Engineered for high thermal transfer efficiency, corrosion resistance, and structural integrity under high working pressures.
Designed with 3A molecular sieves to prevent moisture accumulation and acid-induced failures in high-efficiency cooling circuits.
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Industrial-grade self-fluxing alloy for high tensile strength joins in copper-to-copper tube interfaces.
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Ergonomically designed for tight-space installation and robust field repairs in building automation piping.
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High-temperature resistance capacitors engineered to stabilize starting currents and ensure long runtimes.
Inquire Now →As Berlin and the wider Brandenburg region push forward with the "Wärmepumpen-Offensive" (Heat Pump Campaign) and transition to meet strict European decarbonization targets by 2045, the requirements for refrigeration and plumbing components have radically tightened. The phasing down of traditional HFC refrigerants has triggered a mass shift toward natural alternatives such as Propane (R290), Carbon Dioxide (R744), and Isobutane (R600a).
These natural refrigerants operate under demanding thermodynamic parameters: CO2 cooling loops can reach working pressures exceeding 120 bar, while hydrocarbon systems require strict leak-proof security to eliminate flammability risks. Consequently, Berlin's engineering firms, system integrators, and industrial installers demand ultra-precise, thick-walled copper pipe fittings, moisture-absorbing desiccant filter driers, and high-tensile brass service valves capable of enduring extreme pressures and temperature cycles without chemical degradation.
At Ningbo Taojun Refrigeration Equipment Co., Ltd., we customize and supply our specialized fittings directly to match these exact European standards, combining high-grade deoxidized phosphorus copper (DHP-Cu) and lead-free compliant brass with advanced machining accuracy.
Watch our state-of-the-art manufacturing processes and automated quality verification protocols in action.
Founded in 1988, our predecessor was the Xiangshan Refrigeration Accessories Factory of Zhejiang University. Today, Ningbo Taojun Refrigeration Equipment Co., Ltd. (also recognized globally as Juntao Refrigeration) has matured into a comprehensive, high-tech engineering enterprise integrating design, development, high-volume production, global supply chain sales, and dedicated after-sales support.
Our core manufacturing facility, located in the beautiful tourist coastal city of Xiangshan, Ningbo, spans tens of thousands of square meters. Over our 35+ years of operational history, we have continuously modernized our workshops. Today, we utilize key high-tech manufacturing equipment imported directly from Germany to achieve tight tolerances (down to ±0.02mm) and absolute repeatability. In 2021, our commitment to technological and design innovation earned us the prestigious title of a National High-Tech Enterprise in China.
We are a certified ISO 9001:2015 company (Registration No: 41325Q00065R0S), with all our products conforming fully to EU RoHS, REACH, and US UL standards. Our global client base spans domestic and commercial refrigeration giants such as Haier, Xinfei, Midea, Gree, Whirlpool, Electrolux, and Huarui.
Our core production lines incorporate automated German pipe forming machinery, precision CNC lathes, and robot-assisted brazing stations. This machinery ensures maximum joint consistency and clean internal paths free of particulate residues.
Our dedicated R&D center houses 15 senior research engineers, including doctors and professors from the University of Science and Technology of China (USTC) and Zhejiang University, pushing boundaries in high-pressure thermodynamic designs.
Our raw materials conform to highest specifications. ITO films are sourced from Japan to prevent shrinkage or color mismatch; all copper raw material is tested for deoxidization purity (Cu ≥ 99.9%).
Finished products undergo 500-hour high/low temperature cycles (+75°C to -35°C), thermal shock testing, and 24-hour continuous pressure holding. We run 100V high-voltage insulation tests for electrical parts and helium mass spectrometer leak tests for pressurized fittings.
Meeting German DIN standards and localized HVAC/R requirements.
Integrating our copper elbows, T-fittings, and access valves into residential heat pump outdoor units. Optimized for R290 (Propane) systems requiring extremely tight, vibration-resistant connections to minimize refrigerant charge loss.
Used heavily in Transcritical CO2 systems installed in Berlin retail stores. Our heavy-walled copper-iron alloy fittings withstand structural pressure stresses up to 130 bar without fatigue or micro-fissure expansion.
