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Experience Sharing: Refrigeration System Filter Drier Function and Replacement Cycle

  • Release time: 2026-09-12

Experience Sharing: Refrigeration System Filter Drier Function and Replacement Cycle

Filter drier removes moisture and solid impurities from refrigerant circuit to safeguard core refrigeration components. Molecular sieve inside filter drier absorbs residual moisture and prevents ice blockage inside expansion valve. Particulate filter mesh traps metal chips and oxide debris generated during compressor operation. Pressure difference across filter drier increases when internal adsorbent and filter mesh are clogged. For newly commissioned cold room systems, the first filter drier replacement is recommended after 500 running hours. Formal refrigeration factory selects filter drier capacity matching pipeline diameter and refrigerant flow rate. Xindacool equips high-quality filter driers for all complete cold room refrigeration equipment sets. Moisture accumulation in the system will trigger acidification and corrode compressor internal metal parts. Around 27% of expansion valve blockage faults are associated with overdue or undersized filter driers. Color indicator on sight glass helps operators judge moisture state of refrigerant conveniently. Filter drier must be replaced promptly once clogging or high moisture signs are detected. Timely maintenance of filter drier keeps refrigerant circuit clean and extends whole system service life.

FAQ

  1. Q: What is the main function of filter drier in refrigeration circuit? A: It removes moisture and solid impurities from refrigerant.
  2. Q: What material inside absorbs moisture in filter drier? A: Molecular sieve adsorbs residual moisture inside the refrigeration system.
  3. Q: When to replace filter drier for newly commissioned systems? A: First replacement after 500 working hours.
  4. Q: What percentage of expansion valve blockage relates to filter drier problems? A: 27% of expansion valve blockage faults come from filter drier issues.
  5. Q: What component helps check refrigerant moisture visually? A: Sight glass with color indicator shows refrigerant moisture level.

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