Examine our leading factory-direct refrigeration valves, core drier cartridges, and quick adapters. Built for zero-leak configuration and optimized refrigerant control loop operations.
In the global cooling and heating industries, system pressure boundaries must exhibit flawless sealing and structural reliability. The Copper Split Valve (commonly designated as a service valve or stop valve) acts as the vital partition mechanism linking compressor systems to external heat exchange loops. As the industry moves toward high-pressure, eco-responsible refrigerants like R32, R410A, and natural refrigerants such as Propane (R290), the mechanical integrity of copper split valves has become paramount.
For engineering procurement leaders and HVAC system architects, sourcing the right split valve goes beyond purchasing metal components. It requires identifying partner manufacturers that combine high-grade metallurgy with ultra-precise dimensional control. Ningbo Taojun Refrigeration Equipment Co., Ltd. (operating under the global brand TAOJUN and national brand Lingshan) has dedicated 38 years to resolving the complex fluid isolation problems encountered by commercial and residential appliance enterprises.
Our valves are engineered using high-purity brass and copper extrusion components, designed to prevent chemical degradation and micro-cracking under cycling system stresses. Originating in 1988 as the Xiangshan Refrigeration Accessories Factory of Zhejiang University, our engineering approach remains deeply rooted in collaborative industrial R&D.
Inside TAOJUN's Smart Manufacturing Plant: Automated CNC processing and automated helium leak detection procedures.
Quantifying our industrial capabilities and global footprint. We execute production with zero-compromise precision.
Fluctuations in copper prices (LME index) force modern supply chains to adopt forward-contract pricing models. In addition to cost stability, material purity is crucial. TAOJUN uses HPb59-1 leaded brass and oxygen-free copper pipes to ensure high ductility and prevent cracking during system flares.
Refrigerant leakage accounts for substantial lifetime emission footprints in HVAC installations. Procurement engineers prioritize split valves equipped with reinforced dual O-rings made from Hydrogenated Nitrile Butadiene Rubber (HNBR), which prevents refrigerant permeation even at sustained operating temperatures up to 135°C.
Importing components into highly regulated markets like Europe and North America requires compliance with the RoHS Directive, REACH regulations, and UL certification. TAOJUN provides pre-verified certification pipelines to simplify compliance checks for importing OEMs.
HVAC/R operations span dynamic applications. Our component solutions are optimized for various sectors:
Every manufacturer designs condenser coils and compressor loops using custom geometries. We leverage our partnership with the University of Science and Technology of China to build custom fittings, including 1/4" to 5/8" split layouts, L-bend gas stops, and tailored brazing collars.
Modern heat pumps require a high vacuum level during field installation. A tiny leak in the service valve can cause moisture contamination. Our valves are processed in a controlled MES workshop, eliminating moisture residues before hermetic shipping seal application.
With the HVAC industry shifting toward lower GWP refrigerants, operating pressures can exceed 120 bar. TAOJUN is developing next-generation forged brass stop-valves designed to handle high burst pressure levels, keeping refrigeration loops secure under extreme thermal cycles.
A closer look at how TAOJUN combines advanced raw material selection with precision forging technologies.
Our split valves use copper with at least 99.9% purity to maximize thermal conductivity, enhance corrosion resistance, and simplify field brazing without causing material embrittlement.
All critical valve seats are turned on high-speed automated lathe complexes imported from Germany. This machinery maintains dimensional tolerances within ±0.02 mm, preventing internal assembly stress.
Every single valve undergoes pressure test protocols. We test using high-vacuum helium mass spectrometry, verifying leak levels below 1x10⁻⁷ mbar·l/s. This helps protect the climate from refrigerant leakage.
To prevent ice formation inside the expansion device, TAOJUN filters utilize an integrated 3A molecular sieve. This sieve has an active water absorption capacity greater than 20%, trapping acids and moisture within the HVAC loop.
From a university-associated workshop to a nationally recognized High-Tech manufacturing center, our growth is built on engineering quality.
Building our first dedicated component production facility in Ningbo.
Deploying automated MES intelligent manufacturing systems across our workshops.
Expanding global production for modern high-pressure natural refrigerant valves.
Ningbo Taojun Refrigeration Equipment Co., Ltd. operates under strict quality guidelines verified by international agencies. Every shipment is fully traceable back to raw casting batches.
ISO 9001:2015 Certification
Verified OEM Scope
UL Standard Verification
CE & RoHS Directive Conformity
- Detailed component drawing design & verification.
- 1-on-1 technical service with factory engineers.
- Rapid response window: Technical inquiries answered within 8 hours.
- Cleanroom filter drier molecular assembly.
- Multi-point visual CCD inspection for thread alignment.
- Full component serialization for product trace compliance.
- Complete structural warranty for 12 months post-installation.
- Live installation guidance & virtual field system evaluations.
- Ongoing engineering support for refrigerant upgrades.
Get authoritative answers to technical, manufacturing, and procurement inquiries about copper split valves and service components.
Complete your pipeline installations with our high-durability coiling tubing, quick-disconnect adapters, and specialized thermostat control components.
Taojun
