Within any vapor-compression refrigeration cycle, moisture, non-condensables, and debris pose critical threats. As a leading manufacturer of liquid line filter driers, Ningbo Taojun Refrigeration Equipment Co., Ltd. designs and manufactures products engineered to optimize system efficiency and prevent compressor breakdown.
Designed specifically to adsorb water molecules while ignoring refrigerant molecules. This guarantees a water adsorption rate of ≥20%, locking down critical system moisture limits before acids can form.
Active solid core formulations work to neutralize hydrochloric and hydrofluoric acids generated under thermal breakdown conditions. They also catch copper filings, flux residue, and oxidation scale.
Engineered with structural mesh and porous cores to optimize cooling, reduce pressure drops, and boost refrigerant velocity, enhancing cycle COP.
Located in Xiangshan, Ningbo, our company was founded in 1988 as the Xiangshan Refrigeration Accessories Factory of Zhejiang University. Over the past 30+ years, we have grown into a national high-tech enterprise specializing in the design, development, production, and sales of copper filter driers, check valves, air conditioning valves, and brass/copper components.
Our flagship "Lingshan" and "Taojun" brand products serve major home appliance enterprises like Haier, Midea, Gree, Whirlpool, Electrolux, and Xinfei. With ISO9001:2008, EU RoHS, and US UL certifications, we meet stringent global compliance standards.
Taojun filter driers are designed to handle demanding industrial conditions, commercial refrigeration, and residential applications around the world.
Copper drying filters ranging from 10g to 20g are integrated into residential refrigeration loops to provide continuous moisture cleanup, supporting stable long-term operation for over 10 years.
Specialized desiccant filter cartridges protect critical capillary lines and expansion valves in commercial ice machines from ice blockages, preventing system faults and costly service calls.
Automotive air conditioning loops and refrigerated transport units face significant vibration and heat stress. Our solid-core filters provide reliable filtration under these high-demand road conditions.
To ensure high quality, we import our ITO film directly from Japan (for zero-shrinkage stability) and our adhesives directly from Europe. Protective films are designed to withstand temperatures of 80°C to 90°C.
Every copper filter shell is sealed using automated argon arc welding, followed by helium leak testing and high-pressure inspection to ensure zero leakage under operation up to 500 PSI.
Finished filter driers undergo 500-hour environmental chamber testing (-35°C to 75°C), thermal shock testing (10°C to 90°C for 30 minutes), and moisture removal in high-temperature ovens before vacuum sealing.
Establishing our specialized production base in Xiangshan.
Transitioning to digital shop floor control for tracking processes.
Optimizing smart filtration technology for eco-friendly refrigerants.
We hold official GB/T19001-2016 / ISO9001:2015 registration (No. 41325Q00065R0S), verified through the CNCA database. This system monitors our entire production line, tracking components from raw copper extrusion to final vacuum packaging.
We offer pre-sales technical consultation led by engineers with over 15 years of refrigeration experience. All standard lines are backed by our 1-year comprehensive replacement warranty and life-long technical support.
ISO 9001 Certificate
Certification Scope
Safety Approvals
As the global HVAC industry shifts toward low-GWP (Global Warming Potential) alternatives, filtration systems must evolve. Taojun is engineering next-generation liquid line filter driers to meet these changing environmental and mechanical standards.
Developing compatibility solutions for HFO and natural refrigerants (such as R290 propane and CO2). This involves optimizing binder chemistries inside the solid core to prevent degradation under high operating temperatures and pressures.
Researching smart filter-driers featuring embedded moisture and pressure-drop sensors. These units aim to provide real-time alerts when the desiccant reaches saturation or pressure drops exceed limits, helping to protect the compressor.
Adopting eco-friendly production methods, including lead-free brazing processes, 100% recyclable copper construction, and reduced-emission heat treatment ovens to lower the carbon footprint of our components.
A 3A molecular sieve has a pore opening size of approximately 3 Angstroms. This allows it to adsorb water molecules (about 2.8 Å) while excluding refrigerant molecules, preventing chemical breakdown. Activated alumina is typically added to help adsorb organic acids and impurities, making a blended core suitable for systems that have experienced motor burnout.
Sizing depends on the system's total refrigerant charge, the refrigerant type (e.g., R134a, R410A, R290), liquid line pipe sizing, and the expected flow rate. Standard residential systems typically use 10g to 25g copper filter driers, while commercial refrigeration and larger heat pumps require larger solid-core canisters to prevent excessive pressure drops.
A filter drier should be replaced during any system service that opens the refrigerant loop. It should also be replaced if there is a noticeable temperature drop across the filter (indicating a restriction/clog) or if a moisture indicator shows high moisture levels.
Yes. As an OEM and ODM supplier, we manufacture filter driers in customized lengths, diameters, wall thicknesses, and connection sizes (soldered copper ODF or threaded SAE flare connections) to match your system specifications.
Taojun