Explore our high-performance refrigeration parts & custom copper pipeline components engineered for ultimate systems integrity.
In high-capacity HVAC and refrigeration engineering, 7/8" ACR (Air Conditioning and Refrigeration) copper pipe serves as the baseline for liquid and suction lines. Selecting appropriate alloys, wall thicknesses, and connection methodologies is paramount when working with high-pressure ecological refrigerants (such as R410A, R32, and R744/CO2).
Ningbo Taojun Refrigeration Equipment Co., Ltd. (formerly Xiangshan Refrigeration Accessories Factory of Zhejiang University) has pioneered refrigeration component manufacturing since 1988. We design, process, and test high-purity C12200 deoxidized high-phosphorus copper to handle mechanical stress and resist high pressures. This makes it an ideal option for large-scale heat pump loops and commercial systems.
Bridging academia and advanced metallurgical processing to set industry standards since 1988.
Founded in 1988, Ningbo Taojun Refrigeration Equipment Co., Ltd. traces its roots back to the Xiangshan Refrigeration Accessories Factory of Zhejiang University. Over more than 35 years of development, we have established a complete manufacturing framework that integrates engineering design, manufacturing, globally oriented supply logistics, and after-sales support.
As a verified high-tech enterprise, we manufacture under registered brand names, including "Lingshan" filter driers and "Taojun" refrigeration valves. Our production plant spans precision drawing, metal forming, assembly, and testing. It features direct technical integration with national academic institutions to ensure the structural integrity of our HVAC components.
A rigorous breakdown of our technical manufacturing capabilities for global HVAC systems.
We source raw C12200 copper alloy. It offers thermal conductivity up to 305 W/m·K and a tensile strength profile of 220–300 MPa, meeting international EN 12735 and ASTM B280 requirements.
Our copper filter driers feature 3A molecular sieve cores. They prevent moisture bypass, capture acid, and filter solid contaminants down to 20 microns in high-pressure circuits.
We use automated orbital welding and dry argon purging during manufacturing. This process prevents oxygen scaling on internal copper walls, reducing the risk of expansion valve blockages.
How our heavy-wall copper pipes and custom accessories integrate into high-demand systems.
Modern VRF air conditioning loops rely on 7/8" copper line segments for gas transport. Taojun's copper pipes are design-hardened to prevent cracks at connection bends and withstand variable refrigerant flows.
Supermarket walk-in freezers and cold rooms experience high thermal stress. Our copper filter driers absorb trace moisture, helping prevent acid build-up and protecting compressors from premature failure.
In medical imaging and food processing facilities, chillers run continuously. Taojun's copper components feature low-tolerance machining. This ensures reliable flow dynamics and minimizes pressure drop across the loop.
To maintain our <0.05% field defect rate, Taojun uses a comprehensive quality testing protocol that monitors production from raw materials to final packaging.
Our manufacturing facilities and copper accessories comply with international structural safety standards, facilitating seamless project approvals worldwide.
Why OEM partners choose Taojun as their strategic B2B manufacturer.
Located in the Ningbo industrial zone in Zhejiang, our plant benefits from direct access to raw copper refineries, processing chemical suppliers, and tooling manufacturers.
Our proximity to the Port of Ningbo allows us to transition cargo from the factory floor to maritime container yards in under 4 hours, ensuring reliable logistics timelines.
We configure custom lengths, wall dimensions, and brazing options for copper tubes. This flexibility is supported by an in-house tooling center and an engineering team with 15 professionals.
For decades, we have supplied key refrigeration components to global home appliance brands, meeting high engineering requirements and strict supplier evaluations.
How we are refining our production methods to support high-efficiency HVAC designs.
As the industry transitions to lower-GWP alternatives, mechanical pressure requirements for piping systems are rising. For instance, operating pressures in carbon dioxide (R744) gas coolers can exceed 120 bar. Taojun is optimizing wall structure designs to increase burst limits without adding excess raw material weight.
Additionally, we are expanding our automation lines. Integrating advanced MES tracking and CCD vision inspection systems helps ensure that all brazing connections on our copper driers and access valves remain consistent across production runs.
Refining C12200 alloy grain sizes to withstand high gas-cooler pressures in natural refrigerant systems.
Expanding vacuum chambers and automated gas charge verification to ensure seal reliability.
Working toward recycling production scrap and incorporating 100% recyclable shipping cartons.
Engineering answers to common specifications, material selection, and deployment questions.
Explore our complete manufacturing portfolio, featuring custom filter driers, brass adapters, and connection fittings.
Taojun