Ningbo Taojun Refrigeration Equipment Co., Ltd. is strategically situated in Xiangshan, Ningbo, a prominent coastal industrial hub in China. Founded in 1988, our structural roots stem directly from the Xiangshan Refrigeration Accessories Factory of Zhejiang University. Over more than three decades of focused expansion and technological iterative progress, the enterprise has developed from a dedicated academic component supplier into a national high-tech manufacturing leader integrating product design, deep R&D, mass production, global logistics, and comprehensive after-sales service systems.
Our facility was recognized as a National High-Tech Enterprise in 2021. Taojun is systematically committed to structural and process innovations, machinery iteration, and the adoption of modern, data-driven factory operating mechanisms. Under our registered domestic brand "Lingshan", we manufacture high-grade filter driers, check valves, air conditioning shut-off valves, condenser units, precision brass/copper connections, and insulation accessories.
We operate fully under the ISO9001:2008 / ISO9001:2015 Quality Management Framework, hold European RoHS environmental directive alignment certifications, and maintain structural approvals under US UL product safety standards. This systematic alignment ensures that each production batch matches standard engineering properties required by major HVAC OEMs worldwide.
Providing precision copper piping, fluid-control components, and filter systems for refrigeration loops worldwide.
At Taojun, our expertise is built upon 38 years of dedicated experience in refrigeration system component manufacturing. Our core offerings focus heavily on high-purity copper filter driers, designed explicitly to remove internal moisture, counter organic acids, and filter particulate contaminants down to microscopic dimensions. By avoiding component blockages, our components protect modern high-efficiency compressors from early mechanical failures.
Our factory leverages structured materials: shell structures made from high-purity copper pipe (grade C12200, rust resistant, high pressure resistant), inner desiccants containing 3A molecular sieve cores (water adsorption ≥20%) paired with activated carbon media layers, and precise sealing achieved via specialized inert gas and argon arc welding setups.
| Component Family | Material Grade / Base Standards | Core Functional Attributes |
|---|---|---|
| Copper Filter Driers | DHP Copper C12200 (ASTM B280) | 3A Molecular Sieve core, moisture adsorption ≥20%, 60-80 bar burst pressure |
| Refrigeration Access Valves | C3604 Brass / C12200 Copper Tube | Argon-arc sealed, leak rates below 1x10-7 mbar·l/s (helium tested) |
| Wire Tube Condensers | SPCC low carbon steel wire, copper coat | Multi-pass configuration, high corrosion resistance via electrophoretic paint |
| Copper Elbows & Fittings | EN 12735-1 Copper / C12200 | Wall thickness tolerances within ±0.02mm, bright annealed finish |
Additional manufacturing operations view: 
High-volume automated brazing machinery setup.
Our operational processes prioritize technology, equipment precision, and materials traceability.
Our core manufacturing equipment is imported directly from Germany, ensuring absolute stability during critical metal forming and extrusion processes. This reduces geometric variances across long production runs.
We operate a dedicated R&D center staffed by 15 specialist engineers, many of whom are doctoral researchers and professors from the University of Science and Technology of China (USTC). This academic foundation guides our thermodynamic designs.
We manufacture customized dimensions, wall thicknesses, connection ports, and configurations. We welcome engineers to share technical drawings to develop custom parts for unique system requirements.
Our ITO films (featuring zero shrinkage and high color consistency) and liquid crystal spacers are sourced from Japanese partners. Adhesives are sourced from Europe. Liquid crystal elements operate reliably at 70°C, protected by films rated for temperatures up to 80-90°C.
Finished items undergo comprehensive validation: high/low temperature testing (+75°C to -35°C for 500 hours), thermal shock trials (10°C to 90°C for 30 minutes), and damp heat testing for 500 hours. Active components undergo 100V high-voltage insulation tests to prevent electrical failure.
Global HVAC buyers favor Chinese copper manufacturing partners for several key operational advantages. The cluster effect in East China, specifically in the Ningbo-Zhejiang industrial belt, provides direct access to high-purity raw copper cathode markets, minimizing domestic transport costs.
Taojun combines cost efficiency with modern manufacturing systems. Our facility employs a dynamic MES (Manufacturing Execution System) and automated CCD visual inspection cameras to catch micro-fissures and wall-thickness anomalies early in production. This system ensures consistent output across high-volume runs.
Analyzing how our specialized copper solutions integrate into cooling infrastructures across diverse climates.
Large commercial HVAC systems require high-pressure piping solutions compatible with eco-friendly refrigerants like R32, R410a, and R290. Our thick-walled C12200 copper tubes offer high tensile strength to withstand high-pressure operations.
