High-performance refrigeration parts, connectors, and control boards designed for zero-leak operations
Within large-scale commercial HVAC and industrial refrigeration networks, system efficiency depends on the seamless movement of refrigerant under high pressure. Standard 7/8" (22.22 mm) ACR (Air Conditioning and Refrigeration) copper lines serve as vital liquid and suction lines. These components must withstand intense temperature swings, vibration, and chemical stress.
Moisture and contaminants are primary causes of premature compressor failure. Industrial cooling cycles require clean, dehydrated, and nitrogen-purged copper components. Without effective filtration, moisture reacts with synthetic POE (Polyolester) lubricants to form aggressive acids. These acids dissolve motor insulation and corrode internal copper surfaces, leading to system failure.
Over 35 Years of Engineering R&D in Partnership with Premier Research Institutions
Founded in 1988, Ningbo Taojun Refrigeration Equipment Co., Ltd. is located in the coastal city of Xiangshan, Ningbo. The company originated as the Xiangshan Refrigeration Accessories Factory of Zhejiang University. Today, Taojun is a comprehensive high-tech enterprise specializing in the design, development, production, and sale of refrigeration components.
Our core product line includes filter driers, check valves, air conditioning valves, condensers, brass and copper accessories, and HVAC cable ties. Under our well-known domestic brand "Lingshan" and our global brand "Taojun", we supply reliable components to global home appliance leaders such as Haier, Midea, Gree, Whirlpool, Electrolux, and Huarui.
Through technological innovation, production line upgrades, and strict compliance standards, Taojun has secured national high-tech enterprise status, alongside ISO9001:2015, EU RoHS, and US UL certifications.
A Technical Overview of Taojun Copper Filter Driers and Connector Fittings
Taojun copper filter driers are designed to absorb moisture and acids while filtering out micro-impurities from closed HVAC/R loops. Built for domestic and commercial refrigeration, our parts feature:
| Parameters | Standard Specifications | Testing Protocol |
|---|---|---|
| Material Grade | C12200 DHP Copper (≥99.9% Cu) | ASTM B280, EN 12735-1 |
| Desiccant Type | 3A Molecular Sieve + Active Carbon | Water absorption ≥ 20% by weight |
| Max Working Pressure | Up to 4.5 MPa (45 Bar) | Pneumatic & Helium leak tests |
| Joint Processing | Argon Arc Welded / Copper-to-Copper | Metallurgical joint inspection |
| Cleanliness Standard | ≤ 0.038 g/m² internal residue | Solvent extraction inspection |
A global brand is sustained by its corporate culture. We believe our culture is shaped through Impact, Infiltration, and Integration. The development of our group is driven by our core values: Honesty, Innovation, Responsibility, and Cooperation.
Honesty: We adhere to the principles of integrity management and quality first. Honesty is a key driver of our competitive advantage, guiding every step we take.
Innovation: Innovation is central to our group culture. We innovate across concepts, mechanisms, technology, and management, keeping our organization ready for emerging opportunities.
Responsibility: We maintain a strong sense of responsibility toward our clients and society, providing the driving force behind our continuous development.
Cooperation: Working together for a win-win outcome is a primary goal. Through collaborative partnerships, we integrate resources and leverage professional expertise.
State-of-the-Art German Machinery and Japanese Raw Materials Yielding a 0.05% Defect Rate
Our core manufacturing equipment is imported directly from Germany to achieve precise tolerances.
We have 15 engineers in our R&D centre, including doctors and professors from the University of Science and Technology of China.
Customized sizes, geometries, and shapes are available. We work with clients to develop tailored systems.
Our imported components ensure reliability and long-term durability:
Every batch undergoes rigorous quality assurance protocols:
Meeting European, American, and Asian Regulatory Standards for Large-Scale Supply Chains
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.
We innovate smart, green products that support HVAC/R industry sustainability. Our global logistics networks cover major markets in Europe, North America, South America, Southeast Asia, the Middle East, and Africa, helping customers optimize their supply chains.
Our official GB/T19001-2016/ISO9001:2015 certification (Registration No.: 41325Q00065R0S) guarantees quality in manufacturing filter driers, condensers, and access valves. Verifiable via CNCA (www.cnca.gov.cn) and Zhongci International (www.zcgirz.com).
Main Certification Document
Detailed Scope of Certification
Quality Certificate A
Quality Certificate B
Environmental Certificate
UL Certificate Reference
RoHS Compliance
Custom Engineering, Installation Audits, and Lifetime Technical Support
Engineering Insights for OEM Procurement Managers and HVAC Designers
A 3A molecular sieve has a pore opening size of 3 Angstroms. This is ideal for HVAC/R systems because it selectively adsorbs water molecules (pore diameter ~2.7 Å) without trapping refrigerants like R134a or R410A, which have larger molecular diameters. This ensures maximum drying efficiency without depleting or altering the refrigerant charge.
Our filters use C12200 high-purity copper shells, joined with precision argon arc welding instead of traditional brazing. Every unit undergoes automated helium leak detection and high-pressure pneumatic tests to guarantee hermetic seals up to 4.5 MPa.
Backed by our roots as a Zhejiang University research unit, our 15-engineer R&D center specializes in modifying length, diameter, and shape configurations. We support projects with low 500-unit MOQs and rapid 72-hour prototyping capabilities for global clients.
Yes. Our filter driers and copper components are designed to withstand continuous operating temperatures from -45°C to 120°C. They undergo rigorous damp-heat and thermal-shock testing (10°C to 90°C) to ensure structural integrity near high-temperature discharge zones.
All our products comply with the European RoHS environmental protection directive, REACH regulations, and WEEE requirements. Our materials are fully recyclable, and we use sustainable manufacturing processes to minimize carbon emissions.
High-efficiency heat exchangers, copper capillaries, and universal controllers for commercial systems
Universal Copper Refrigeration Filter Drier for Ice Maker Desiccant Dryer
Universal Industrial Dryer Filter Cartridge for Ice Makers
TAOJUN copper fittings for Refrigerator & AC
Factory Customized 10g 15g Welding Copper Filter Drier
Copper Accumulator/ mufflers/ Filter Drier for HVAC Parts
Custom Extruded Copper Drying Filters
Brass fittings for Refrigerator Freezer Parts
Air Conditioning Fitting Charging Hose Safety Valve
Aluminum Receiver Tank R134a R600a Liquid Receiver
Aluminium filter drier
Molecular sieve liquid line filter drier & Solid Core Filter Drier
Factory Double Copper Filter Drier for Air Conditioner
Copper Filter Drier 10g/15g/20g for Refrigerator Freezer
High performance industrial filter core
Precision brass adapter couplers
Integrated refrigeration system kit
Copper capillary connectors
Precision condenser components
Our sales network covers major Chinese cities and exports to Europe, the Americas, Southeast Asia, the Middle East, and Africa.
Taojun