Explore our core engineering catalog featuring high-grade air conditioner brackets, copper accumulators, filters, and specialized welding consumables.
Founded in 1988 as the Xiangshan Refrigeration Accessories Factory of Zhejiang University, Ningbo Taojun Refrigeration Equipment Co., Ltd. has developed over three decades into a leading integrated enterprise. Our multi-faceted manufacturing encompasses design, custom R&D, precision manufacturing, global distribution, and full lifecycle technical support.
We specialized in refrigeration and HVAC components for over 38 years. Our core portfolio spans copper filter driers, stop valves, access valves, wire tube condensers, and custom refrigeration brass fittings. In 2021, Taojun was recognized as a National High-Tech Enterprise, reinforcing our dedication to metallurgical excellence, precision machining, and strict quality control.
By blending advanced metallurgical engineering with computer-aided design, our components ensure airtight security in extreme operating conditions. Our proprietary domestic brand "Lingshan" is a recognized standard in China, while our international brand "Taojun" serves partners across Europe, North America, Southeast Asia, and the Middle East.
How Ningbo’s industrial clusters, advanced machinery, and material science optimization deliver superior global performance.
We source ultra-pure HPb59-1 leaded brass and custom low-lead formulations that comply with REACH and RoHS regulations. Our raw materials demonstrate consistent tensile strength, allowing for threads that withstand repeated torque cycles without galling or structural deformation.
Our workshop utilizes automated Swiss-type lathes and high-speed CNC machining centers. This technology ensures dimensional tolerances of ±0.02mm, maintaining exact pitch alignment for gas-tight seals in HVAC, refrigeration, and pneumatic flow applications.
Located in Xiangshan, Ningbo, our facility sits in a premier global manufacturing cluster. We enjoy direct access to deep-water shipping lanes and localized toolmaking, metal finishing, and raw material processing, reducing production lead times by up to 30% compared to international competitors.
Meeting strict international requirements for engineering standards, supply chain transparency, and quality assurance.
Modern procurement directors look for more than low prices. Global enterprises require high reliability, compliance with environmental regulations, and zero-defect quality standards. Taojun addresses these challenges directly through our rigorous operational framework:
Our quality system is verified by recognized third-party agencies to ensure compliance at every stage of the design and manufacturing process:
ISO 9001:2015 & GB/T19001-2016 Certified
Registration Certificate No: 41325Q00065R0S. Authorized scope covers the design and manufacture of refrigeration filter driers, condensers, and access valves.
Global Market Access Compliance
Full compliance with EU RoHS, REACH, and US Underwriters Laboratories (UL) safety directives for pressurization and high-pressure media control.
How our precision brass nuts and refrigeration accessories perform in critical heating, cooling, and fluid management systems.
Our brass flare nuts, filter driers, and access valves provide reliable, leak-free connection points for indoor units, outdoor split condensers, and residential heat pumps utilizing R410a, R32, or R290 refrigerants.
We supply manufacturers of commercial refrigeration cabinets, walk-in cold rooms, and commercial ice makers with molecular sieve liquid line filter driers and connection nuts, protecting compressor loops from damaging moisture and acids.
Our high-pressure brass couplers, service valves, and custom extrusion fittings are designed to withstand structural vibrations and thermal fluctuations in automotive cabin cooling systems.
How we maintain low tolerance ranges and ensure component reliability in high-pressure refrigeration environments.
Our R&D department collaborates with engineers and materials scientists from the University of Science and Technology of China. This partnership supports continuous process improvement and innovation in copper-brass brazing, alloy microstructure control, and filtration technologies.
Our production facilities utilize modern manufacturing equipment imported from Germany and Japan. This machinery enables automated high-speed cold heading and high-precision thread rolling. The resulting components feature smooth contact faces that prevent joint fatigue and minimize pressure loss in refrigeration circuits.
Every batch of finished products undergoes thorough quality control and safety testing, including:
| Parameter | Value / Specification |
|---|---|
| Brass Alloy Grades | HPb59-1, C36000, CW614N (Low-lead & Lead-free options) |
| Thread Standards | SAE, NPT, BSP, ISO Metric (Class 6H/6g precision) |
| Dimensional Tolerance | Standard ±0.02mm (Critical dimensions down to ±0.01mm) |
| Operating Pressures | Up to 60 Bar (Designed for high-pressure systems) |
| Brazing Process | Automated induction brazing & controlled atmosphere argon arc welding |
Three decades of manufacturing excellence, innovation, and partnership with global brands.
Established as Xiangshan Refrigeration Accessories Factory of Zhejiang University, blending academic research with industrial metal manufacturing.
Constructed our dedicated factory building in Ningbo to increase production capacity for domestic home appliance manufacturers.
Implemented our MES intelligent workshop management system, providing digital control over material flows and batch tracking.
Upgraded to a modern manufacturing facility featuring automated packaging, visual sorting robotics, and integrated testing labs.
We build our operations on four core values: Honesty, Innovation, Responsibility, and Cooperation. These principles guide our customer partnerships and our internal manufacturing standards.
We utilize open-book alloy sourcing, direct raw material testing, and verified thickness reports, ensuring customers receive components built exactly to print.
We continuously refine our tooling layouts, cold heading configurations, and thread tolerances to optimize processing speeds and minimize scrap rates.
We stand behind our components. Our team offers post-sales troubleshooting and assembly integration audits to help maximize product performance in the field.
We work closely with leading brands like Haier, Midea, Whirlpool, Electrolux, and Gree, coordinating production schedules to support global manufacturing operations.
Detailed technical information and ordering guidance for procurement managers and engineering specialists.
Our standard production utilizes HPb59-1 leaded brass, which offers excellent machinability and durability. For customers with specific environmental or regulatory requirements, we also supply low-lead alloys (such as C36000 or CW614N) that comply with REACH and RoHS standards for consumer and drinking water systems.
We machine our flare faces to a smooth, uniform surface finish that ensures a metal-to-metal seal under proper torque. Our automated CNC lathes maintain precise thread profiles and chamfer angles, preventing assembly misalignment and protecting system pressure integrity.
Our standard MOQ is 500 units for stock items and catalog designs. For custom modifications or custom prints, typical production times range from 15 to 30 days depending on component complexity and material sourcing requirements. Emergency shipments can sometimes be coordinated based on production schedules.
Yes. Our in-house engineering team provides full design collaboration services, including CAD modeling, clearance analysis, and pressure-boundary evaluations. We work directly from customer drawings or physical samples to optimize components for automated assembly lines.
Each shipment is accompanied by detailed Quality Inspection Reports. This documentation includes material chemical analysis, dimensional inspection audits, and pressure testing logs. Our facility maintains active ISO 9001:2015 registration, and our products carry UL and RoHS compliance documentation where required.
After machining, all brass and copper components go through an ultrasonic washing process to remove cutting oils and particulates. We then apply a light passivation treatment to prevent oxidation during storage and sea transit. Components are packed in moisture-resistant bags with desiccant packs inside double-walled corrugated shipping containers.
A look inside our manufacturing processes, including raw material extrusions, high-volume machining, and quality assurance testing.
High-Speed Machining Workshop
Automated Inspection Line
Pressure Testing Laboratory
Explore our selections of charging hoses, copper filter driers, capillary coils, and system access valves.
Our products undergo rigorous testing to meet strict international standards for safety and reliability.
Taojun