Food preservation and cold chain logistics require reliable protection against moisture-induced blockages. Our copper filter driers feature high-capacity 3A molecular sieves, capturing moisture before it can freeze and block expansion valves.
Vehicle environments subject refrigeration loops to continuous vibrations and thermal stresses. Our argon arc welded connections and certified copper fittings prevent joint leakage under dynamic automotive operating conditions.
From an academic research workshop to a high-capacity manufacturing center.
Our business began as the Xiangshan Refrigeration Accessories Factory of Zhejiang University, combining research expertise with practical production.
We introduced our MES intelligent workshop management system to track quality metrics and coordinate raw materials across production lines.
We expand international operations to supply key global home appliance brands including Haier, Midea, Whirlpool, Electrolux, and Huarui.
A global brand is sustained by its underlying corporate culture. We recognize that an effective corporate culture is established through Impact, Infiltration, and Integration. The development of our group has been guided by our core organizational values:
We prioritize people-oriented operations, integrity-driven management, and quality-focused business practices.
Innovation drives our product development and organizational adaptability, guiding our concepts, technology, and management systems.
We hold ourselves accountable to our clients and the industry, maintaining strict quality controls on each batch of products.
We foster professional collaboration to integrate resources and achieve mutually beneficial outcomes for our global partners.
A comprehensive look at our engineering facilities, certifications, and service structures.
We offer direct consulting and inquiry support backed by our 15 years of technical expertise. Clients work with dedicated sales engineers, supported by our 24/7 service line with an 8-hour response guarantee.
Our support includes technical training, installation assistance, troubleshooting, system upgrades, and a one-year warranty. We offer ongoing technical support throughout the product lifecycle based on client feedback.
Juntao Refrigeration (Ningbo Taojun) is certified under Chinese CNCA and international standards.
Juntao Refrigeration (NINGBO TAOJUN REFRIGERATION EQUIPMENT CO., LTD.) operates under verified quality control registrations. Holding formal GB/T19001-2016 / ISO9001:2015 registration (No. 41325Q00065R0S), we maintain quality controls across our filter drier, condenser, and valve manufacturing lines.
This certification is verifiable via China's official CNCA portal (www.cnca.gov.cn) and our audit partner Zhongci International (www.zcgirz.com). This verification supports our supply chain capabilities for global domestic appliance brands.
Main Certification Document
Detailed Scope of Certification
Company Certificates Frame
35+ years of R&D expertise with Zhejiang University collaboration.
ISO 9001, IATF 16949 certified; 5D quality system (0.05% defect rate).
50+ country network; partnerships with Haier, Midea, Whirlpool.
OEM/ODM support; 500-unit MOQ; 72-hour global delivery.
RoHS, REACH, WEEE certified; 100% recyclable packaging.
MES system, CCD visual inspection, helium leak testing.
98.6% satisfaction (2023); 24-hour complaint resolution.
±0.02mm aluminum foil tolerance; 10-year lifespan testing.
Smart product innovation; green manufacturing for industry sustainability.
Explore our integrated workshops, advanced laboratories, and high-efficiency assembly lines.
Browse our catalog of custom-engineered refrigeration and HVAC components.
Whitepaper: Technical, operational, and regulatory compliance standards for HVAC suppliers.
Modern industrial buyers require partners who can manage compliance, logistical scheduling, and quality assurance. Our processes are structured to meet the following industry standards:
Copper tubing must comply with ASTM B280 and EN 12735-1 specifications. We provide mill test reports (MTR) confirming chemical compositions, including copper content (≥99.9%) and phosphorous levels, as well as mechanical property data.
Modern HFC and HFO refrigerants are sensitive to internal contaminants. We limit internal residue to ≤0.038 g/m² and seal all tubing ends with caps immediately after manufacturing to prevent contamination during shipping.
With high-pressure refrigerants like R32 and CO₂ (R744) in use, copper components must handle elevated operating pressures. We perform pressure-testing up to 60-80 bar to verify the burst strength of our assemblies.
We operate automated packaging lines and offer flexible shipping arrangements from the Port of Ningbo, helping global buyers maintain stable stock levels.
Addressing common technical and quality assurance inquiries from system engineers.
Our product sales network covers major and medium-sized cities in China and is exported to Europe, America, South America, Southeast Asia, the Middle East, Africa and other overseas markets. The company's goal is to support and cooperate with every sincere customer to achieve a win-win situation.
Taojun
