Engineered for seamless liquid control, moisture filtration, and high-pressure system stability.
Ningbo Taojun Refrigeration Equipment Co., Ltd. is strategically situated in Xiangshan, Ningbo, a prominent coastal industrial hub in Zhejiang. Founded in 1988, our operational foundations trace back to the esteemed Xiangshan Refrigeration Accessories Factory of Zhejiang University. Over the course of nearly four decades, Taojun has evolved from a local manufacturing workshop into a comprehensive high-tech enterprise. Today, we specialize in design, advanced product development, massive scale production, and dynamic global sales networks.
In 2021, Taojun was recognized as a National High-Tech Enterprise, cementing our standing as an industry leader. Our primary catalog highlights state-of-the-art copper filter driers, check valves, air conditioning valves, high-efficiency wire condensers, brass fittings, customized copper propress accessories, and refrigeration cable ties. Our proprietary "Lingshan" brand represents high reliability and technological innovation throughout domestic and international cold-chain and HVAC piping networks.
Evaluating the industrial shift toward flame-free installation, strict environmental requirements, and smart system components.
Traditional brazing and welding methods present clear challenges in modern industrial construction: hot work permits, fire hazards, extended labor requirements, and variable system integrity. The global refrigeration and HVAC sector is rapidly transition to mechanical press-connect (propress) technologies.
By utilizing high-purity C12200 copper piping coupled with engineered elastomeric O-rings (such as HNBR or EPDM tailored for specific refrigerants like R410a, R134a, and newer HFO blends), propress installations reduce system commissioning time by up to 60%. China’s top manufacturing sectors are leading this transformation, producing reliable press fittings that support maximum system pressure up to 700 PSI without structural failure.
International environmental mandates, including Europe's F-gas regulations and the Kigali Amendment, require hermetically sealed components with zero leak rates. Our filter driers, check valves, and copper fittings undergo helium leak testing down to 1x10⁻⁸ mbar·l/s. By incorporating desiccant cores made of 3A molecular sieves, we ensure minimal moisture presence, mitigating acid formation that could cause premature compressor failure in variable-refrigerant-flow (VRF) and commercial cold storage installations.
From raw copper processing to micro-structural validation, our products meet rigorous engineering tolerances.
TAOJUN copper filter driers are designed to absorb moisture and acid, and to filter out physical impurities. Commonly installed in residential refrigerators, commercial freezers, and industrial HVAC setups, our filter driers feature:
Beyond filtration, our product catalog supports the complete refrigeration cycle with access valves, copper U-bend fittings, equal-Tee joints, inverter control PCB assemblies, condenser modules, and multi-layered charging hoses.
Operational snapshot of our automated factories and high-precision testing rooms.
Highly controlled metal flow ensuring consistent wall thickness across all copper fittings.
Sealed filling lines prevent atmospheric moisture from saturating the desiccant before final sealing.
Provides high mechanical strength and leak resistance under thermal expansion cycles.
Detects micro-leaks down to the molecular level to ensure lasting performance in closed-loop systems.
Visual validation and chemical tolerance checks before worldwide export packaging.
Demonstrating manufacturing expertise, strict material sourcing, and thorough reliability testing.
Our core manufacturing and assembly equipment is imported directly from Germany, ensuring precise dimension control and dimensional stability.
Our R&D team includes 15 experienced engineers, with key specialists from the University of Science and Technology of China.
We offer flexible sizing, customized geometries, and bespoke packaging configurations. We collaborate with clients to turn conceptual sketches into functional prototypes.
Our raw materials are sourced from reliable manufacturers. Raw film and liquid crystal spacers are imported directly from Japan; industrial adhesives are sourced from Europe, maintaining performance up to 90°C.
Finished items undergo high/low temperature tests (75°C to -35°C for 500 hours), thermal shock tests (10°C to 90°C), and 24-hour electrical aging tests under 100V.
Strategic development stages mapping the transition from traditional brazed connections to smart, tool-pressed HVAC technologies.
Applying C12200 deoxidized high-phosphorus copper to prevent hydrogen embrittlement. Standardizing elastomer gaskets to remain chemically inert when in contact with complex refrigerants (such as R32, R454B, and CO2).
Refining propress metal shaping to incorporate dual-crimp geometry. This design helps secure the pipe joint on both sides of the O-ring bead, preventing rotational slippage and ensuring leak-free performance under pressure surges.
Integrating RFID tags and micro-sensors within critical piping nodes. This allows engineers to track installation history and monitor vibration, pressure levels, and temperature changes in real time.
How our refrigeration components perform under real-world operating conditions.
From supermarkets with long cooling display lines to industrial chemical cooling systems, our filter driers and propress fittings prevent system contamination and leaks. They are designed to withstand high pressure changes, ensuring reliable fluid control.
By working closely with leading global brands such as Haier, Midea, Whirlpool, Electrolux, and Gree, Taojun designs components that integrate seamlessly with various compressor models and evaporator designs.
Visualizing our ISO-9001 certified manufacturing plant in Zhejiang, China.
Ningbo Taojun Refrigeration Equipment Co., Ltd. has developed leading capabilities in refrigeration design. Our factory spans modern workshops equipped with automated fabrication machinery, active dust control filters, and CNC shaping systems. Our integrated MES system manages the entire workflow from raw material inspection to final packaging.
1998 Base
MES Integration
2024 Upgrades
Our manufacturing processes follow strict quality management systems. We hold certificate GB/T19001-2016 / ISO9001:2015 (Registration No.: 41325Q00065R0S), verifying our capabilities in design, assembly, and testing of HVAC components.
Quality Certificate
Certification Scope
Clients can verify our registration credentials on the official Certification and Accreditation Administration of China (CNCA) portal (www.cnca.gov.cn) or via partner agency Zhongci International (www.zcgirz.com).
- Comprehensive engineering consulting backed by 15 years of technical experience in fluid dynamics and pressure systems.
- Tailored design services matching components to client specs.
- 24-hour service line with technical replies guaranteed within 8 hours.
- Installation guides, training materials, and performance reviews.
- Troubleshooting and system optimization support.
- Standard one-year warranty on all catalog products, with ongoing technical assistance.
Over three decades of development and technical growth.
Founded as the Xiangshan Refrigeration Accessories Factory of Zhejiang University, focusing on copper component fabrication.
Implemented MES intelligent workshop management system, transitioning to digital control for high production accuracy.
Expanded automation lines and high-speed press-fitting production to meet global export demand.
We believe that a global brand is built on a strong corporate culture. We focus on integrating core values—Honesty, Innovation, Responsibility, and Cooperation—into our daily operations.
Honesty: We prioritize reliable management and product quality, building long-term relationships with clients.
Innovation: We continually update our concepts, manufacturing technology, and quality controls.
Responsibility: We maintain strict performance standards to support the safety and longevity of refrigeration systems.
Cooperation: We collaborate with clients to optimize design choices and achieve efficient production outcomes.
Precision replacement parts and assembly-line components matching international system standards.
Detailed answers to technical questions about refrigeration loop performance, mechanical joints, and factory OEM sourcing.
Taojun