handle pressure loads up to 4.3 MPa without rupture. Standard R22 piping has thinner walls and may fail under these operating conditions.
The standard alloy is C12200 Deoxidized High Phosphorus (DHP) copper. It contains a minimum of 99.9% pure copper and 0.015% to 0.040% phosphorus. This composition prevents hydrogen embrittlement during brazing and ensures long-term ductility, which is essential for bending and flaring.
High-pressure HFC systems like R410a use synthetic POE (polyolester) lubricants, which are highly solvent. POE oils dissolve residual carbon or oxides on the inner pipe walls, carrying these particles to the expansion valve or compressor. Ensuring inner surface cleanliness (residual limits below 0.038 g/m²) is crucial to prevent clogging and compressor breakdown.
We perform helium leak detection, automated CCD visual inspections, and high-pressure burst testing up to design limit multiples. We also conduct environmental chamber aging tests (-35°C to 75°C for 500 hours) to ensure our components maintain reliable sealing in diverse operating environments.
Yes. R32 and R454B operate at similar pressures to R410a. Our C12200 DHP copper pipes are compatible with these newer low-GWP alternatives, making them suitable for transitioning systems.
Verify details, check manufacturing specs, and contact our team for bulk orders
Our product sales network covers major Chinese industrial hubs and exports extensively to Europe, the Americas, South America, Southeast Asia, the Middle East, and Africa. We aim to collaborate with partners to achieve mutually beneficial outcomes.
Taojun