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Zhejiang Jingliang Copper-Tube Products Co., Ltd

Wholesale VRF System Copper Piping

VRF System Copper Piping

-- Steady & Reliable Manufacturer --

Engineering Connectivity for Advanced VRF/VRV Systems

Variable Refrigerant Flow (VRF) systems, also known as VRV (Variable Refrigerant Volume), represent the most sophisticated segment of modern HVAC technology. Unlike traditional split systems, a VRF system utilizes a single outdoor condensing unit connected to multiple indoor units, each capable of independent temperature control. This complexity places immense demand on the copper piping network that serves as the system's "circulatory system." Because VRF systems operate by varying the flow of refrigerant based on real-time demand, the piping must handle constant fluctuations in pressure, temperature, and flow velocity. At Zhejiang Jingliang, we specialize in manufacturing copper tubing specifically engineered for these high-performance environments. Our VRF-grade piping is produced using high-purity C12200 phosphorus-deoxidized copper, ensuring the structural integrity required to manage the high operating pressures of R410A and R32 refrigerants, which are standard in VRF technology.

The success of a VRF installation depends heavily on the internal cleanliness and dimensional accuracy of the copper pipes. Any residual oils or moisture left inside the tube during manufacturing can react with the polyolester (POE) lubricants used in VRF compressors, leading to acid formation and premature system failure. To mitigate this risk, our VRF copper tubing undergoes a multi-stage cleaning and bright annealing process, followed by nitrogen purging and immediate capping. This ensures that the pipes arrive on-site "Oxygen-Clean" and dry. Furthermore, because VRF systems involve extensive branching—often utilizing Refnet joints and Y-splitters—our tubing is designed with superior ductility. This allows technicians to perform precise bends and high-quality brazing without the risk of kinking or joint leaks. By choosing our VRF-optimized copper, engineers and contractors can ensure that their multi-zone climate control systems operate at peak efficiency with a service life exceeding 25 years.

VRF Technical Parameters & Standards

FeatureTechnical Specification
Material GradeC12200 (Cu-DHP), Phosphorus Deoxidized
Operating PressureDesigned for R410A/R32 (Up to 4.3 MPa)
Internal Residue< 0.020 g/m² (Exceeds ASTM B280)
Wall Thickness TypeASTM B280 / EN 12735-1 / JIS H3300
Cleanliness MethodUltrasonic Degreasing & Nitrogen Purging
Temper RangeO60 (Soft Coils) / H58 (Hard Straight)
Concentricity> 95% (Ensures uniform heat distribution)
ElongationMin 40% (For easy Refnet installation)
Grain Size0.025mm to 0.045mm

Applications in Multi-Zone Climate Control

VRF system copper piping is predominantly used in large-scale commercial and high-end residential projects where energy efficiency and individual zone control are paramount. This includes modern office buildings, where different departments may require different heating or cooling levels simultaneously. In the hospitality sector, hotels utilize VRF piping to provide guests with personalized comfort while maintaining low operational costs for the building owner. Our piping is also essential for data centers and healthcare facilities, where precision cooling is a safety requirement. Because VRF systems can support long pipe runs (often exceeding 100 meters in vertical height), our straight-length hard-drawn pipes are used for main vertical risers, while our annealed soft coils are used for the final connections to indoor fan coil units. They are also widely used in heat recovery VRF systems, which can simultaneously heat one room while cooling another by transferring energy through the refrigerant lines.

Advantages of Specialized VRF Tubing

The primary advantage is "System Reliability." VRF systems are a significant financial investment; our piping protects that investment by eliminating the most common causes of leakages and compressor burnouts. The high burst pressure rating of our tubes provides a significant safety margin for high-pressure eco-friendly refrigerants. Another advantage is "Installation Speed." Our tubes' consistent wall thickness and superior ductility make them easier to flare and braze, which is critical when a single project might involve hundreds of joints. The "Mirror-Smooth" internal surface reduces the pressure drop across the entire system, allowing the inverter compressor to work less and save more energy. Additionally, our specialized packaging—including color-coded caps and reinforced bundles—ensures that the pipe remains pristine during site storage, reducing the risk of environmental contamination before the system is even commissioned.

