Direct from Ningbo Taojun's ISO 9001:2015 accredited facility, custom-manufactured to support clean system charging, evacuation, and real-time operational metrics.
Founded in 1988 as the Xiangshan Refrigeration Accessories Factory of Zhejiang University, Ningbo Taojun Refrigeration Equipment Co., Ltd. has grown over three decades into a nationally certified high-tech enterprise. Based in Xiangshan, Ningbo, our facility occupies a key hub of manufacturing excellence, integrating advanced design, raw material engineering, and testing processes under a single unified standard.
Under our renowned brands "Lingshan" and "Taojun", we manufacture top-tier HVAC/R components, including filter driers, check valves, custom manifold gauge components, air conditioning valves, and high-conductivity copper accessories. Our corporate philosophy is defined by ISO 9001:2015 protocols, EU RoHS environmental safety standards, and rigorous US UL safety listings.
In modern industrial refrigeration and high-capacity HVAC systems, precision diagnostic instruments are critical. The manifold gauge stands at the center of system evacuation, pressure testing, and refrigerant recharging. As global environmental mandates target global warming potential (GWP) and phase down traditional hydrofluorocarbons (HFCs), diagnostic equipment must adapt to new chemical limits, extreme operating pressures, and micro-leakage tolerances.
The global commercial and industrial cooling sector is experiencing a rapid shift in refrigerant selections. Under regulations such as the European F-Gas Regulation and the Kigali Amendment, traditional refrigerants like R22 and R404A are being replaced by high-pressure, mildly flammable (A2L) or natural refrigerants. Diagnostics now routinely require compatibility with R32, R290 (propane), R744 (CO₂), and R1234yf.
OEM buyers, commercial cooling contractors, and procurement departments at companies like Midea, Gree, and Whirlpool require component partners that offer more than low unit costs. Modern procurement teams evaluate manufacturers on five distinct technical dimensions:
Instrument accuracy must remain true within ±1.6% across standard temperature swings, eliminating the need for frequent field adjustments.
Compliance with RoHS and REACH regulations is essential to ensure components are free from heavy metals or banned plasticizers.
Manifold designs must feature dials and sealing systems optimized for multiple refrigerant scales, reducing the need for field technicians to carry redundant equipment.
Ningbo Taojun's integration of Factory 4.0 paradigms addresses modern market volatility. We utilize a highly integrated Manufacturing Execution System (MES) to coordinate every stage of production from alloy extrusion to final helium leak detection.
Our raw materials are sourced through a strictly managed supply chain. Key materials, including shrink-resistant ITO films and liquid crystal spacers, are imported from Japan, while premium-grade adhesives are sourced directly from Europe. This blend of global materials and efficient domestic assembly provides a distinct advantage in both performance and cost. Our high-precision copper extrusion processes maintain dimensional tolerances of ±0.02 mm, ensuring consistent wall thickness and long-term pressure containment.
Our diagnostic components undergo strict environmental simulation tests to ensure long-term reliability in demanding field conditions.
We operate a comprehensive testing process. Each valve and manifold block undergoes thermal shock cycling from 10°C to 90°C, high-pressure helium leakage profiling, and 24-hour continuous aging tests.
From light commercial air conditioners to large-scale industrial cold chains, our components deliver consistent, reliable performance.
Enables accurate refrigerant charge monitoring for split units and VRF networks. Compatible with R410A and R32, our manifolds help technicians ensure systems run at peak thermodynamic efficiency.
Essential for supermarket display cases and refrigerated shipping container maintenance. Our high-purity copper filter driers protect compressors from moisture and acid damage.
For critical manufacturing plants, chemical processing facilities, and large-scale data centers that depend on constant, stable cooling to maintain operational integrity.
From a specialized academic factory to an automated global HVAC/R supplier.
Our original factory building in Xiangshan. Focusing on copper filter driers and basic valve designs, we established our reputation for quality in the domestic market.
Introduction of the MES intelligent workshop management system. This integration digitized our quality control processes and unified production parameters across our manufacturing lines.
Our current production facility. Operating high-precision automated assembly lines and serving global markets, we support international partners in Europe, the Americas, and Southeast Asia.
Our manufacturing lines are equipped with advanced systems to ensure consistent product quality.
Our filter driers feature 3A molecular sieves (water absorption ≥ 20%) combined with an activated carbon layer to effectively capture both moisture and acid from the refrigerant circuit. We use argon arc welding to ensure leak-free joints under high pressure.
To ensure high quality, each production run undergoes extensive verification testing. Samples are subjected to high and low temperature tests from -35°C to 75°C for 500 hours, thermal shock tests from 10°C to 90°C, and damp heat tests for 500 hours. The final sheet assemblies are completed with a 24-hour aging process, and our smart products are verified using a 100V high-voltage breakdown test.
Our official GB/T19001-2016 / ISO9001:2015 registration (No. 41325Q00065R0S) confirms our commitment to quality across our design and manufacturing processes.
GB/T19001-2016 / ISO9001:2015
Filter Driers, Condensers, & Access Valves
UL, CE, ROHS, REACH, & WEEE
We work closely with our partners throughout the product lifecycle. Our technical sales engineers leverage over 15 years of pump and refrigeration experience to help you select and configure the right solutions for your projects.
Our growth over the years is supported by our core values: Honesty, Innovation, Responsibility, and Cooperation.
Technical details and support information for our valves, filters, and manifold components.
Select a product below to view technical documentation, dimensional drawings, and material specifications.
Taojun