Explore our premium product portfolio designed for high efficiency, complete moisture absorption, and absolute sealing integrity across refrigeration and HVAC loops.
Ningbo Taojun Refrigeration Equipment Co., Ltd. is located in Xiangshan, Ningbo, a major coastal industrial hub in China. Founded in 1988, our predecessor was the Xiangshan Refrigeration Accessories Factory of Zhejiang University. Over the past 35+ years, we have evolved into a national high-tech enterprise specializing in the R&D, precision manufacturing, and global distribution of refrigeration accessories.
Our core product lineup includes filter driers, check valves, air conditioning valves, wire-tube condensers, brass/copper fittings, and professional installation materials. Backed by key partnerships with global giants like Gree, Midea, Haier, Whirlpool, and Electrolux, we maintain robust systems certified to ISO 9001:2015, EU RoHS, and US UL safety guidelines.
“Empowered by research ties with leading institutions, we deliver a 0.05% factory defect rate to protect your compressor warranties.”
Our facilities integrate MES intelligent workshop management, automatic double-ended copper cutting systems, and high-purity argon arc welding stations to ensure complete molecular sieve integrity. Watch our production processes, raw material testing, and trace helium leak-testing lines operating under standardized quality protocols.
Understanding how Ningbo Taojun copper filter driers protect system expansion valves and compressors from premature wear, ice blockages, and acid corrosion.
We load our shells with 100% pure 3A Molecular Sieve beads. With a water absorption index exceeding 20%, they select water molecules exclusively (diameter < 3 Å) while ignoring refrigerants like R134a, R410A, or R290, ensuring high-capacity dehumidification.
Our filter drier shells are cold-drawn from TP2 deoxidized copper. This offers high burst pressure capacity (>100 bar), excellent weldability, and resistance to formicary corrosion caused by acidic moisture-oil mixtures.
Dual fiberglass filters paired with fine stainless steel meshes block micro-particles down to 50 microns. This keeps capillary tubes, thermostatic expansion valves (TXV), and compressor pistons clear of metal filings.
How Ningbo's industrial ecosystem and Taojun’s vertically integrated facilities translate to stable prices, lower risk, and consistent product quality.
Located near the Ningbo-Zhoushan Port, the world's busiest port by cargo volume, we offer direct ocean freight routes to global destination ports. This cuts down inland shipping costs and guarantees delivery within 72 hours for critical stock items.
Zhejiang Province houses the world's most concentrated copper smelting and extrusion cluster. By sourcing raw copper tubes, brass rods, and molecular sieves locally, we secure stable material costs and keep lead times short, even during high market volatility.
Built on technology developed at the Xiangshan Refrigeration Accessories Factory of Zhejiang University, our engineers collaborate with national science centers to optimize fluid dynamics within refrigeration lines, reducing pressure drop across filter shells.
The global shift towards climate-friendly refrigerants and smart automation systems has redefined requirements for standard copper components.
R290 (propane), R32, and high-pressure R744 (CO2) systems run hotter and under higher pressures. Our filter shells are engineered to withstand up to 120 bar without rupture, and we use synthetic polyolester (POE) oils to prevent desiccant breakdown.
Our workshop integrates MES management, allowing barcode tracking from the raw copper coil to the pressurized helium leak-tester. This ensures 100% batch traceability for commercial air conditioning projects.
By blending activated alumina with molecular sieves, our dual-action cores capture both organic acids and moisture. This prevents acid corrosion on compressor motor windings and protects modern scroll compressors.
We enforce strict quality control measures from raw material arrival to final product dispatch, ensuring compliance with international safety and environmental codes.
Ningbo Taojun Refrigeration Equipment Co., Ltd. is officially certified under GB/T19001-2016/ISO9001:2015 (Registration No.: 41325Q00065R0S) for the design and production of filter driers, condensers, and access valves. This certification is registered with China’s CNCA (www.cnca.gov.cn) and audited by Zhongci International Certification (www.zcgirz.com).
Our quality control workflow includes raw material verification, process audits, and 100% inline testing to ensure zero-defect exports to Europe, the Americas, and Southeast Asia.
Our filter driers and copper accessories are used worldwide in domestic, commercial, and industrial thermal management projects.
Our 10g and 15g copper filter driers are key OEM parts for home refrigerators. They absorb manufacturing moisture and prevent copper dust from plugging capillary lines, helping protect refrigerator systems for 10+ years.
In large supermarket display cases and cold rooms, our high-volume molecular sieve driers handle large refrigerant volumes, preventing compressor shutdown caused by oil breakdown and acidity.
Designed to handle high vibrations and variable heat loads, our customized copper accumulators and receivers resist mechanical wear in passenger cars, electric vehicles, and heavy transport refrigeration units.
Take a virtual tour of our production departments, quality testing labs, and raw material storage areas.
Over nearly four decades, Ningbo Taojun has evolved from a small university-affiliated workshop into a major supplier for global home appliance brands. Our growth is built on continuous technological updates:
Detailed technical answers to common questions about molecular sieves, pressure limits, and chemical compatibility in HVAC/R systems.
Browse our complete catalog of copper components, brass fittings, and accessories designed for commercial and domestic cooling loops.
Taojun
