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Zhejiang Yinjia Copper Co., Ltd.
was set up in 2004.

Yinjia was established in 2004 with a registered capital of 55.6 million Yuan, located in the southeast of Zhejiang Province, China, 80KM from Hangzhou and 70KM from Ningbo, our factory covers an area of 24,000 square meters and has 240 manufacturing staff. We have also obtained the "Copper Pipe Production License" issued by the General Administration of Quality Supervision and Inspection of China and passed the ISO9001:2008 international quality management system certification.

As China Air Conditioning Three Way Pipes Manufacturers and Factory, Yinjia specializes in the production of precision purple copper tubes, purple copper pipeline components and steel pipe pipeline components. The main products are: copper pipe assemblies, connecting pipes, bellows, silencers, four-way valve pipe assemblies for air conditioners, suction and discharge pipes applied to compressors, high-efficiency copper pipes for heat exchangers, etc. The products we produce are widely used in the air conditioning, refrigeration and heat exchanger industries and are well evaluated by our customers.

In 2014, Yinjia's sales of copper materials reached 1500 tons, and the output of products reached 80 million pieces, with an output value of 28,000,000 RMB. The company takes the market as the guide and strengthens the internal management, reform and innovation, implements 6S management, lean production, constantly restructuring, and improves the quality of products and services. Supply Air Conditioning Three Way Pipe Custom

With the tenet of "customer first, quality first", the company is dedicated to providing customers with satisfactory products and considerate services.
  • 24,000

    Plant area

  • 150

    Manufacturing staff

  • 230+


  • 300,000

    Daily output



  • ISO 9001:2015

  • ISO 9001:2015

  • Invention Patent Certification

  • High and New Technology Enterprise Certification

Industry knowledge
Can a three-way pipe be used for both cooling and heating modes in air conditioning systems?
a three-way pipe can be used for both cooling and heating modes in air conditioning and HVAC (Heating, Ventilation, and Air Conditioning) systems. These components are essential in systems that utilize a heat pump, which is a versatile technology capable of both cooling and heating. 
Here's how a three-way pipe functions in this context
Reversing Valve: In a heat pump system, a key component is the reversing valve, which controls the direction of refrigerant flow. It is sometimes referred to as a four-way valve, as it has four ports. The reversing valve is responsible for reversing the flow of refrigerant through the system, changing its function from cooling to heating or vice versa.
Cooling Mode: During the cooling mode, the three-way pipe and the reversing valve direct the flow of refrigerant in a way that allows it to absorb heat from inside the conditioned space (indoor coil) and release it to the outside (outdoor coil). This process results in cooling the indoor environment.
Heating Mode: In the heating mode, the reversing valve and the three-way pipe change the direction of refrigerant flow. Now, the refrigerant absorbs heat from the outdoor air (even in cold weather) and releases it inside the conditioned space. This process provides heating.
Dual-Function Operation: The operation of a heat pump with a three-way pipe is a highly efficient way to both cool and heat a space using the same equipment. This dual-function capability is advantageous in regions with milder climates, where a dedicated heating or cooling system may not be necessary.
Efficiency: Heat pumps, with the help of a three-way pipe and reversing valve, can be more energy-efficient than traditional heating systems like electric resistance heaters or oil furnaces because they transfer heat rather than generate it.
What materials are commonly used for manufacturing air conditioning three-way pipes?                                                                                                                                                                                                                               
Materials used for manufacturing air conditioning three-way pipes can vary depending on the specific application, environmental conditions, and the type of refrigerant used. Common materials include:
Copper: Copper is a widely used material for manufacturing air conditioning three-way pipes. It offers excellent thermal conductivity, corrosion resistance, and durability. Copper is commonly used with traditional refrigerants like R-22 and R-410A.
Brass: Brass is used for specific applications, such as control valves or fittings within the three-way pipe assembly.
Copper-Nickel Alloys: These alloys offer excellent corrosion resistance and are used in marine and coastal air conditioning systems.
The choice of material depends on factors such as the type of refrigerant used, the intended application, environmental conditions, and cost considerations. Copper is a popular choice due to its excellent heat transfer properties and durability, but advancements in materials science have led to the use of alternative materials in certain situations. 

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