High-precision brass and copper connector hardware, custom-machined refrigeration parts, and heavy-duty HVAC components built to ISO 9001:2015 standards.
Established in the historic coastal district of Xiangshan, Ningbo, Ningbo Taojun Refrigeration Equipment Co., Ltd. traces its origins back to the prestigious Xiangshan Refrigeration Accessories Factory of Zhejiang University in 1988. Over more than 35 years of strategic growth, our engineering foundation has integrated academic precision with high-capacity industrial manufacturing.
Today, Taojun operates as a comprehensive high-tech manufacturer specializing in filter driers, check valves, AC access valves, finned tube condensers, brass fitting systems, and specialized MIP (Male Iron Pipe) hose fittings. Our facility, recognized as a National High-Tech Enterprise in 2021, is committed to advanced quality standards, carrying ISO9001:2015, CE, RoHS, and UL safety certifications.
We work closely with global household appliance and HVAC leaders such as Haier, Midea, Gree, Whirlpool, Electrolux, and Huarui, supplying OEM and ODM parts tailored for high-pressure durability and clean refrigerant flow control.
Technical analysis of material selection, thread geometry, and internal configuration optimized for HVAC/R system longevity.
Industrial MIP (Male Iron Pipe) hose fittings require precise mechanical integrity to withstand pressure spikes and thermal cycling. Taojun utilizes high-grade brass alloy (specifically H59, HPb59-1, and lead-free C37700 compliance profiles) and high-purity red copper pipes. The metallurgy guarantees resistance to stress-corrosion cracking and galvanic corrosion when paired with iron or copper systems. Thread geometries are machined to ASME B1.20.1 standards, ensuring leak-free connections under high-pressure gas or fluid charge environments.
Our copper filter driers and access fittings feature a multi-layered barrier to keep systems clean. This design includes:
• Outer Shell: Seamless, high-purity copper tubing designed for high burst pressure.
• Desiccant Core: A specialized blend of 3A Molecular Sieve (water absorption capacity ≥ 20%) combined with activated carbon to capture moisture, acidic impurities, and solid particles.
• Joining Process: Argon arc welding and automated brazing stations provide uniform joint strength, preventing refrigerant loss.
The shifting demands of high-pressure HVAC/R infrastructures and the role of quality connections.
The global heating, ventilation, air conditioning, and refrigeration (HVAC/R) industry is undergoing a significant transition. Driven by international climate agreements such as the Kigali Amendment, commercial HVAC systems are moving away from traditional refrigerants to high-pressure synthetic alternative refrigerants (like R32) and natural refrigerants (like R290 and CO2/R744). These refrigerants operate under high pressure ranges, requiring stronger and more reliable connections.
For example, CO2 refrigeration systems require operating pressure designs that exceed 120 bar. In these systems, standard pipe connections can fail under high pressure and thermal contraction. High-quality MIP (Male Iron Pipe) hose fittings and solid brass adapters help maintain structural integrity under these pressures. Industrial distributors and OEM manufacturers are shifting their sourcing to factories capable of supplying forged brass components with precise thread accuracy to prevent micro-leakage and refrigerant loss.
How Taojun components perform across specialized climate zones, heavy industries, and critical installations.
In sub-zero distribution networks in Western Europe and North America, connections face rapid thermal changes. Taojun's copper-plated brass fittings and molecular sieve filter driers prevent moisture condensation, protecting downstream expansion valves from freezing.
Offshore refrigeration and marine cargo cooling systems are exposed to salty, humid environments. Our high-durability H59 brass connectors resist dezincification and corrosion, ensuring long-term seal integrity in marine applications.
For municipal heat pumps in cold regions, plumbing connections must withstand continuous vibration. Taojun’s MIP brass hose fittings feature optimized thread profiles that distribute load evenly, preventing structural failures over years of operation.
Ningbo is a major global hub for industrial port logistics and advanced metallurgy. Operating from Xiangshan, Ningbo, Taojun leverages this specialized cluster to optimize its logistics and raw material sourcing. This regional advantage allows us to maintain stable, efficient production for high-volume orders.
With an integrated MES (Manufacturing Execution System) and automated brass extrusion and CNC machining lines, we manage production schedules in real time. For our global partners, this translates to shorter lead times, a reliable supply of raw materials, and efficient customs clearance via the Ningbo-Zhoushan port. Our production capacity allows us to offer flexible MOQs and standard 72-hour dispatch services for stocked components, helping partners manage inventory costs effectively.
Founded as the Xiangshan Refrigeration Accessories Factory of Zhejiang University, establishing our technical foundation.
Upgraded to MES intelligent workshop systems and launched the "Taojun" brand for international refrigeration components.
Certified as a National High-Tech Enterprise, expanding exports of precision HVAC/R fittings globally.
Innovative projects in our pipeline: Smart connectors, Eco-Brass transition, and ultra-high-pressure testing.
As the HVAC/R industry moves toward smarter and more sustainable systems, Taojun is developing products to meet these trends. Our engineering team, supported by collaboration with researchers from the University of Science and Technology of China, focuses on three main developments:
To prepare for stricter environmental standards in Europe and North America, we are transitioning our brass lines to lead-free copper alloys (lead content < 0.1%). This ensures compliance with drinking water and food-contact refrigeration regulations like NSF/ANSI 61 and 372.
We are developing next-generation MIP hose connectors with built-in ports for pressure and temperature micro-sensors. These components allow real-time monitoring of refrigerant properties, helping to detect leaks and optimize system efficiency.
We are expanding our testing setups to support trans-critical CO2 refrigeration cycles. By upgrading our testing equipment, we verify that our brass and copper joints can safely handle burst pressures exceeding 300 bar.
How Taojun ensures zero-breakdown quality through advanced testing procedures.
Quality control at Taojun starts with verified materials. We source raw ITO film and liquid crystal spacers from Japan, and high-performance bonding glues from Europe. This selection ensures our smart film products offer stable temperature performance up to 70°C and protective layers that resist temperatures up to 80-90°C.
For refrigeration components, every production batch goes through rigorous environmental and functional testing in our laboratory, including:
• Thermal Aging Test: Testing at high and low extremes (75°C to -35°C) for 500 hours to ensure mechanical stability.
• Thermal Shock Test: Cycling between 10°C and 90°C for 30-minute intervals to check joint integrity.
• Damp Heat Exposure: 500 hours under high-humidity conditions to verify corrosion resistance.
• High-Voltage Testing: Smart films are tested at 100V to ensure dielectric strength, while refrigeration components undergo helium leak detection to guarantee tight seals.
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