Direct factory integration of robust adapters, filters, and high-performance accessories manufactured under cleanroom conditions.
In modern HVAC/R manufacturing and process cooling industries, the performance of fluid connection systems directly dictates operational energy efficiency, environmental safety, and system longevity. Quick couplers and high-precision copper components represent the critical joints within these closed-loop refrigeration lines.
Originally established 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 domestic and international manufacturer. Our engineering background allows us to integrate deep academic research with precision industrial manufacturing, formulating structural solutions for global refrigeration and HVAC networks.
Today, Taojun operates as a certified national high-tech enterprise, maintaining a strong footprint across high-demand OEM brands including Haier, Midea, Whirlpool, Electrolux, and Gree. Our catalog features high-purity copper filter driers, check valves, air conditioning couplers, and copper accessories, all engineered to meet strict leak rate and pressure tolerances.
See how Taojun implements advanced automated machining lines, deep chemical desiccant integration, and multi-stage leak test systems. Our production workflow combines automation with strict quality control checkpoints.
Engineering the next generation of zero-emission fluid connections for low-GWP refrigerants.
Future quick coupler designs rely on dry-break valves. By minimizing fluid entrapment within the coupler cavity during disconnection, we reduce atmospheric refrigerant venting. Our design optimizes fluid path geometry, lowering flow friction and turbulence to improve HVAC compressor system efficiency.
The transition from legacy HFCs to low-GWP alternatives (such as HFO R1234yf, R32, and R290 propane) requires new elastomer compatibility. We are upgrading seal materials to high-performance HNBR and modified EPDM to ensure long-term resistance to oil extraction and low-temperature brittleness.
Our R&D team is developing prototypes for smart quick couplers with integrated pressure and temperature sensors. By transmitting system status directly to the central diagnostic unit, these connections help prevent failures and refrigerant leaks during operation.
Tailoring connection and filtration systems to the operational demands of diverse sectors.
In split air conditioning systems and commercial VRF installations, field connections must remain leak-free over decades of operation.
Automotive assembly lines and maintenance centers require quick couplers that connect and disconnect rapidly without losing pressure.
Supermarkets and industrial cold storage rely on filtration to catch system debris, moisture, and acid before they damage the compressor.
Years of HVAC Industry Focus
Target PPM Defect Rate
Academic R&D Engineers
Extreme Thermal Shock Testing
We operate an integrated production plant in Xiangshan, Ningbo, featuring CNC machining, automated brazing systems, and modern testing equipment.
MES Intelligent Workshop Management: Real-time tracking from raw copper input to the final packaged unit ensures batch traceability. Every quick coupler assembly is laser-marked with a code to track manufacturing metrics.
Automated CCD Visual Inspection: Optical measurement systems scan critical thread and seat tolerances to ±0.02mm, preventing dimensional deviations.
Material Procurement & Integrity: We import high-grade molecular sieves and structural brass directly from trusted partners, ensuring uniform density and chemical composition for consistent performance under pressure.
How Taojun aligns with the sourcing standards of tier-one appliance manufacturers.
Global brands require detailed quality documentation. Taojun provides material test reports (MTR), third-party laboratory analysis certificates, and certifications including ISO 9001:2015, UL, and RoHS compliance documents.
Unexpected downtime can interrupt assembly lines. We manage safety stocks for key partners, enabling 72-hour fast delivery windows from major logistics centers. Our location in Ningbo offers direct access to container ports for efficient international shipping.
Refrigeration systems often require custom sizes, angles, and connection options. Working with our in-house engineering team, we can produce custom prototypes within 5 working days from 3D models and specifications.
ISO 9001:2015 Certificate
Detailed Scope Document
Ningbo Taojun Refrigeration maintains certified manufacturing lines to meet international safety and environmental regulations.
Our official GB/T19001-2016 / ISO9001:2015 certification (Registration No.: 41325Q00065R0S) confirms our process control across filter driers, condensers, and access valves. These standards are verified by China's CNCA and Zhongci International.
Additionally, our products meet the requirements of the EU RoHS and REACH directives, ensuring all components are free of hazardous substances and suitable for eco-conscious refrigeration systems globally.
Expert technical insights from Taojun's engineering department.
Refrigerants can react with trace moisture to produce hydrofluoric or hydrochloric acids, which can corrode compressor windings and cause electrical failures. Our copper filter driers utilize high-purity 3A molecular sieves that chemically absorb moisture and trap acid byproducts without reacting with the refrigerant or lubricants.
High-pressure charging systems require fatigue-resistant metals. We use solid brass and hard-anodized aluminum alloys to machine the coupler bodies, combined with high-grade stainless steel ball locks. The internal valve seals utilize HNBR, which remains stable and resilient when exposed to refrigeration lubricants.
We use a multi-stage testing process. Each production run is pre-screened with dry nitrogen pressure decay, followed by helium mass spectrometer leak detection. Our testing processes are designed to identify leaks down to a threshold of 0.05 grams per year, meeting environmental regulations for leak prevention.
Our copper-phosphorus brazing rods have self-fluxing characteristics when used to join copper to copper, reducing slag formation. The alloy's fluid flow properties ensure clean capillary penetration, producing joints with high tensile strength and vibrational resistance in refrigeration piping systems.
Founded as Xiangshan Refrigeration Accessories Factory of Zhejiang University, initiating R&D on copper refrigeration filtration.
Expanded manufacturing capacity and built a dedicated plant to support domestic appliance manufacturers.
Implemented our first digital manufacturing control protocols, integrating visual inspection and MES systems.
Established Ningbo Taojun Refrigeration Equipment Co., Ltd. and introduced our specialized brand of valves and condensers.
Recognized as a National High-Tech Enterprise. Extended global export network to over 50 countries, partnering with key global appliance brands.
As an established supplier in the refrigeration industry, we provide reliable component manufacturing with consistent quality control and a focus on long-term performance.
Our Corporate Core Values:
Honesty: We prioritize transparent business relationships, consistent material specifications, and clear product performance data.
Innovation: We continually update our tooling and manufacturing equipment, utilizing modern CNC machining and testing lines.
Responsibility: We maintain strict testing standards, including temperature cycle testing from -35°C to 75°C, to verify component reliability.
Cooperation: We collaborate with engineering partners to develop custom configurations for specific HVAC and refrigeration designs.
A complete selection of valves, fittings, and accessories engineered to complete your closed-loop fluid systems.
Taojun