Explore our high-performance standard filter driers designed to absorb trace moisture and eliminate solid particles before they compromise compressor health.
Strategic deployment of refrigeration technologies in South-Eastern Europe’s growing industrial hubs.
Bulgaria’s strategic position within the European single market has made it a crucial transit corridor and assembly base for global heating, ventilation, air conditioning, and refrigeration (HVAC-R) systems. Regions such as Plovdiv, Sofia, and Varna are seeing substantial investments in logistics networks, modern cold chains, and automotive climate system manufacturing.
As European Union environmental guidelines demand stricter control over F-gas emissions and refrigerant containment, the quality of hermetic seals and filtration components like liquid line filter driers is paramount. Manufacturers in Bulgaria face pressing needs to supply robust refrigeration setups compatible with low-GWP (Global Warming Potential) refrigerants like R32, R290 (propane), and CO2 (R744).
Taojun Refrigeration fills this supply loop by delivering precision-engineered copper filter driers and solid core filtration blocks that prevent acid buildup and system failure. Our technologies support Bulgarian industrial facilities in maintaining EU safety compliance while optimizing operational efficiency.
Over three decades of manufacturing mastery in specialized refrigeration parts
Located in Xiangshan, Ningbo, a beautiful tourist city, our company was founded in 1988. Its predecessor was the Xiangshan Refrigeration Accessories Factory of Zhejiang University. Over more than 30 years of development and expansion, Taojun has grown into a comprehensive enterprise integrating design, research and development, manufacturing, and international sales.
In 2021, Taojun was designated a national high-tech enterprise, validating our focus on technological innovation, equipment enhancement, and scientific management. Our lead product lines encompass liquid line filter driers, check valves, condenser coils, air conditioning service valves, and custom copper/brass pipe connections.
Under the famous domestic brand "Lingshan", our filtration systems have established reputation for reliability. Our management systems are fully certified with ISO9001:2008 / ISO9001:2015, EU ROHS directives, and US UL certifications.
Providing custom components and repair solutions for household and industrial systems
We leverage high-density 3A molecular sieve desiccant (water absorption ≥20%) combined with an activated carbon matrix to capture acids, wax, sludge, and microscopic particulates.
Our bodies are shaped from high-purity copper piping using precision spinning and automated argon-arc welding to guarantee zero-leak joints under extreme pressure.
Perfect for household refrigerators, commercial cold storage chambers, transport refrigeration, and domestic air conditioner repair/OEM production.
Technological differentiation and rigorous quality assurance setting us apart globally
Our core production machinery is imported directly from Germany, ensuring precise metal fabrication tolerances (±0.02mm) and long-run consistency.
With roots as a Zhejiang University affiliate factory, we employ 15 research engineers in our R&D center holding advanced degrees in thermal physics and materials science.
Custom sizing, specialized connection joints (ODF solder or SAE flare), and custom branding are easily accommodated with low entry MOQs (500 units).
Copper tubes, molecular sieves, and brazing materials undergo spectral analysis. High-temp protective layers endure extreme thermal ranges without deteriorating.
Thermal shock tests (10°C–90°C), 500-hour damp heat exposures, and 100V high-voltage insulation tests for electrical parts ensure stable system operation.
Finished filter driers are subjected to helium mass spectrometer leak testing and specialized vacuum ovens to assure total internal dry state before shipping.
A timeline of constant upgrading, modernization, and market growth
Factory Expansion: Established dedicated factory buildings, scaling up production of copper filter driers and service valves for early home appliance clients.
Intelligent Management: Introduced MES intelligent workshop systems, integrating CCD visual testing systems and automated quality monitoring protocols.
Globalized Delivery: Expanded localized service capabilities, targeting European logistics hubs with specialized green product packaging and quick delivery.
A world-class brand is built on a foundation of professional dedication, cooperative ethics, and deep engineering standards. At Taojun, our internal culture revolves around four central values:
We follow transparent manufacturing operations and quality reporting, which serves as the core of our relationships with global appliance giants.
Innovation allows us to adapt to global refrigeration transitions, such as developing molecular sieves optimized for eco-friendly refrigerants.
We aim for sustainable HVAC-R assemblies, compliant packaging, and minimal raw material waste during processing.
Our filter driers and connection valves are found across domestic and heavy commercial systems
A client-first approach to project evaluation and support
Our quality verification processes and structural certifications
Verifiable quality systems for filter driers, condensers, and access valves.
Ningbo Taojun Refrigeration operates under registration number 41325Q00065R0S, authorized through Zhongci International (ZCGI) and CNCA China. Our production flow follows rigorous component traceability pathways, covering:
UL Certificate
RoHS Compliant
CE Standard
ISO registration
Inside our high-tech manufacturing, assembly, and quality verification lab spaces
Explore our extensive catalog of installation, maintenance, and system optimization accessories.
Essential tooling and high-strength joining alloys for leak-proof brazing
Optimized for R134a/R600a refrigerants in modern ice makers.
Lightweight design for specialized aerospace and automotive climate modules.
OEM replacement units for residential refrigeration service applications.
Get professional advice on choosing, installing, and maintaining drier units in refrigeration loops
Whether you require custom OEM designs for manufacturing facilities in Bulgaria, or high-volume standard component deliveries, our engineers are here to assist.
Taojun
