Explore our heavy-duty industrial refrigeration and control assembly parts, manufactured with premium C12200 deoxidized copper.
Ningbo Taojun Refrigeration Equipment Co., Ltd. is located in the scenic industrial node of Xiangshan, Ningbo. Established in 1988, our structural lineage began as the Xiangshan Refrigeration Accessories Factory of Zhejiang University. Over the past 30 years, we have transitioned into a modernized high-tech enterprise focusing on flow regulation solutions, custom copper valves, check valves, and filter driers.
Our facility operates under rigorous ISO 9001:2015 specifications. With a technical core derived from institutional research and development, we specialize in high-pressure sealing components capable of resisting structural fatigue under extreme cycles, ensuring zero leakage in cooling networks worldwide.
Years in R&D and Manufacturing
Quality Certified Factory
In industrial cooling, split valves act as primary isolation and regulation points. B2B procurement managers from top home appliance conglomerates (including Haier, Midea, Whirlpool, and Electrolux) face strict reliability requirements. The rise of low-GWP (Global Warming Potential) refrigerants like R32, R454B, and natural hydrocarbon R290 has fundamentally changed pressure dynamics, requiring higher mechanical tolerances.
Premium split valves must offer zero-leak performance at up to 4.5 MPa to prevent refrigerant loss and environmental contamination. Our copper split valves are manufactured from oxygen-free, high-conductivity (OFHC) copper alloys (typically C12200), ensuring excellent thermal performance, corrosion resistance, and structural integrity during field brazing operations.
Large HVAC installations require modular components that simplify field maintenance. By using split valve assemblies with integrated charge ports, technicians can charge, recover, or monitor refrigerants without disrupting main line connections.
Our factory provides custom split valves configured to match multi-split VRF systems, precision air conditioning units, and light commercial cold-chain systems. By optimizing internal flow channels, these valves reduce pressure drops by up to 12%, directly contributing to higher Seasonal Energy Efficiency Ratio (SEER) ratings for the complete equipment.
A closer look at how Taojun combines high-grade copper with advanced testing metrics to deliver reliable split valves and copper accessories.
Every production batch of copper split valves and filter driers undergoes a rigorous qualification testing program. We use imported German testing equipment to perform helium mass spectrometer leak detection down to 1x10-8 mbar·l/s.
Thermal shock testing is conducted across cycles ranging from -40°C to +120°C, and damp heat tests are maintained for 500 hours to verify seal performance. The interior of our copper components undergoes automated vacuum dehydration in specialized industrial ovens to eliminate moisture and prevent ice blockages in capillary lines.
Ningbo Taojun ensures high production rates and consistent quality through automated lines and advanced design tools.
We use automated cutting, forming, and welding lines imported directly from Germany to maintain tight tolerances within ±0.02mm.
Our engineering team includes industry professionals and professors collaborating to develop next-generation natural refrigerant flow systems.
From chemical testing of incoming raw copper tubing to final high-pressure nitrogen charge checks, we implement complete quality control.
Automated manufacturing and component assembly line.
Ultrasonic degreasing and surface conditioning stations.
Destructive burst testing and microstructural analysis.
Review the milestones that shaped Ningbo Taojun into a national high-tech enterprise.
Formed as Xiangshan Refrigeration Accessories Factory, starting a technical partnership with Zhejiang University.
Implemented the MES intelligent workshop management system, upgrading component manufacturing traceability.
Established Ningbo Taojun Refrigeration Equipment Co., Ltd., launching the "Taojun" brand for condensers and valves.
Expanded manufacturing facilities to supply critical HVAC/R products to partners worldwide.
Through our logistics and distribution network, we supply components to major production sites in Europe, the Americas, Southeast Asia, and the Middle East. Our product development is guided by core values focused on quality, reliability, and close cooperation to help customers improve system performance and efficiency.
Our copper split valves and filter driers are designed to support a wide range of refrigeration setups.
Our split valves provide positive refrigerant shutoff, allowing technicians to isolate pressure loops during compressor changeouts or system upgrades. The deoxidized copper body handles thermal expansion, minimizing stress on brazed joints in heavy industrial applications.
Combined with our high-capacity copper filter driers, our system solutions capture residual moisture, acids, and debris to prevent capillary restrictions and compressor oil breakdown, helping to extend the operational life of the equipment.
Review the ISO 9001:2015 certifications and regulatory approvals that back our manufacturing processes.
Ningbo Taojun Refrigeration Equipment Co., Ltd. operates under official GB/T19001-2016/ISO9001:2015 registration (Registration No.: 41325Q00065R0S). This certification covers our design, development, and fabrication procedures for copper filter driers, condensers, access valves, and split-system accessories.
Our manufacturing processes are fully compliant with RoHS and REACH regulations, matching the environmental standards required for European and North American projects.
Our certifications are traceable via the Certification and Accreditation Administration of the People's Republic of China (CNCA) portal (www.cnca.gov.cn), validating our capabilities as an OEM/ODM partner.
Key information regarding our procurement terms, design support, and copper split valve specifications.
We use deoxidized high-phosphorus copper (specifically alloy grade C12200, matching international standards ASTM B280 and EN 12735-1). This alloy is selected for its high copper purity (99.9% minimum) and phosphorus content, which prevents hydrogen embrittlement and ensures strong brazed joints.
Yes. Our valves are designed for high-pressure applications, with operating limits up to 4.5 MPa (45 bar) and testing pressure thresholds up to 6.5 MPa. This makes them fully compatible with modern refrigerants such as R410A, R32, R407C, and low-GWP alternatives.
We support complete OEM and ODM design processes, including custom connection sizes (both metric and imperial), special capillary shapes, integrated charging ports, and custom bracket configurations.
Our factory implements a comprehensive testing routine: 100% helium mass-spectrometer leak testing, pressure burst tests, and a 24-hour heat-soak aging cycle. Every batch is cataloged via our MES database for full quality traceability.
Explore our full selection of refrigeration accessories, vacuum pumps, and specialized valves.
Taojun