Explore our engineered refrigeration and HVAC piping components, crafted under strict tolerance specifications for premium performance.
The global Heating, Ventilation, Air Conditioning, and Refrigeration (HVAC/R) industry is undergoing a structural transition driven by environmental mandates, energy efficiency initiatives, and technological advancements. At the heart of these complex systems are brass fittings and copper piping components. These joints, adaptors, and valves must withstand rising operational pressures, wider temperature fluctuations, and alternative refrigerant chemistry.
Historically, standard brass formulations sufficed for general plumbing and basic low-pressure R-22 refrigeration setups. However, the regulatory phasedown of hydrofluorocarbons (HFCs) under the Kigali Amendment has accelerated the adoption of natural alternatives such as carbon dioxide (R744), propane (R290), and HFO refrigerants.
For procurement teams and HVAC manufacturers, selecting the right China-based supplier is no longer just about minimizing unit cost. It requires verified metallurgic safety, conformity to international standards (ASTM, EN, DIN, and JIS), robust OEM/ODM capacity, and a transparent quality control protocol to guarantee leak-free system lifespans of 15 to 20 years.
Tracing 35 years of metallurgical innovation, manufacturing precision, and academic collaboration.
Established in 1988, the predecessor of Ningbo Taojun Refrigeration Equipment Co., Ltd. was the Xiangshan Refrigeration Accessories Factory of Zhejiang University. Over more than three decades, our company has evolved from a specialized academic workshop into a leading Chinese high-tech manufacturer specializing in copper filter driers, check valves, service/stop valves, condensers, and high-precision brass components.
Based in the industrial hub of Ningbo, China, our facilities run on advanced production technologies and management systems. In 2021, the company was officially accredited as a National High-Tech Enterprise in China. We sell under our renowned domestic brand "Lingshan", and have established strong international footprints. We operate as an OEM/ODM supplier for global home appliance brands like Haier, Midea, Gree, Whirlpool, Electrolux, and Huarui.
ISO 9001:2015
US UL Certified
EU RoHS Compliant
Founded as Xiangshan Refrigeration Accessories Factory of Zhejiang University.
Integrated MES intelligent workshop management system to track quality parameters.
Expanded capacity for eco-friendly lead-free brass components and natural refrigerant filter driers.
From standard capillary coils to customized service valves, we manufacture custom HVAC fittings for global clients.
Our core operations are optimized for high-purity copper and brass alloys. Each copper filter drier and access valve is manufactured using raw materials that are fully trace-compliant.
Why leading global refrigeration giants rely on our manufacturing infrastructure year after year.
Our core production units, custom forging machines, and high-frequency induction brazers are imported directly from Germany to ensure mechanical consistency and long-term part durability.
Backed by a research relationship with Zhejiang University, our engineering group comprises 15 specialists focused on thermodynamics, material physics, and fluid mechanics.
We work with complex, tailored CAD designs. We support specialized component shaping, customized logo engravings, and custom packaging. Minimum Order Quantities (MOQ) start from 500 units.
All process materials are trace-audited. Liquid crystal materials, high-performance glues, and specialty sealants are sourced from qualified suppliers in Japan and Europe to guarantee thermal stability up to 90°C.
Every design is subjected to rigorous high & low temperature testing (-35°C to 75°C for 500 hours), thermal shock cycles (10°C to 90°C), and 100V high-voltage insulation tests for electrical parts.
Our manufacturing lines integrate MES digital tracking, automated CCD visual inspections, and high-precision helium mass spectrometer leak detectors, keeping our defect rate below 0.05%.
A global brand built on impact, infiltration, and integration.
At Ningbo Taojun, our corporate culture guides our business operations. By fostering an environment of continuous improvement and engineering dedication, we deliver reliable value to our clients, employees, and community.
Quality comes first. We maintain strict compliance with ethical supply chains, environmental regulations, and material transparency.
We constantly adapt our manufacturing processes, upgrade our production machinery, and design new parts for eco-friendly systems.
We stand behind every component we ship, offering standard warranties and lifespans designed to match the target equipment.
Equipped with temperature-regulated manufacturing floors.
Robotic arm assembly for capillary joints and filter insertion.
Equipped with spectrographs and helium leak testers.
How our services are optimized for international supply chains and strict compliance protocols.
We assign a dedicated sales engineer to every international account, ensuring smooth communication from day one.
We provide comprehensive support throughout the entire lifecycle of our HVAC fittings to ensure optimal system performance.
Verifiable quality control frameworks to guarantee compliance with international safety and environmental regulations.
Ningbo Taojun Refrigeration is officially certified under GB/T19001-2016 / ISO9001:2015 (Registration No: 41325Q00065R0S) for the design, development, and production of filter driers, condensers, and access valves. This certification is registered and verifiable through the official website of the Certification and Accreditation Administration of China (CNCA).
In addition to our ISO framework, our products are certified to meet international environmental regulations:
Ensuring lead-free and cadmium-free raw brass alloys.
Parts are rated and certified for high-pressure systems.
ISO 9001 Main Document
Detailed Scope Document
How we are designing the next generation of HVAC/R fittings for a sustainable world.
With international regulations increasingly restricting lead content in brass fittings, our metallurgical labs are developing advanced bismuth-brass and silicon-brass alloys. These lead-free alternatives maintain excellent machinability and brazing characteristics without compromising strength.
R290 (Propane) and R744 (CO2) systems run at significantly higher operating pressures than traditional setups. We have optimized our wall-thickness profiles and copper alloy compounds to withstand burst pressures exceeding 120 bar, ensuring safety in CO2 applications.
Through our MES system, we are implementing smart IoT sensors across our CNC forging centers. This lets us monitor tool wear and dimensional precision in real-time, helping to prevent errors before they occur.
Direct, engineering-focused answers to the most common technical questions from procurement teams.
Get in touch with Ningbo Taojun's engineering team today for specialized CAD drawings, material testing, and competitive bulk pricing quotes.
Contact Our EngineersBrowse additional OEM components from our Ningbo factory, designed for split systems, commercial cold rooms, and appliances.
Taojun
