Industrial-grade copper filter driers, brass brazing systems, and robust copper tubes engineered for high-pressure systems.
Ningbo Taojun Refrigeration Equipment Co., Ltd. is located in Xiangshan, Ningbo, a prominent center for advanced industrial manufacturing in China. Founded in 1988, our company originated from the Xiangshan Refrigeration Accessories Factory of Zhejiang University. Over three decades, we have evolved from a specialized academic research partner into a global engineering and manufacturing powerhouse.
Today, Taojun stands as a national high-tech enterprise. Our comprehensive core portfolio comprises filter driers, check valves, air conditioning valves, high-performance condensers, copper & brass accessories, and heavy-duty AC binding tapes. Engineered under our flagship brand "Lingshan", our products serve domestic and international markets with certified reliability.
Certified Verification Profile:
Official Registration: GB/T19001-2016 / ISO9001:2015 (Reg No: 41325Q00065R0S). Fully certified to meet EU ROHS Environmental Directives and United States UL safety standards. Verified by Zhongci International.
Decoding the critical demands of HVAC/R OEMs and industrial distributors in fluid cleanliness and hermetic integrity.
In modern systems utilizing HFC and HFO refrigerants (like R134a, R410A, and R32), moisture leads to oil hydrolysis, producing harmful organic acids. Taojun filter driers integrate high-purity 3A molecular sieves to ensure water retention even at high temperature levels.
With R744 (CO2) and modern high-pressure refrigerants operating at elevated stress points, copper filter drier housings must withstand bursting pressures exceeding 500 PSI. Our automated extrusion and deep drawing ensure zero wall thinning.
OEM brands (such as Haier, Whirlpool, and Electrolux) require certified compliance. We run an active MES (Manufacturing Execution System) tracking raw material batches, gas leak test certifications, and thermal cycle test results.
The global push toward eco-friendly refrigerants and energy-efficient compressors demands superior desiccant efficiency. Contaminants must be filtered down to the micron level to protect variable-speed scroll and rotary compressors from premature wear, making precision-crafted filter driers a necessity rather than a commodity.
Step-by-step evolution of manufacturing technology and rigorous laboratory protocols to verify lifetime stability.
Established as Xiangshan Refrigeration Accessories Factory of Zhejiang University. Dedicated to thermal science applications, flow mechanics, and copper metallurgy, setting the technological foundation for our copper filter driers.
Constructed dedicated factory facilities to scale up manufacturing, introducing automated deep-drawing hydraulic presses and multi-station copper tube processing lines to support domestic home appliance OEMs.
Implemented our MES (Manufacturing Execution System) and automated helium leak detection. This integration ensured that every single copper filter drier and access valve undergoes leak verification prior to packaging.
Certified as a National High-Tech Enterprise, expanding active product lines to smart refrigeration valves and low-GWP compatible desiccants. Partnered with global brands across 50 countries for sustainable development.
| Quality Assurance Phase | Inspection Protocol & Standards | Acceptance Target & Metrics |
|---|---|---|
| Raw Material Assessment | High-purity phosphorus-deoxidized copper (C12200) composition test, Japanese imported ITO check. | Pure Copper composition ≥ 99.9%, zero micro-fractures, structural uniformity. |
| Desiccant Pre-Bake & Load | High-temp oven drying of 3A molecular sieve beads to expel moisture. | Water adsorption capacity ≥ 20% of dry weight. |
| Hermetic Integrity Testing | Dual-pressure high-voltage testing and high-sensitivity chamber helium leak detection. | Zero leakage at pressure up to 500 PSI, verified bubble-free. |
| Reliability & Environmental | Thermal shock testing (-35°C to 75°C for 500 hours), RoHS chemical trace scan. | 100% compliant with RoHS & REACH limits. No structural degradation. |
Deploying state-of-the-art copper drying filters and HVAC/R access fittings across diverse operational ecosystems.
Our solutions cater directly to three key areas in the commercial and domestic cooling sectors:
Take a look inside our high-performance manufacturing plant, specialized laboratories, and certified processes.
GB/T19001-2016 / ISO9001 Certificate
Scope of Certification Document
UL Safety Verification
ISO Registration Main Page
Providing global engineering support from pre-purchase consultation through long-term product lifecycles.
Our sales engineers offer technical assistance, helping select products based on heat exchanger surface calculations, refrigerant type, and oil chemistry.
We maintain an active service line, responding within 8 hours. Customized CAD drawings, thermal capacity charts, and pressure drop estimations are provided upon request.
We offer a 1-year product warranty. In the event of system failures caused by filtration anomalies, our troubleshooting team provides analytical support to resolve issues quickly.
Expert answers to the most common engineering and procurement questions regarding copper drying filters.
Explore our selection of access valves, low-temp brazing rods, Bundy tubes, and system accessories.
Taojun