A HVAC Refrigeration Copper Filter Drier is a device used to filter impurities and absorb moisture from refrigerants, mainly used in refrigeration systems such as refrigerators and air conditioners to ensure the normal operation of the refrigeration system.
■ Features
· Detailed analysis
- Function
Adsorb moisture: prevent water from freezing and causing pipeline blockage (ice blockage), and avoid chemical reactions with refrigerants to corrode metal parts.
Filter impurities: intercept metal debris, dust and other particles to protect precision components such as compressors and expansion valves.
- Structure and Materials
Shell: Made of metal material (copper or stainless steel), resistant to high pressure and sealed.
Filter: Multi layer metal mesh that intercepts particles of different sizes.
Desiccant: Silica gel, molecular sieve or activated alumina, highly absorbent.
Auxiliary layer: Some models contain activated carbon, which adsorbs acidic substances or odors.
- Working principle
When the refrigerant flows through the HVAC refrigeration copper filter drier:
Coarse filtration: The filter screen blocks larger particles (such as welding slag and metal shavings).
Moisture absorption: Desiccant absorbs moisture and reduces the humidity of refrigerant.
Fine filtration: The fine filter layer removes small impurities to ensure the cleanliness of the refrigerant.
- Installation location
Usually located between the condenser and expansion valve (in household air conditioning) or at the outlet of the accumulator (in large systems), in the liquid pipeline.

■ Specification
Working principle
The liquid flows into the filter from the inlet undera certain pressure, impurities are intercepted by the filtering medium inside the refrigeration copper filter drier, and the filtered liquid flows out from the outlet. When the filtration reaches a certain stage, the pressure difference between the inlet and outlet increases, and backwashing is required. At this time, the backwash valve is opened, and hydraulic pressure flows from the backwash inlet to the backwash from bottom to top, restoring the filtering function of the refrigeration copper filter drier.
gr | D Ø | SD2 L | SD3 L | gr | D Ø | SD2 L | SD3 L | gr | D Ø | SD2 L | SD3 L | gr | D Ø | SD2 L | SD3 L |
SD5 | 16 | 78 | 83 | SD10 | 19 | 95 | 98 | SD20 | 24 | 111 | 116 | SD50 | 30 | 160 | 168 |
SD7 | 16 | 92 | 97 | SD12 | 19 | 103 | 106 | SD25 | 24 | 130 | 135 | SD60 30 | 178 | 186 | |
SD7.5 | 16 | 96 | 101 | SD13 | 19 | 108 | 113 | SD30 | 24 | 140 | 145 | SD70 | 30 | 195 | 200 |
SD8 | 16 | 101 | 106 | SD15 | 19 | 120 | 125 | SD35 | 24 | 155 | 160 | SD80 | 30 | 210 | 215 |
SD10 | 16 | 112 | 117 | SD18 | 19 | 128 | 133 | SD40 | 24 | 170 | 175 | ||||
SD20 | 19 | 141 | 146 | SD50 | 24 | 200 | 205 | ||||||||
±2 | ±2 | ±2 | ±2 | ±2 | ±2 | ±2 | ±2 | ||||||||
■ Non-Standard Customization

By adsorbing the moisture in the refrigerant with a desiccant, it completely avoids pipeline blockage (ice blockage) caused by moisture freezing, while preventing the reaction between water and refrigerant to generate acidic substances, protecting metal components (such as compressors and copper pipes) from corrosion.

Multi layer filter (coarse filter+fine filter) can intercept various impurities from welding slag, metal shavings tomicron sized particles, prevent compressor wear, expansion valve jamming and other faults, and extend the life of core components.
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