Factory-direct wholesale refrigeration parts engineered for robust operational pressure handling and leak-free operations.
Founded in 1988, Ningbo Taojun Refrigeration Equipment Co., Ltd. began its journey as the Xiangshan Refrigeration Accessories Factory of Zhejiang University. Over more than three decades, our engineering-centric operation has evolved into a national high-tech enterprise, integrating advanced design, raw material metallurgy control, clean-room assembly, and global supply chain fulfillment.
Headquartered in the industrial hub of Xiangshan, Ningbo, our facility focuses on producing highly reliable system components. Under our signature "Lingshan" and "Taojun" brands, we manufacture high-capacity filter driers, HVAC propress fittings, access valves, liquid accumulators, service stop valves, and premium copper connection components. Our engineering foundation is backed by ISO 9001:2015, EU RoHS, and US UL certifications, ensuring that our products withstand the high pressures of modern eco-refrigerants.
Industry Experience
R&D Predecessor
Fully Certified
Our sales network spans across all major industrial clusters in China and extends globally to Europe, North and South America, Southeast Asia, the Middle East, and Africa. By acting as a key OEM/ODM manufacturing partner for household appliance brands like Haier, Midea, Gree, Whirlpool, Electrolux, and Huarui, we provide stable, scalable HVAC propress and copper accessory solutions that comply with international safety codes.
Engineered to eliminate system contamination and refrigerant leakage under extreme structural environments.
Our key metal forming, pipe bending, and high-frequency automated induction brazing machinery are imported directly from Germany. This ensures dimensional tolerance consistency of ±0.02mm for our copper and brass fittings.
Our core R&D engineering center houses 15 senior material scientists and structural engineers, including doctorates and professors collaborating directly with the University of Science and Technology of China (USTC) to analyze fluid dynamics and pressure fatigue.
We source high-purity C12200 phosphorus-deoxidized copper. For specialty products, our high-grade ITO film (no shrinkage) and uniform liquid crystal spacers are sourced directly from Japan, and specialized resins are imported from Europe.
Every batch undergoes thermal shock testing ranging from 10°C to 90°C for 30 minutes, combined with continuous high/low temperature exposure chamber trials at 75°C and -35°C for 500 hours to simulate extreme environments.
To assure a defect rate of below 0.05%, our factory uses advanced MES-controlled vacuum drying ovens and inline helium mass spectrometer testing to verify joint tightness under high pressures.
We provide full structural customization of copper propress fittings, double filter driers, and special service manifolds. We support direct client CAD engineering drawings with a low initial MOQ of 500 units.
Transitioning global commercial and residential refrigeration setups from high-heat brazing to safe, press-connect configurations.
Modern building codes are increasingly restricting open-flame brazing inside existing structures, making flameless copper connections essential. In localized commercial construction, HVAC Propress fittings offer a fast, reliable jointing method that meets these safety standards.
Our engineered copper filter driers and service valves are optimized to handle both physical stress and thermal expansion across several key applications:
How Taojun is adapting to the phase-down of HFC refrigerants and moving toward smart, automated manufacturing.
Collaborated as Zhejiang University's Xiangshan Refrigeration Accessories Factory, developing early structural copper filter driers and service valves for domestic appliance manufacturers.
Established the "Taojun" brand for condensers and stop valves. Implemented the MES intelligent workshop management system, transition to CNC end-forming lines, and earned ISO 9001:2008 certification.
Certified as a national high-tech enterprise. Upgraded manufacturing with automated CCD camera inspection lines, digitalized helium mass spectrometer leak testing, and updated ISO 9001:2015 registration.
Developing propress connections optimized for high-pressure natural refrigerants like R290 (propane) and CO2 (R744). Incorporating double-barrier HNBR seal tech to ensure compatibility with synthetic POE and PAG oils.
Strategically located in Ningbo to ensure secure raw material sourcing, automated buffering, and fast global shipping.
Located in Xiangshan, Ningbo, our facility benefits from direct access to one of the world's largest container shipping hubs, Ningbo-Zhoushan Port. This proximity minimizes land transit and helps secure export shipments.
By managing all primary manufacturing steps in-house—including tube cutting, end spin forming, molecular sieve filling, high-frequency brazing, and surface painting—we maintain tight control over quality, costs, and lead times.
We source raw copper cathodes through long-term partnerships with domestic smelters. This direct connection ensures a stable material supply, even during volatile commodity cycles, and guarantees the metallurgical purity of our press fittings.
Logistics Advantage: Direct global container shipping via Ningbo-Zhoushan Port within 48 hours of packaging completion.
We offer customized stocking programs for regular OEM/ODM clients, maintaining raw materials and semi-finished products to protect against market fluctuations.
Our manufacturing execution system (MES) integrates order forecasting with production scheduling, keeping lead times for standard orders within 15 to 25 days.
Our compliance with international standards is supported by official third-party certifications and verified quality control audits.
Registration No.: 41325Q00065R0S. Covers design, development, and production of filter driers, condensers, and access valves.
Fully auditable and verified via CNCA China (www.cnca.gov.cn) and partner Zhongci International.
Ensures mechanical component safety under high operating pressures and conforms to strict environmental standards.
Our corporate culture drives our engineering processes. Through consistent refinement, we ensure that every technician, quality inspector, and design engineer shares a commitment to four core values: Honesty, Innovation, Responsibility, and Cooperation.
We provide clear material certifications and traceability for our raw copper alloys, ensuring reliable wall thickness and mechanical strength.
We continuously update our tooling designs and manufacturing processes to align with the changing operating demands of modern refrigerants.
We manufacture using environmentally compliant processes that conform to EU RoHS and REACH regulations, utilizing eco-friendly packaging.
We work closely with global distributor networks and local service support teams to deliver responsive after-sales support.
Technical clarifications on copper press fittings, filter driers, and OEM/ODM specifications.
Copper propress connections eliminate the need for open flames on job sites, removing the requirement for hot work permits and reducing fire safety risks in occupied buildings. Additionally, pressing avoids inner oxide scaling inside the line set, which can occur during brazing if nitrogen purging is not properly performed. This protection helps prevent premature damage to compressor valves and expansion components.
Our heavy-duty copper filter driers and reinforced press connections are designed and tested to withstand continuous working pressures of up to 700 PSI (approximately 48 bar). This makes them fully compatible with modern high-pressure refrigerants, including R410A, R32, R134a, and eco-friendly hydrocarbons like R290.
We use a combination of automated process controls and high-precision testing. All valve bodies are machined from premium brass and copper on high-accuracy CNC lines. Every unit undergoes automated pneumatic bubble trials followed by helium mass spectrometer leak testing under vacuum conditions, maintaining a factory defect rate below 0.05%.
Yes. Our filter driers utilize high-purity 3A molecular sieves combined with activated alumina. This design is engineered to absorb moisture and acid without stripping or reacting with synthetic Polyolester (POE) or Polyalkylene Glycol (PAG) oils, ensuring stable lubricant chemistry within the compressor loop.
Yes, we provide full custom services. Our internal engineering department can adjust step dimensions, tube wall thicknesses, and integration profiles based on your CAD drawings. We support custom requests with a low initial MOQ of 500 units per specialized configuration.
Our manufacturing and quality systems are certified under GB/T19001-2016 / ISO9001:2015 (CNCA verified). Additionally, our export products comply with the EU RoHS Directive for environmental safety and carry US UL compliance listings for pressure performance.
Heavy-duty industrial and commercial components engineered for high-pressure durability.
Taojun
