Explore our leading selection of OEM-certified copper tubing, brazing materials, system valves, and custom cooling components.
In modern industrial refrigeration and HVAC manufacturing, the copper pancake coil represents the standard for thermal efficiency, ductility, and structural integrity. Global procurement divisions demand copper tubing that resists pressure stresses, handles high-frequency vibration, and features minimal residual carbon level on its inner surface to prevent contamination in closed-loop refrigerant circuits.
As the global market transitions rapidly toward environmentally responsible refrigerants (such as R32, R290, and CO2), operating pressures have risen dramatically. This makes the selection of high-quality deoxidized high-phosphorus (DHP) copper coils (specifically UNS C12200) essential for ensuring the longevity of heat exchangers, condensers, and evaporator coils.
Our global supply chain guarantees high dimensional accuracy with wall thickness variations kept within tight margins, satisfying standard specifications such as ASTM B280, EN 12735-1, and JIS H3300.
Founded in 1988, Ningbo Taojun Refrigeration Equipment Co., Ltd. (formerly the Xiangshan Refrigeration Accessories Factory of Zhejiang University) has spent over 35 years building a reputation for excellence in the HVAC/R component sector. Based in Xiangshan, Ningbo, China, our company integrates design engineering, advanced materials research, multi-line manufacturing, and global sales support.
Today, our product range includes copper pancake coils, high-performance copper filter driers, check valves, service/stop valves, finned tube condensers, and custom brass connectors. In 2021, the company was recognized as a National High-Tech Enterprise, emphasizing our focus on technological innovation, manufacturing automation, and strict quality control.
Providing technical detail and manufacturing transparency to support global HVAC/R system designers.
A refrigeration system's life cycle depends on keeping its refrigerant loop free from impurities. Our copper filter driers are designed to absorb moisture and acids, filtering out fine particulate matter before it can damage system compressors.
From high-volume domestic appliance assembly lines to specialized commercial cold storage systems, our components are certified for the following use cases:
Our copper pancake coils and HVAC/R piping align with global B2B engineering standards.
| Specification Metric | ASTM B280 (USA) | EN 12735-1 (Europe) | JIS H3300 (Japan) | Taojun Factory Standard |
|---|---|---|---|---|
| Alloy Grade | UNS C12200 (DHP) | Cu-DHP | C1220T | UNS C12200 (Copper ≥ 99.9%) |
| Outside Diameter Range | 1/8" to 1-1/8" | 6.0 mm to 28.58 mm | 4.0 mm to 28.58 mm | Custom limits (3.0 mm to 54.0 mm) |
| Wall Thickness Tolerance | ± 0.089 mm | ± 0.05 mm | ± 0.06 mm | ± 0.02 mm (High Precision Limit) |
| Inner Cleanliness Limit | ≤ 0.038 g/m² | ≤ 0.038 g/m² | ≤ 0.030 g/m² | ≤ 0.025 g/m² (Highly Deoxidized) |
| Tensile Strength (O60 Temper) | ≥ 205 MPa | ≥ 220 MPa | ≥ 205 MPa | 215 MPa to 245 MPa |
We perform rigorous inspections at every stage of the manufacturing process. From raw DHP copper selection to final product packaging, our quality assurance protocols ensure high reliability for challenging industrial installations.
Our protective films are selected to endure high temperatures (80-90°C) without degradation. The desiccant matrices, active compounds, and specialty components are sourced from quality-verified suppliers to prevent dynamic degradation over the lifetime of the component.
From a local supplier to a global refrigeration component partner.
Establishment of dedicated manufacturing facilities in Xiangshan, Ningbo, expanding raw processing capacities.
Implementation of digitalized MES workshop control systems to manage product tracking and minimize defects.
Commissioning of next-generation automated drawing lines and nitrogen purging systems to support international markets.
We work closely with global refrigeration and home appliance brands. Ningbo Taojun has developed stable manufacturing partnerships with well-known domestic and international enterprises, including Gree, Midea, Haier, Xinfei, Whirlpool, Electrolux, and Huarui.
Our facility offers extensive support for custom sizing, specific geometric bend requirements, custom wall thickness, and integrated manifold systems. Through collaborative product development, we help our partners optimize their system designs, improve thermal performance, and reduce material waste.
Backed by our parent development group, we utilize automated MES work cell scheduling and CCD visual defect identification to maintain production standards.
Official GB/T19001-2016/ISO9001:2015 Certification (Reg No. 41325Q00065R0S)
Take a closer look at our workshops, automated production lines, and testing laboratories.
Equipped with high-precision extrusion machinery and continuous annealing furnaces to guarantee uniform copper grain structures.
Fully automated welding, insertion, and nitrogen-purged sealing processes ensure consistent assembly quality.
Features inline eddy current flaw detectors, optical emission spectrometers, and burst test equipment.
Get technical answers to common B2B procurement questions regarding copper tubing and refrigeration parts.
High-durability accessories, capacitors, copper filter driers, and system maintenance valves from our ISO-certified facilities.
Taojun