Providing custom extruded copper filter driers and service valves for fan coils, water chillers, and localized district cooling loops in Berlin's modern office districts (such as Adlershof and Potsdamer Platz).
| Material Code (EN / DIN) | Composition | Tensile Strength (MPa) | Max. Pressure Rating | Primary Application in Berlin Systems |
|---|---|---|---|---|
| CW024A / SF-Cu (DIN 1787) | Cu ≥ 99.9%, P: 0.015-0.040% | 220 - 300 MPa | Up to 130 Bar (Heavy Wall) | Refrigerant tubing, elbows, filter drier shells, U-bends |
| CW617N / CuZn40Pb2 (DIN 50930-6) | Cu: 57-59%, Pb: 1.6-2.5%, Zn: Bal. | 380 - 500 MPa | Up to 80 Bar | Split service valves, HVAC manifolds, threaded connectors |
| CW724R / CuZn21Si3P (Lead-Free) | Cu: 75-77%, Si: 2.7-3.5%, Zn: Bal. | ≥ 540 MPa | Up to 100 Bar | Eco-compliant potable water and natural refrigerant valves |
Our copper filter driers are the product of decades of engineering iterations. Designed to trap moisture, capture acidic contaminants, and filter particulate debris, they protect the compressor unit—the heart of the refrigeration circuit.
Directly verified and audited refrigeration production flows.
Our official quality commitment is validated by GB/T19001-2016/ISO9001:2015 certification (Registration No.: 41325Q00065R0S). This scope covers the manufacture of critical filter driers, condensers, and brass valves.
We work in close cooperation with international laboratories to ensure that our fittings are fully compliant with environmental directives such as RoHS, REACH, and WEEE, facilitating seamless import and customs clearance processes for our European partners in Germany and beyond.
Main Certification Document
Detailed Scope of Certification
From custom drawing designs to global dynamic shipment tracking.
Get in touch directly with our application engineers. We offer 1-to-1 support to evaluate your drawings, recommend proper copper-brass alloys, and answer system design concerns within 8 hours.
We leverage CNC machinery and fast prototyping blocks to deliver customized sample components in under 7 working days, enabling fast validation on physical test rigs.
We stand behind our components with a comprehensive 1-year product replacement warranty and provide life-long technical support. All feedback is logged in our quality refinement cycle.
Answering key queries from procurement managers and system engineering designers.
Yes. All our raw materials are carefully selected and tested. Our copper components use high-purity CW024A alloy which has negligible lead content, conforming to EU environmental directives. For brass parts, we supply low-lead or lead-free options to meet Germany's strict potable water and environmental safety regulations (e.g., DIN 50930-6 and the German UBA list).
Standard copper elbows and joints are rated for normal HFC pressures (up to 45 bar). For natural refrigerants like Propane (R290) and Carbon Dioxide (R744), we offer custom heavy-walled fittings and copper-iron alloys (like K65) that successfully withstand burst pressures exceeding 120-130 bar. We run hydrostatic pressure tests on every batch to ensure absolute safety.
Every single filter drier is oven-dried to extract residual moisture before assembly. Immediately after welding, the filter driers are pressurized and hermetically sealed with plastic airtight caps. This ensures that the 3A molecular sieve desiccant inside remains 100% active until it is unsealed and brazed into the system by the field technician.
For standard catalogue fittings, our typical MOQ starts at 500 units. For customized dimensions or special brass components, the MOQ is negotiated based on production setup constraints. Once samples are verified, production lead times average 15-25 days, with flexible sea, air, or rail transport options directly into Germany (Berlin, Hamburg, or Duisburg hubs).
High-quality engineering components for commercial chillers, domestic freezers, and industrial HVAC installations.
L-Bend gas stop valve with heavy forged brass body to ensure absolute pressure isolation during maintenance.
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Dual manifold gauges configured for direct readouts, aiding high-precision system charge calibrations.
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High heat exchange coefficient layout featuring copper tubes expanded into corrugated aluminum fins.
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Reinforced outer layer designed to withstand physical abrasion, high temperatures, and chemical residues.
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DHP-copper bends, couplings, and adapters, certified clean inside according to DIN 8964.
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Corrosion-resistant aluminium body layout offering excellent weight reduction for mobile cooling equipment.
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Heavy-duty solid core filter designed for maximal mechanical stability and high moisture absorption.
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Custom designed cooling pathways roll-bonded to ensure highly uniform temperature distribution.
Inquire Now →Partner with a direct ISO 9001:2015 certified manufacturer. Request customized quotes, mechanical drawings, or physical samples for your Berlin HVAC/R projects.
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