Payment, Shipping, and Project Logistics

We understand that VRF projects run on strict construction timelines. We offer flexible payment terms, including T/T and L/C at sight, and for major international contractors, we can discuss project-based credit lines. We ship VRF piping in both pancake coils and straight lengths, optimized for container loading (5.8m lengths to fit 20ft containers). Our packaging includes UV-resistant shrink wrap and heavy-duty wooden crates for straight lengths to prevent bending. We provide full documentation required for green building certifications (LEED/BREEAM), including Mill Test Reports and RoHS compliance. Our logistics team coordinates with freight forwarders to provide "vessel-side" delivery, ensuring that the materials arrive just in time for the piping phase of your construction schedule. We also offer "Line Set" customization for large residential VRF projects, providing pre-insulated and pre-flared options to further reduce site labor.

  • Q: Why can't I use standard plumbing copper for VRF?
  • A: Plumbing copper is not cleaned to the same standards and may not have the pressure rating required for R410A. VRF systems require high-cleanliness ACR tubing to prevent compressor damage from internal residues.
  • Q: Do you provide the Refnet joints as well?
  • A: Yes, we provide a complete range of copper Refnet joints and manifolds that are compatible with all major VRF brands like Daikin, Mitsubishi, and Gree.
  • Q: What is the maximum height difference your pipes support?
  • A: Our hard-drawn pipes are rated for the high pressures required for vertical heights up to 90-110 meters, provided the system is designed with the proper oil traps.
ABOUT US
30+YEARS OF
EXPERIENCE
About Us

A Reliable Partner of the Copper Tube Industry

Zhejiang Jingliang Copper-Tube Products Co., Ltd is China VRF System Copper Piping and VRF System Copper Piping Factory, which established in 1994, has been deeply involved in the copper tube industry for over three decades. The company primarily produce various specifications of products such as copper tubes, brass tubes, copper square tubes, fin copper tubes, copper capillary tubes, condenser copper tubes, copper evaporator tubes, and conductive rods, which are of quality and have earned the trust and acclaim of customers both domestically and internationally.

Wide Applications:

These products are widely used in various fields including air conditioning, refrigeration, heat exchange, sanitary ware, automotive, machinery, electric furnaces, and chemical industries.

Convenient Transportation:

Strategically located in Tangpu Town, renowned as the “home of copper tubes” in East China. Our company enjoys a prime location, adjacent to the Shangsan Expressway and National Highway 104, and is conveniently situated just over 70 kilometers from Hangzhou and Ningbo, ensuring easy accessibility and a business position.

Strong Financial Resources:

With its strong financial resources and advanced copper tube processing technology, our company holds an advantageous position in market share, brand value, technological content, and product quality, becoming a preferred supplier for many listed groups.

Large Scale Production:

The company occupies an area of over 20,000 square meters, with a construction area of 12,800 square meters. In 2022, our annual production exceeded 7,500 tons, with a value output of up to 450 million yuan, demonstrating our strong production capacity and market competitiveness.

Comprehensive Industry Chain:

Jingliang has now developed into a complete industrial chain integrating smelting, extrusion, drawing, precision rolling, and annealing. It has been awarded multiple honors, including "Top Ten Copper Tube Enterprises" and "Leading Taxpayer in the Copper Tube Industry".

Smart Manufacturing:

Jingliang Copper-Tube Products will better integrate the concept of factory construction into its corporate development strategy, insist on refining technology and polishing products more finely, and the future of "intelligent manufacturing".

Genuine Cooperation:

Zhejiang Jingliang Copper-Tube Products Co.,Ltd warmly welcomes friends from all walks of life to visit and offer guidance. We look forward to joining hands with you to create a brilliant future together.

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