Engineered to exceed critical industrial requirements for reliability, heat transfer, and pressure control
Ningbo Taojun Refrigeration Equipment Co., Ltd. is situated in Xiangshan, Ningbo, a highly-developed industrial node. Founded in 1988, our operational foundation traces back to the Xiangshan Refrigeration Accessories Factory of Zhejiang University.
For over 30 years, Taojun has evolved from a dedicated laboratory support workshop into a leading national high-tech enterprise. Our extensive capability spans design, R&D, precision manufacturing, and comprehensive testing of key refrigeration accessories, including filter driers, check valves, air conditioning valves, condensers, brass & copper accessories, and HVAC installation items.
Direct engineering ties with Zhejiang University.
ISO9001:2015, EU RoHS, and US UL Certification.
A technical assessment of safety, material durability, and market growth
The international commercial and residential heating, ventilation, air conditioning, and refrigeration (HVAC/R) industry is undergoing a critical transition in piping assembly and pipeline connection technology. Traditional field brazing, which requires high temperatures and open flames, presents significant liability, requires highly skilled labor, and risks heat-induced oxidation inside lines, which can lead to premature compressor wear.
To mitigate these risks, engineering specifications are increasingly moving toward HVAC Propress system connections. Originally developed for plumbing applications, press-connect systems have been structurally modified and engineered to withstand the unique requirements of refrigerant gas lines. By utilizing engineered copper fittings containing specialized elastomeric sealing rings, technicians can create permanent, leak-proof metal connections in seconds using calibrated press tools.
The global mechanical press fittings market is projected to expand at a CAGR of 6.2% through 2030, driven by commercial retrofits and rising labor costs across North America and Europe.
Modern propress systems conform to rigorous standards, including ASME B31.5 for refrigeration piping, UL 109, and ICC-ES PMG certifications.
Precision-drawn C12200 deoxidized high-phosphorus copper combined with synthetic O-rings (such as HNBR or FKM) ensures stable operation under critical pressures exceeding 700 PSI.
Global HVAC system manufacturers and mechanical contractors face volatile supply chains and rising quality standards. To remain competitive, procurement agents prioritize factories with proven quality control and scalable production capacity.
Partnering with Ningbo Taojun provides strategic access to reliable, certified manufacturing. Since 2012, we have supplied prominent home appliance giants, including Haier, Xinfei, Midea, Gree, Whirlpool, Electrolux, and Huarui. Our global logistics network spans North America, South America, Europe, the Middle East, Southeast Asia, and Africa.
"By establishing high-precision automated production lines and standardized raw material sourcing, Taojun supports global buyers with stable, scale-ready supply chains that consistently meet strict performance specifications."
Exploring our automated machining, clean testing labs, and raw material warehousing
Combining German precision engineering with automated factory intelligence
We utilize an integrated Manufacturing Execution System (MES) to track raw materials, schedule machining operations, and record quality inspection data in real time, ensuring full batch traceability.
Our core production processes utilize imported German manufacturing machinery, which maintains tight tolerances within ±0.02 mm across high-volume production runs.
Our Quality Management System operates with 5D control methodology. We maintain a defect rate below 0.05%, backed by ISO 9001:2015, IATF 16949, and US UL certifications.
We prioritize environmental responsibility. Our products conform to the EU RoHS and REACH directives, ensuring they are free of restricted heavy metals and hazardous substances. We use 100% recyclable packing materials to minimize environmental impact across the supply chain.
Customer Satisfaction Rating (2023)
Helium Mass Spectrometer Testing
Thermal Shock Testing (-35°C to 75°C)
Rapid Customer Inquiry Support
Liquid line filter driers are critical to maintaining the lifetime of HVAC compressors. Moisture ingress can cause acid formation, oil degradation, and copper plating inside the compressor.
Over 35 years of engineering progress, collaborative research, and expansion
1998
Expanded domestic production facilities to supply major Chinese home appliance brands.
2008
Implemented smart workshop management and advanced ERP systems to support scale operations.
2024
Upgraded robotic assembly capabilities to meet rising global demand for HVAC propress fittings.
At Ningbo Taojun, our growth is guided by four core values: Honesty, Innovation, Responsibility, and Cooperation.
Ensuring system performance across residential, commercial, and industrial HVAC/R configurations
Ensures refrigerant containment in domestic refrigerators, deep freezers, and ice makers. Fits compact layouts and reduces compressor vibrations.
Protects medium and low-temperature cold rooms and refrigerated transport. High chemical resistance prevents corrosion in humid environments.
Provides critical seals for multi-compressor racks, large water-cooled chillers, and chemical heat exchange processes under high pressure.
Ningbo Taojun's operations conform to standard GB/T19001-2016/ISO9001:2015 under registration number 41325Q00065R0S. This registration is verifiable through the Certification and Accreditation Administration of the People's Republic of China (CNCA).
Our certification scope includes the design, manufacturing, and distribution of filter driers, condensers, access valves, and related refrigeration copper fittings. This validation supports our OEM and ODM services for global buyers seeking reliable components.
Quality Certificate
Registration Scope
From pre-sales system layout to after-sales performance monitoring
We provide consultation support backed by our technical team to assist clients with product configuration, materials selection, and system planning.
We construct prototypes, configure tools, and verify performance under custom requirements to support quick turnaround for new configurations.
We offer technical support throughout the product lifecycle, including installation guidance, performance reviews, and technical consulting.
Addressing design standards, pressure capacities, and material validation requirements
Refrigerant press-connect systems use mechanical deformation to form a tight seal. When a calibrated tool is cycled, the fitting is deformed into a hex-like structure. This compresses the internal elastomeric O-ring (typically HNBR or FPM/FKM) against the tube wall, creating a seal rated for typical HVAC pressures exceeding 700 PSI.
Yes. Yellow brass and deoxidized high-phosphorus copper are compatible in standard HVAC/R refrigerant lines. The metals have similar electrochemical potentials, preventing galvanic corrosion under typical operating conditions. It is critical to verify that any brass components are lead-free to comply with regional drinking water and industrial health standards.
Sizing is determined by refrigerant type, mass flow rate, liquid temperature, and system volume. Desiccant capacity (e.g., 10g, 15g, or 30g) must be matched to potential moisture levels, while the flow rate must not cause a pressure drop of more than 0.07 bar (1 PSI) across the drier block.
All refrigeration parts undergo vacuum oven drying. Filter driers are sealed immediately after assembly. Representative production samples are subjected to dew-point testing to verify that internal moisture remains below 10 ppm.
Yes, flame-free connections are preferred for A2L and A3 refrigerants (such as R32, R454B, and R290). Because these refrigerants carry mild flammability risks, propress systems eliminate the need for open-flame brazing during service, reducing safety hazards on site.
Browse our catalog of control boards, custom copper lines, and specialized HVAC/R valves
Taojun
